Yao Y., Ma Z., Ma Z. et al. · Separation and Purification Technology · 2025 · 128091
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
Fe2Ni1-NC-900 shows useful practical durability in a fixed-bed setup, but batch recycling activity decreases and can be partially restored by N2 annealing.
Caveat: Used-catalyst BET and some stability figures require full SI tables/figures.
7-8 · 3.4 · Figure 4e-f · Linked to 6 structured results
The provided SI text is incomplete, so SI-only pore-size, XPS table, additional quenching/COD figure data and degradation-pathway table values cannot be fully extracted.
Caveat: The local SI text includes captions and table titles but not the underlying figure/table bodies; network fetching was not permitted.
Supporting Information captions and table headings · Figures S1-S9; Tables S1-S3 · Linked to 2 structured results
The dual Fe/Ni-Nx site arrangement in Fe2Ni1-NC-900 gives higher Orange II/PI activity than metal-free NC-900 and single-metal Fe-NC-900 or Ni-NC-900 controls.
Caveat: Application data are catalytic degradation values rather than intrinsic conductivity values.
5 · 3.2 · Figure 3c · Linked to 5 structured results
The high specific surface area of Fe2Ni1-NC-900 is presented as exposing catalytic sites and accelerating substrate/product transfer.
Caveat: Detailed pore-size and textural table values are in missing Table S1.
4 · 3.1 · Figure 1d; Table S1 · Linked to 3 structured results
Fe and Ni are introduced into ZIF-8-derived precursors and then transformed by single-step thermal activation into Fe/Ni-Nx atomic sites in N-doped porous carbon.
Caveat: The exact Fe&Ni-ZnO precursor volumes for the target ratio are not fully specified in the main text, and the provided SI text lacks the needed figure/table bodies.
10-11 · Conclusions · Figure 7 · Linked to 4 structured results
Fe(II)/Fe(III) and Ni(III)/Ni(II) redox cycling is proposed to facilitate electron transport from Fe to Ni and enhance PI utilisation.
Caveat: The relevant detailed XPS Figure S7 and Table S2 are missing locally; values quoted in the main text were extracted.
10 · 3.7 · Figure S7 · Linked to 4 structured results
The paper attributes organic-molecule adsorption and electron-transfer activation to the conductive carbon skeleton of FeNi-NC.
Caveat: No standalone bulk conductivity value is reported; conductivity is inferred from electrochemical response, EIS and mechanistic discussion.
9-10 · 3.6; 3.7 · Figures 6-7 · Linked to 5 structured results
Mediated electron transfer through Fe2Ni1-NC-900/PI* complexes is proposed as the primary non-radical oxidation pathway.
Caveat: The i-t and EIS evidence is qualitative in the main text; no numeric current or Rct values are reported.
1; 9 · Abstract; 3.6 · Figure 6 · Linked to 6 structured results
Singlet oxygen participates in Orange II degradation, but quenching results show it is not the sole active pathway.
Caveat: Underlying Figure S6 values require the full SI, though key numbers are quoted in the main text.
9 · 3.5 · Figure 5d; Figure S6e · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Fe-NC single-metal control | Fe species in N-doped carbonFe-Nx sites · Derived from ZIF-8 precursor | 3D · DerivedMOF-derived porous carbon single-metal control prepared from Fe-ZnO/ZIF-8. | 2 · 2.1.4 Synthesis of FeNi-NC, M-NC, and NC · Figure 1 |
| FeNi-NC diatomic catalyst | Fe/Ni species anchored in N-doped porous carbon; Fe2Ni1-NC-900 target compositionAtomically dispersed adjacent Fe-Nx and Ni-Nx sites · Derived from ZIF-8 2-methylimidazole carbon/nitrogen source | 3D · DerivedMOF-derived N-doped porous carbon bearing Fe/Ni dual single atomic sites; no metal alloy or carbide phase detected in the carbon matrix. | 1-2 · Abstract; Introduction · Figure 1 |
| ZnO and M-ZnO nanoparticles | ZnO or M-doped ZnO, M = Fe or NiZn with Fe or Ni dopant species | 0D · UnknownMetal-doped ZnO nanoparticle intermediates used to assemble M-ZnO/ZIF-8 precursors. | 2 · 2.1.2 Preparation of ZnO and M-ZnO nanoparticles |
| ZnO/ZIF-8 and M-ZnO/ZIF-8 precursorsBrowse family: ZIF-8 / Zn(mIm)₂ | ZnO/ZIF-8, Fe-ZnO/ZIF-8, Ni-ZnO/ZIF-8 or Fe&Ni-ZnO/ZIF-8Zn nodes in ZIF-8 plus ZnO, Fe-ZnO and/or Ni-ZnO nanoparticles · 2-methylimidazole in ZIF-8 | 3D · CompositeZIF-8-derived composite precursors; Fe-ZnO/ZIF-8 and Fe&Ni-ZnO/ZIF-8 retain the ZIF-8 structure according to the main text. | 2 · 2.1.3 Synthesis of ZnO/ZIF-8, M-ZnO/ZIF-8, and Fe&Ni-ZnO/ZIF-8 · Figure 1a; Figure S1a |
| NC metal-free control | N-doped carbonNo intentional transition-metal single sites · Derived from ZIF-8 precursor | 3D · DerivedMOF-derived metal-free N-doped porous carbon control prepared from ZnO/ZIF-8. | 2 · 2.1.4 Synthesis of FeNi-NC, M-NC, and NC · Figure 1 |
| Ni-NC single-metal control | Ni species in N-doped carbonNi-Nx sites · Derived from ZIF-8 precursor | 3D · DerivedMOF-derived porous carbon single-metal control prepared from Ni-ZnO/ZIF-8. | 2 · 2.1.4 Synthesis of FeNi-NC, M-NC, and NC · Figure 1 |
| ZIF-8Browse family: ZIF-8 / Zn(mIm)₂ | Zn(2-methylimidazolate)2 framework; empirical formula not statedZn nodes · 2-methylimidazole | 3D · PristineZinc-based zeolitic imidazolate framework used as the MOF precursor; described as a 3D precursor and observed as rhombic dodecahedral particles. | 2 · Introduction; 2.1.1 Preparation of ZIF-8 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Annealed used Fe2Ni1-NC-900research_0584__mat__mat_feni_nc | Powder · Target Sample · Derived Carbon | Used Fe2Ni1-NC-900 annealed for 2 h at 900 deg C in N2. | 8 · 3.4 Durability and practical application · Figure 4e |
| Fe1Ni1-NC-900research_0584__mat__mat_feni_nc | Powder · Target Sample · Derived Carbon | FeNi-NC ratio variant carbonised at 900 deg C; Fe-ZnO/ZIF-8 to Ni-ZnO/ZIF-8 precursor molar ratio 1.0. | 2; 5 · 2.1.4; 3.2 · Figure 3c |
| Fe1Ni2-NC-900research_0584__mat__mat_feni_nc | Powder · Target Sample · Derived Carbon | FeNi-NC ratio variant carbonised at 900 deg C; Fe-ZnO/ZIF-8 to Ni-ZnO/ZIF-8 precursor molar ratio 0.5. | 2; 5 · 2.1.4; 3.2 · Figure 3c |
| Fe2Ni1-NC-1000research_0584__mat__mat_feni_nc | Powder · Target Sample · Derived Carbon | Fe&Ni-ZnO/ZIF-8 carbonised at 1000 deg C for 2 h under N2. | 2; 5-6 · 2.1.4; 3.2 · Figure 3d |
| Fe2Ni1-NC-800research_0584__mat__mat_feni_nc | Powder · Target Sample · Derived Carbon | Fe&Ni-ZnO/ZIF-8 carbonised at 800 deg C for 2 h under N2. | 2; 5-6 · 2.1.4; 3.2 · Figure 3d |
| Fe2Ni1-NC-900research_0584__mat__mat_feni_nc | Powder · Target Sample · Derived Carbon | Fe&Ni-ZnO/ZIF-8 carbonised at 900 deg C for 2 h under N2. | 2; 5-6 · 2.1.4; 3.2 · Figures 1-3 |
| Fe2Ni1-NC-950research_0584__mat__mat_feni_nc | Powder · Target Sample · Derived Carbon | Fe&Ni-ZnO/ZIF-8 carbonised at 950 deg C for 2 h under N2. | 2; 5-6 · 2.1.4; 3.2 · Figure 3d |
| Fe2Ni1-NC-900 coated glassy carbon electroderesearch_0584__mat__mat_feni_nc | Electrode · Composite Sample · Composite | Fe2Ni1-NC-900 loaded on GCE for LSV, EIS and i-t electrochemical tests; ink/binder details are not given in the main text.glassy carbon electrode | 4; 9 · 2.3 Analytical methods; 3.6 · Figure 6 |
| Fe4Ni1-NC-900research_0584__mat__mat_feni_nc | Powder · Target Sample · Derived Carbon | FeNi-NC ratio variant carbonised at 900 deg C; Fe-ZnO/ZIF-8 to Ni-ZnO/ZIF-8 precursor molar ratio 4.0. | 2; 5 · 2.1.4; 3.2 · Figure 3c |
| Fe-NC-900research_0584__mat__mat_fe_nc | Powder · Pristine Control · Derived Carbon | Fe-ZnO/ZIF-8 carbonised at 900 deg C under N2. | 2; 5 · 2.1.4; 3.2 · Figures 1-3 |
| Fe-ZnO nanoparticle dispersionresearch_0584__mat__mat_m_zno_np | Unknown · Composite Component · Doped | Fe-doped ZnO nanoparticles dispersed in ethanol at 25 mg/mL after ethyl acetate addition, centrifugation and redispersion. | 2 · 2.1.2 |
| Fe-ZnO/ZIF-8 precursorresearch_0584__mat__mat_m_zno_zif8 | Powder · Pristine Control · Composite | ZIF-8 assembled with Fe-ZnO and ZnO nanoparticle dispersions and isolated by centrifugal drying. | 2; 4 · 2.1.3; 3.1 · Figure S1a; Figure S2b |
| Fe&Ni-ZnO/ZIF-8 precursorresearch_0584__mat__mat_m_zno_zif8 | Powder · Target Sample · Composite | ZIF-8 assembled with Fe&Ni-ZnO nanoparticle mixture, ultrasonicated and stirred for 14 h before centrifugal drying. | 2; 4 · 2.1.3; 3.1 · Figure 1a; Figure S2d |
| NC-900research_0584__mat__mat_nc | Powder · Pristine Control · Derived Carbon | ZnO/ZIF-8 carbonised at 900 deg C under N2. | 2; 5 · 2.1.4; 3.2 · Figures 1-3 |
| Ni-NC-900research_0584__mat__mat_ni_nc | Powder · Pristine Control · Derived Carbon | Ni-ZnO/ZIF-8 carbonised at 900 deg C under N2. | 2; 5 · 2.1.4; 3.2 · Figures 1-3 |
| Ni-ZnO nanoparticle dispersionresearch_0584__mat__mat_m_zno_np | Unknown · Composite Component · Doped | Ni-doped ZnO nanoparticles dispersed in ethanol at 20 mg/mL. | 2 · 2.1.2 |
| Ni-ZnO/ZIF-8 precursorresearch_0584__mat__mat_m_zno_zif8 | Powder · Pristine Control · Composite | ZIF-8 assembled with ZnO and Ni-ZnO nanoparticle dispersions and isolated by centrifugal drying. | 2; 4 · 2.1.3; 3.1 · Figure S1a; Figure S2c |
| Used Fe2Ni1-NC-900research_0584__mat__mat_feni_nc | Powder · Target Sample · Derived Carbon | Recovered after catalytic use, washed with ethanol and water, and dried at 60 deg C. | 4; 8; 10 · 2.2; 3.4; 3.7 · Figures 4e; S5; S7 |
| ZIF-8 precursorresearch_0584__mat__mat_zif8 | Powder · Pristine Control · Pristine Framework | White precipitate after methanol solvothermal synthesis, ethanol washing and overnight drying. | 2; 4 · 2.1.1; 3.1 · Figure S2a |
| ZnO nanoparticle dispersionresearch_0584__mat__mat_m_zno_np | Unknown · Composite Component · Unknown | ZnO nanoparticles dispersed in ethanol at 25 mg/mL, prepared without Fe acetate. | 2 · 2.1.2 |
| ZnO/ZIF-8 precursorresearch_0584__mat__mat_m_zno_zif8 | Powder · Pristine Control · Composite | ZIF-8 assembled with pure ZnO nanoparticles and isolated by centrifugal drying. | 2 · 2.1.3 · Figure S1a |