Review · secondary evidenceReview

Application of graphdiyne for promote efficient photocatalytic hydrogen evolution

Tian Wang and Zhiliang Jin · Results in Surfaces and Interfaces · 2024

This dossier represents secondary evidence: section summaries, claims and benchmarks are paraphrased for this database, not quoted. Check quantitative values against the linked primary study, and cite the review itself (10.1016/j.rsurfi.2024.100188) for its arguments.

5review sections
7material families
12review claims
18secondary benchmarks
17cited studies
5research gaps

Review scope

Review graphdiyne-based photocatalysts for hydrogen evolution, with emphasis on graphdiyne structural properties, band-gap tunability, heterojunction design, charge separation, and representative photocatalyst families.

Coverage
1972–2024
Category
Core Transport Physics
Material scope
Graphdiyne and graphyne carbon materials · Hydrogen-substituted graphdiyne · Graphdiyne/titanium or perovskite photocatalysts · Graphdiyne/metal oxide heterojunctions · Graphdiyne/layered double hydroxide composites · Graphdiyne/metal-organic framework and PBA-derived composites · Graphdiyne with other semiconductors such as Cu2O and C3N4
Transport scope
Charge-carrier mobility in sp/sp2 graphdiyne networks · Band-gap tuning and band alignment · Interfacial electron and hole separation · S-scheme, Z-scheme, Type II and p-n heterojunction charge-transfer mechanisms · Electron capture, electron storage and built-in electric-field interpretations
Application scope
Photocatalytic hydrogen evolution · Solar water splitting · Photocatalyst design for clean hydrogen production
Explicit exclusions
Primary experimental recipes beyond conceptual synthesis strategies · Full photocatalysis literature unrelated to graphdiyne · Primary-data extraction of every plotted value or reference
Source
1 · Abstract
Evidence role
Context, taxonomy and secondary benchmarking

Section map

The review’s argument is preserved as a navigable set of section summaries.

Application of graphdiyne in photocatalytic hydrogen evolution

3-7

Organises graphdiyne photocatalysts by host family: titanium/perovskite systems, metal oxides, hydrotalcite LDHs, MOFs/PBA-derived materials, and other semiconductors.

Relevance: Core · 3 · 3. Application of graphdiyne in photocatalytic hydrogen evolution

Adjustable band structure

2-3

Reviews direct band-gap estimates, Dirac-cone-like behaviour, and H-substitution as a route to widen the band gap and support Type II TiO2 charge separation.

Relevance: Core · 2 · 2.1. Adjustable band structure · Fig. 2

Conclusion and perspectives

7

Summarises application potential and lists future needs around low-cost non-toxic catalysts, heterojunction charge separation, GDY synthesis control, band-gap adjustment and combined theory/experiment.

Relevance: Core · 7 · 4. Conclusion and perspectives

Introduction

1-2

Frames photocatalytic water splitting, limitations of common oxide and sulfide photocatalysts, and the emergence of graphdiyne as an sp/sp2 carbon allotrope with porosity and active alkyne units.

Relevance: Core · 1 · Introduction

Properties of graphdiyne

2-3

Describes GDY bonding, charge mobility, porous structure, active sites, and the role of hydrogen substitution in modifying band structure and carrier separation.

Relevance: Core · 2 · 2. Properties of graphdiyne

Taxonomies

Classification systems are attributed to this review and are not treated as a global material registry.

Interfacial Transport Mechanism Invoked For GDY Composites

Heterojunction charge-transfer architectures

The review interprets performance gains largely through interfacial architectures designed to separate photogenerated charges while retaining redox ability.

Categories: Type II heterojunction · S-scheme heterojunction · double S-scheme heterojunction · Z-scheme heterojunction · p-n heterojunction · parallel double S-scheme heterojunction

5 · 3.3. Hydrotalcite based photocatalysts based on graphdiyne · Fig. 5E

Strategies To Tune Band Alignment And Interfacial Charge TransportAuthor-proposed

Design levers for GDY photocatalysts

The outlook condenses design levers into synthesis control, band-gap adjustment and mechanistic coupling between theory and experiment.

Categories: chemical doping or substitution · strong interfacial chemical bonding · morphology control · heterojunction construction · theory-guided mechanism study

7 · 4. Conclusion and perspectives

Intrinsic Material Features Linked To Photocatalytic Function

Graphdiyne structural features relevant to transport

The review links GDY's bonding and pore structure to electron mobility, diffusion, doping/induction sites and catalyst stability.

Categories: sp/sp2 co-hybridised carbon network · diacetylene bonds · uneven charge distribution · porous structure for mass transfer · surface triple-bond active sites

2 · 2. Properties of graphdiyne

Photocatalyst Family Modified By Or Coupled To GraphdiyneAuthor-proposed

Graphdiyne photocatalyst host-family taxonomy

The review's main organisational framework classifies GDY photocatalysts by the semiconductor family or porous host with which GDY is combined.

Categories: titanium/perovskite based photocatalysts · metal oxide photocatalysts · hydrotalcite or layered double hydroxide photocatalysts · metal-organic framework photocatalysts · other semiconductor photocatalysts

1 · Abstract

Functional Sequence For Photocatalytic Hydrogen Evolution

Three-step photocatalytic water decomposition process

The review uses the standard three-step photocatalysis sequence to motivate why light absorption, migration/separation and redox utilisation all matter.

Categories: light excitation generates electrons and holes · charge carriers separate and migrate to the catalyst surface · electrons and holes are consumed by reduction and oxidation reactions

3 · 3. Application of graphdiyne in photocatalytic hydrogen evolution

Material families

Review-defined families retain their representative materials and conduction descriptions.

Graphdiyne and graphyne carbon networks

Predominantly Two-Dimensional Sheets; Also Nanoscale And Three-Dimensional Cage Forms.

Carbon allotropes based on conjugated sp/sp2 networks containing benzene rings and acetylenic linkages.

Conduction: The review emphasises high charge-carrier mobility, uneven charge distribution from diacetylene bonds, and rapid electron migration through integrated GDY networks.

Representative materials: GDY · gamma-GY · nanoscale graphdiyne · three-dimensional graphdiyne cages

Nodes / linkers: Not specified · diacetylene bonds · benzene rings · alkyne units

2 · 2. Properties of graphdiyne

Hydrogen-substituted graphdiyne

Two-Dimensional Carbon Layer Used As A Transport And Band-Alignment Component.

GDY modified by H substitution to widen the electronic band gap and adjust band-edge positions for heterojunction construction.

Conduction: H substitution increases the band gap and improves CB/VB positioning, but the review notes that reduced conjugation affects charge-carrier mobility.

Representative materials: H-GDY · H-GDY/TiO2

Nodes / linkers: Not specified · hydrogen-substituted benzene-ring positions · sp/sp2 carbon network

2 · 2.1. Adjustable band structure · Fig. 2

Hydrotalcite and layered double hydroxide photocatalysts based on graphdiyne

Layered Two-Dimensional LDHs With Nanorod Or Nanoflower Morphologies.

Layered double hydroxide photocatalysts combined with GDY/CuI units and morphology control.

Conduction: GDY is interpreted as improving catalyst stability and conductivity, while LDH morphology supplies anchor points and reaction sites.

Representative materials: NiCoLDH/CuI/GDY · CuI-GDY/NiMn(LDHs)

Nodes / linkers: Ni · Co · Mn · Cu · graphdiyne · CuI-GDY

5 · 3.3. Hydrotalcite based photocatalysts based on graphdiyne · Fig. 5

Metal oxide photocatalysts based on graphdiyne

0D/2D And Nanosheet Heterostructures, Including Quantum-Dot-On-GDY Assemblies.

Transition-metal oxides coupled with GDY, graphyne or CuI/GDY components to improve light absorption, charge transfer and active-site exposure.

Conduction: The review presents GDY as a porous electron-transfer support that improves charge separation, dispersion and redox ability in oxide heterojunctions.

Representative materials: Co3O4/GDY · GDY/CuI/NiO · Co3O4 quantum dots/GDY · gamma-GY/CuMoO4

Nodes / linkers: Co · Ni · Cu · Mo · graphdiyne · gamma-graphyne

4 · 3.2. Metal oxide photocatalyst based on graphdiyne

MOF and Prussian-blue-analogue-derived photocatalysts based on graphdiyne

Porous Frameworks And Hollow Nanocages Coupled To GDY-Rich Layers.

Porous MOF or PBA-derived hosts coupled with CuI-GDY or GDY wrapping to create active porous heterojunction photocatalysts.

Conduction: The review highlights built-in electric fields from work-function differences and GDY as an electron-rich capture and conduction layer.

Representative materials: CuI-GDY/Ni-MOF · CGN-20 · GDY/NiCo2O4 nanocages

Nodes / linkers: Ni · Co · Cu · MOF ligands · cyanide ligands in PBAs · graphdiyne

6 · 3.4. Metal organic skeleton photocatalysts based on graphdiyne · Fig. 6

Other semiconductor heterojunctions based on graphdiyne

Nanocage And Surface-Grown Heterojunctions.

GDY combined with non-oxide semiconductor systems such as Cu2O and C3N4 to build cascaded or complete heterojunctions.

Conduction: GDY is described as an electron bridge between light-harvesting semiconductors and as a loading layer that improves light capture.

Representative materials: CuCo2O4/GDY/Cu2O · GDY@C3N4

Nodes / linkers: Cu · Co · graphdiyne · C3N4

7 · 3.5. Other types of semiconductors based on graphdiyne · Fig. 7

Titanium and perovskite photocatalysts based on graphdiyne

Heterostructures Combining Nanorods, Perovskite Solids And GDY Layers.

Perovskite or titanium-containing semiconductors combined with GDY-derived components to reduce recombination and improve hydrogen evolution.

Conduction: GDY or CuI-GD acts as electron acceptor, electron bridge or band-alignment layer to promote interfacial carrier separation.

Representative materials: NiTiO3/CuI-GD · CoTiO3/GDY · H-GDY/TiO2

Nodes / linkers: Ti · Ni · Co · Cu · graphdiyne · CuI-GD hybrid

4 · 3.1. Titanium based photocatalyst based on graphdiyne · Fig. 3

Synthesis strategies

Review-level synthesis principles remain separate from primary-study recipes.

Hierarchical tandem nanocage double Z-scheme design

Use ultrathin GDY nanosheets as bridges between light-harvesting semiconductors in cascaded nanocage structures.

Claimed effects: GDY serves as an electron bridge between semiconductors and supports high hydrogen-evolution activity.

Controlling variables: liquid-liquid interface GDY nanosheets · calcination-derived nanocages · multi-level cascade structure

Representative materials: CuCo2O4/GDY/Cu2O

Caveat: The review reports this as one example under other semiconductors rather than as a full nanocage design taxonomy.

7 · 3.5. Other types of semiconductors based on graphdiyne · Fig. 7A

CuI-GD hybrid anchoring on titanium perovskite nanorods

Embed CuI into layered graphdiyne and anchor the hybrid on NiTiO3 to build a ternary S-scheme system.

Claimed effects: The thin GD layer acts as an electron acceptor, while CuI-GD improves system redox ability and hydrogen evolution.

Controlling variables: CuI embedding into layered GD · physical anchoring on NiTiO3 · distribution of CuI-GD on nanorods

Representative materials: NiTiO3/CuI-GD

Caveat: Review reports performance but does not independently resolve the primary charge-transfer mechanism.

4 · 3.1. Titanium based photocatalyst based on graphdiyne

Deprotection-free in-situ GDY growth on C3N4

Grow graphdiyne on C3N4 by a non-deprotection approach to create a complete GDY@C3N4 heterojunction.

Claimed effects: GDY loading enhances light-radiation capture and improves hydrogen evolution relative to pure C3N4.

Controlling variables: surface growth on C3N4 · GDY loading · heterojunction completeness

Representative materials: GDY@C3N4

Caveat: The review gives only a concise performance comparison; detailed mechanism should be checked in the original paper.

7 · 3.5. Other types of semiconductors based on graphdiyne · Fig. 7B

S-scheme gamma-graphyne/CuMoO4 composite assembly

Mechanically prepare a gamma-GY carbon material and couple it with CuMoO4 to form a binary S-scheme composite.

Claimed effects: Large-pore gamma-GY provides loading positions and receives photogenerated electrons from CuMoO4 under illumination.

Controlling variables: pore shape of gamma-GY · CuMoO4 particle loading · interfacial electron-transfer pathway

Representative materials: gamma-GY/CuMoO4

Caveat: Mechanism is inferred from in-situ XPS peak shifts as summarised by the review.

5 · 3.2. Metal oxide photocatalyst based on graphdiyne · Fig. 4

Band-gap tuning by hydrogen substitution

Replace or substitute GDY with hydrogenated positions to widen the band gap and improve CB/VB alignment with TiO2.

Claimed effects: Wider band gap and more favourable interfacial carrier separation; caveat that limited conjugation can reduce mobility.

Controlling variables: degree and position of H substitution · retention of pi-conjugated structure · band-edge alignment with partner semiconductor

Representative materials: H-GDY · H-GDY/TiO2

Caveat: The review states that increased gap and limited conjugation affect carrier mobility, so band tuning is not cost-free.

2 · 2.1. Adjustable band structure · Fig. 2

LDH morphology control in double S-scheme heterojunctions

Construct GDY-CuI binary units and combine them with NiCoLDH morphologies to form double S-scheme heterojunctions.

Claimed effects: Nanorod LDH morphology is described as more stable and provides more active sites than nanoflowers, enhancing electron transport and redox ability.

Controlling variables: LDH morphology · anchor-point density · GDY-CuI contact interface

Representative materials: NiCoLDH/CuI/GDY · NiCoLDH-R · NiCoLDH-F

Caveat: The review reports morphology comparison at a high level without reproducing a full synthesis-structure matrix.

5 · 3.3. Hydrotalcite based photocatalysts based on graphdiyne · Fig. 5

CuI-GDY immobilisation on MOFs with work-function-driven fields

Fix CuI-GDY on Ni-MOF to reduce GDY aggregation and exploit Fermi-level differences that establish a built-in electric field.

Claimed effects: GDY acts as an electron-rich polymer layer with capture and conduction capability; built-in fields improve separation of photogenerated electrons and holes.

Controlling variables: CuI-GDY loading · MOF porosity · work-function differences · GDY aggregation

Representative materials: CuI-GDY/Ni-MOF · CGN-20

Caveat: Work-function values are review-reported from the cited DFT/experimental study and should not be treated as newly calculated here.

6 · 3.4. Metal organic skeleton photocatalysts based on graphdiyne · Fig. 6

GDY wrapping on PBA-derived hollow nanocages

Prepare GDY and introduce it onto hollow NiCo2O4 nanocages derived from Prussian blue analogue templates.

Claimed effects: p-n heterojunction construction separates carriers; hollow structures enhance light utilisation and potential intracavity reactions.

Controlling variables: PBA-derived hollow structure · GDY wrapping · crystalline/amorphous interface

Representative materials: GDY/NiCo2O4 nanocages

Caveat: The review's PBA discussion is selective and not a general PBA photocatalyst survey.

6 · 3.4. Metal organic skeleton photocatalysts based on graphdiyne

Strong chemical-bond coupling at S-scheme interfaces

Use in-situ high-temperature calcination to form Co-C bonds between organic GDY and inorganic CoTiO3.

Claimed effects: Co-C bonding is interpreted as a high-speed electron-transfer bridge that reduces recombination and improves hydrogen evolution.

Controlling variables: calcination conditions · formation of Co-C interfacial bonds · GDY/CoTiO3 composition

Representative materials: 20%-GCTO · CoTiO3/GDY

Caveat: Secondary review interpretation relies on XPS shifts and photoluminescence evidence reported in the primary study.

4 · 3.1. Titanium based photocatalyst based on graphdiyne · Fig. 3

0D/2D quantum-dot-on-GDY heterojunction construction

Couple Co3O4 or oxide quantum dots with two-dimensional porous GDY to form p-n or Z-scheme heterojunctions.

Claimed effects: Porous GDY anchors quantum dots, limits aggregation, exposes active sites and promotes charge separation.

Controlling variables: quantum-dot dispersion · GDY porous surface · electrostatic self-assembly

Representative materials: Co3O4/GDY · Co3O4 quantum dots/GDY

Caveat: The review groups different oxide/GDY architectures under a broad metal-oxide strategy, so primary papers remain necessary for detailed comparison.

4 · 3.2. Metal oxide photocatalyst based on graphdiyne

Review claims

These are the review authors’ synthesis, not newly measured results.

Consensus SummaryHigh supportTransport Mechanism

Suitable band matching at conduction and valence edges is treated as central to maximising interface charge separation in graphdiyne photocatalysts.

Evidence basis: review_reasoning

Caveat: The review does not quantify a universal optimal offset.

2 · 2.1. Adjustable band structure

Consensus SummaryHigh supportTransport Mechanism

Across the review, hydrogen-evolution efficiency is linked to light capture, electron-hole separation, carrier migration and electron utilisation.

Evidence basis: review_reasoning

Caveat: This is a general photocatalysis framing applied to GDY systems.

3 · 3. Application of graphdiyne in photocatalytic hydrogen evolution

Author InterpretationMedium supportCaveat

Even with improved heterojunctions, the review warns that Coulomb fields can still prevent some photogenerated charges from separating.

Evidence basis: review_reasoning

Caveat: The review proposes high charge-carrier capacity of GDY as a possible route, not a settled solution.

7 · 4. Conclusion and perspectives

Author InterpretationMedium supportStructure Property Link

Porous two-dimensional GDY can anchor oxide quantum dots, reduce aggregation and increase active sites, enabling improved charge transfer in Z-scheme or p-n structures.

Evidence basis: multi_reference

Caveat: The review does not normalise performance across different testing conditions.

4 · 3.2. Metal oxide photocatalyst based on graphdiyne

Author InterpretationHigh supportStructure Property Link

The review presents GDY's sp/sp2 network, diacetylene bonds and porosity as the structural basis for high carrier mobility, mass transfer and catalytic-site clarity.

Evidence basis: multi_reference

Caveat: The statement is a review-level synthesis, not a new mobility measurement.

2 · 2. Properties of graphdiyne

Author InterpretationHigh supportStructure Property Link

Hydrogen substitution in GDY can widen the band gap and improve TiO2 heterojunction band positioning, but reduced conjugation may impair carrier mobility.

Evidence basis: single_reference

Caveat: The review frames this as a design tradeoff rather than an unconditional improvement.

3 · 2.1. Adjustable band structure · Fig. 2

Author InterpretationMedium supportStructure Property Link

Hollow PBA-derived NiCo2O4/GDY nanocages are interpreted as improving light utilisation through multiple internal reflections and possible intracavity reactions.

Evidence basis: single_reference

Caveat: The review does not provide independent optical modelling.

6 · 3.4. Metal organic skeleton photocatalysts based on graphdiyne

Author InterpretationMedium supportStructure Property Link

For LDH composites, GDY conductivity is presented as a way to overcome slow electron transfer and low electron-hole separation rates.

Evidence basis: single_reference

Caveat: The review reports a material-specific example rather than a universal LDH rule.

5 · 3.3. Hydrotalcite based photocatalysts based on graphdiyne

Author InterpretationMedium supportTransport Mechanism

In CuI-GDY/Ni-MOF, work-function differences are interpreted as producing electron flow and a built-in electric field that enhances carrier separation.

Evidence basis: single_reference

Caveat: Values and mechanism are secondary-source summaries of the cited study's DFT and experimental results.

6 · 3.4. Metal organic skeleton photocatalysts based on graphdiyne · Fig. 6

Consensus SummaryHigh supportCaveat

Transition-metal oxides are attractive for cost and stability but broad band gaps, lower carrier mobility and high recombination limit hydrogen evolution.

Evidence basis: multi_reference

Caveat: The review gives a broad material-family limitation, not a material-specific quantitative ranking.

4 · 3.2. Metal oxide photocatalyst based on graphdiyne

Author InterpretationMedium supportTransport Mechanism

S-scheme heterojunctions are repeatedly presented as improving photogenerated-carrier separation while maintaining strong photoreduction or redox ability.

Evidence basis: multi_reference

Caveat: The conclusion is generalised from several examples, each requiring primary-paper validation.

5 · 3.2. Metal oxide photocatalyst based on graphdiyne · Fig. 4

Author InterpretationMedium supportTransport Mechanism

Strong Co-C chemical bonding in CoTiO3/GDY is interpreted as creating a high-speed interfacial electron-transfer bridge in an S-scheme heterojunction.

Evidence basis: single_reference

Caveat: The conclusion depends on secondary interpretation of XPS, PL and band-diagram evidence from the cited paper.

4 · 3.1. Titanium based photocatalyst based on graphdiyne · Fig. 3

Secondary benchmarks

Every row remains visibly secondary and links to a primary dossier only where the mapping is verified.

MaterialPropertyReported valueContext and qualityPrimary evidenceReview source
SecondaryCGN-20Apparent quantum efficiency0.80% at 475 nm475 nm irradiation
Text · Exact Reported
No verified corpus mapping6 · 3.4. Metal organic skeleton photocatalysts based on graphdiyne · Fig. 6C
SecondaryCGN-20 / CuI-GDY modified Ni-MOFHydrogen evolution rate1553.60 umol h-1 g-1CuI-GDY modified Ni-MOF, highest rate in Fig. 6A
Text · Exact Reported
No verified corpus mapping6 · 3.4. Metal organic skeleton photocatalysts based on graphdiyne · Fig. 6A
SecondaryCo3O4/GDYHydrogen evolution activity2336.6 umol g-1 h-10D/2D p-n heterojunction by combining graphdiyne with Co3O4
Text · Exact Reported
No verified corpus mapping4 · 3.2. Metal oxide photocatalyst based on graphdiyne
SecondaryCo3O4 quantum dot/GDYHydrogen evolution performance1500.85 umol h-1 g-1Co3O4 quantum dot/two-dimensional GDY Z-scheme heterojunction
Text · Exact Reported
No verified corpus mapping4 · 3.2. Metal oxide photocatalyst based on graphdiyne
SecondaryCuCo2O4/GDY/Cu2OHydrogen evolution activity9617 umol h-1 g-1Hierarchical tandem double Z-scheme heterojunction
Text · Rounded Reported
No verified corpus mapping7 · 3.5. Other types of semiconductors based on graphdiyne · Fig. 7A
SecondaryCuI-GDY/NiMn(LDHs)Hydrogen evolution performance1094.6 umol g-1 h-1Composite catalysts prepared by solvothermal method
Text · Exact Reported
No verified corpus mapping5 · 3.3. Hydrotalcite based photocatalysts based on graphdiyne
SecondaryCuIWork function4.62 eVDFT theory calculations; Fig. 6D-I comparison
Text · Exact Reported
No verified corpus mapping6 · 3.4. Metal organic skeleton photocatalysts based on graphdiyne · Fig. 6D-I
Secondarygamma-GY/CuMoO4Hydrogen productionup to 197 umol within 5 hComposite catalyst over 5 h
Text · Rounded Reported
No verified corpus mapping4 · 3.2. Metal oxide photocatalyst based on graphdiyne · Fig. 4
Secondary20%-GCTOPhotocatalytic hydrogen evolution performance3.5 mmol/gIn-situ calcined GDY/CoTiO3 composite; review reports comparison to CoTiO3 and GDY
Text · Rounded Reported
No verified corpus mapping4 · 3.1. Titanium based photocatalyst based on graphdiyne · Fig. 3C
SecondaryGraphdiyneTheoretical direct band gapapproximately 1.0 eVFirst Brillouin zone; review-reported theoretical value
Text · Approximate
No verified corpus mapping2 · 2.1. Adjustable band structure
SecondaryGDY@C3N4Hydrogen evolution activity798 umol g-1 h-1Optimised complete GDY@C3N4 heterojunction
Text · Rounded Reported
No verified corpus mapping7 · 3.5. Other types of semiconductors based on graphdiyne · Fig. 7B
SecondaryGDY/CuI/NiOPhotocatalytic activity5955 umol g-1Ternary hybrid GDY/CuI/NiO photocatalyst; rate unit not fully specified in review text
Text · Rounded Reported
No verified corpus mapping4 · 3.2. Metal oxide photocatalyst based on graphdiyne
SecondaryGDYWork function5.34 eVDFT theory calculations; Fig. 6D-I comparison
Text · Exact Reported
No verified corpus mapping6 · 3.4. Metal organic skeleton photocatalysts based on graphdiyne · Fig. 6D-I
SecondaryH-GDYDFT band gap after hydrogenation2.4 eVDFT theory calculations for hydrogenation reaction of graphdiyne
Text · Exact Reported
No verified corpus mapping2 · 2.1. Adjustable band structure · Fig. 2
SecondaryNi-MOFWork function3.50 eVDFT theory calculations; Fig. 6D-I comparison
Text · Exact Reported
No verified corpus mapping6 · 3.4. Metal organic skeleton photocatalysts based on graphdiyne · Fig. 6D-I
SecondaryGDY/NiCo2O4 nanocagesPhotocatalytic activity4.84 mmol g-1 h-1Hollow NiCo2O4 nanocages derived from PBA and wrapped with GDY
Text · Exact Reported
No verified corpus mapping6 · 3.4. Metal organic skeleton photocatalysts based on graphdiyne
SecondaryNiCoLDH/CuI/GDYHydrogen evolution activity12.09 umol h-1Double S-scheme heterojunction catalyst; morphology-controlled NiCoLDH
Text · Exact Reported
No verified corpus mapping5 · 3.3. Hydrotalcite based photocatalysts based on graphdiyne · Fig. 5E
SecondaryNiTiO3/CuI-GDHydrogen evolution activity509.03 umol h-1 g-1Under light irradiation; review-reported activity
Text · Exact Reported
No verified corpus mapping4 · 3.1. Titanium based photocatalyst based on graphdiyne

Research gaps

Open questions are presented as review-author priorities, not conclusions from the primary database.

Band alignment limitations from narrow GDY band gap

Medium

Narrow GDY band gap can hinder alignment with other semiconductors.

Proposed direction: Use chemical doping or substitution to tune GDY band gap for matched band alignment and heterojunction construction.

7 · 4. Conclusion and perspectives

Incomplete charge separation in heterojunctions

Medium

Even improved S-scheme heterojunctions may leave some charges unseparated because of Coulomb fields.

Proposed direction: Investigate whether GDY's high charge-carrier capacity can mitigate Coulomb-field-limited separation.

7 · 4. Conclusion and perspectives

Difficult and variable GDY preparation

High

The review states that GDY preparation remains difficult and that catalytic performance varies greatly with synthesis method and sp-hybridisation degree.

Proposed direction: Find optimal synthesis strategies that control sp hybridisation and reproducible photocatalytic performance.

7 · 4. Conclusion and perspectives

Scalable sustainable photocatalysts

High

The review identifies a need for efficient, non-toxic, recyclable and low-cost graphdiyne-based photocatalysts as hydrogen technologies move toward industrialisation.

Proposed direction: Develop sustainable GDY photocatalysts with cost, toxicity and recycling criteria considered alongside activity.

7 · 4. Conclusion and perspectives

Mechanistic understanding

Medium

Mechanisms of photocatalytic hydrogen evolution and interactions between photocatalysts need deeper exploration.

Proposed direction: Combine theoretical analysis and experimental research to study interfacial interactions and accelerate photocatalyst development.

7 · 4. Conclusion and perspectives

Cited-study map

Mappings show which printed review references have a verified counterpart in the frozen primary corpus.

Show 17 cited-study records
ReferenceStudyRole and contextCorpus mapping
Cao et al. 20212021Graphdiyne (g-CnH2n-2) coupled with Co3O4 formed a Zero-dimensional/two-dimensional p-n heterojunction for efficient hydrogen evolutionmetal_oxide · transport_benchmark · heterojunctionUsed for a 0D/2D Co3O4/GDY p-n heterojunction benchmark.Unmapped
Jin et al. 20222022Graphdiyne based GDY/CuI/NiO parallel double S-scheme heterojunction for efficient photocatalytic hydrogen evolutionmetal_oxide · transport_benchmark · double_s_schemeCited for ternary GDY/CuI/NiO hybrid with high photocatalytic activity and stability.Unmapped
Lan et al. 20212021Efficient hydrogen evolution on nanoscale graphdiyneproperty_context · hydrogen_evolutionCited for graphdiyne's active alkyne units and latent photocatalyst potential.Unmapped
Li et al. 20102010Architecture of graphdiyne nanoscale filmshistorical_origin · graphdiyne_synthesisCited for the 2010 preparation of graphdiyne thin films by cross-coupling on Cu foil.Unmapped
Li et al. 2021a2021Tuning the electronic bandgap of graphdiyne by H-substitution to promote interfacial charge carrier separation for enhanced photocatalytic hydrogen productionband_structure · transport_mechanism · secondary_benchmarkKey cited study for H-substitution widening GDY band gap and promoting Type II TiO2 interfacial charge separation.Unmapped
Li et al. 2023d2023Enhanced kinetics of photocatalytic hydrogen evolution by interfacial Co-C bonded strongly coupled S-scheme inorganic perovskite/organic graphdiyne (CnH2n-2) heterojunctioninterfacial_bonding · transport_benchmark · synthesis_strategyCited for in-situ calcination forming Co-C bonds and improving S-scheme electron transfer in CoTiO3/GDY.Unmapped
Li and Jin 20232023Rationally engineered avtive sites for efficient and durable hydrogen production over gamma-graphyne assembly CuMoO4 S-scheme heterojunctionmetal_oxide · s_scheme · transport_benchmarkCited for gamma-GY/CuMoO4 S-scheme charge-transfer interpretation using in-situ XPS.Unmapped
Liu and Jin 20232023Hydrogen production by graphdiyne (CnH2n-2)-based graphdiyne/CuI/NiMn(LDHs) double S-scheme heterojunctionsldh · conductivity · transport_benchmarkCited for LDH/GDY conductivity improving electron-hole separation and hydrogen evolution.Unmapped
Tan et al. 20122012First-principles study of hydrogenated graphyne and its family: stable configurations and electronic structuresband_structure · secondary_benchmarkCited in the band-structure discussion for the natural band gap arising from non-uniform pi bonds in sp-sp2 networks.Unmapped
Wang et al. 20222022Synthesis of hierarchical tandem double Z-scheme heterojunctions for robust photocatalytic H2 generationother_semiconductor · double_z_scheme · transport_benchmarkCited for hierarchical tandem CuCo2O4/GDY/Cu2O double Z-scheme nanocages.Unmapped
Wang et al. 20232023In situ construction of graphdiyne based heterojunctions by a deprotection-free approach for photocatalytic hydrogen generationother_semiconductor · c3n4 · transport_benchmarkCited for deprotection-free growth of GDY on C3N4 and enhanced light capture.Unmapped
Wu et al. 20232023Graphdiyne (g-CnH2n-2) boosting electron transfer over rational design and construction of CuI/Ni-MOF photocatalyst for efficient hydrogen evolutionmof · work_function · transport_benchmarkKey MOF example for CuI-GDY/Ni-MOF activity, AQE and work-function-driven built-in electric field interpretation.Unmapped
Xiang et al. 20222022Rational construction of Z-scheme charge transfer based on 2D graphdiyne (g-CnH2n-2) coupling with amorphous Co3O4 quantum dots for efficient photocatalytic hydrogen generationmetal_oxide · z_scheme · transport_benchmarkCited for a Z-scheme Co3O4 quantum dot/GDY heterojunction in which GDY disperses and anchors quantum dots.Unmapped
Xie et al. 2023b2023Enwrapping graphdiyne (g-CnH2n-2) on hollow NiCo2O4 nanocages derived from a Prussian blue analogue as a p-n heterojunction for highly efficient photocatalytic hydrogen evolutionpba_derived · p_n_heterojunction · transport_benchmarkCited for GDY wrapping of hollow PBA-derived NiCo2O4 nanocages and p-n heterojunction carrier separation.Unmapped
Yan et al. 20212021Graphdiyne based ternary GD-CuI-NiTiO3 S-scheme heterjunction photocatalyst for hydrogen evolutiontitanium_perovskite · transport_benchmark · synthesis_strategyUsed for ternary GD-CuI-NiTiO3 S-scheme photocatalyst where GD acts as electron acceptor.Unmapped
Zhang et al. 20232023Graphdiyne (CnH2n-2)-Based NiCo LDH - graphdiyne - CuI double S-scheme heterojunction for efficient photocatalytic hydrogen productionldh · double_s_scheme · transport_benchmarkCited for morphology-controlled NiCoLDH/CuI/GDY double S-scheme heterojunctions.Unmapped
Zhao et al. 20222022Layer-by-layer covalent bond coupling way making graphdiyne cagesstructure_context · electron_migrationCited for 3D GDY cage structures providing electron-migration channels.Unmapped