Wang T., Chu Y., Li X. et al. · Journal of the American Chemical Society · 2023 · 5342-5352
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.
The Na-ZSM-5 (9.8) sensor detects NH3 down to 77 ppb with high selectivity, humidity tolerance, and repeatability.
Caveat: Application metrics are for a high-temperature chemiresistive sensor, not room-temperature operation.
5348-5350 · Design and Characterization of Semiconducting Zeolite-Based Gas Sensors · Figure 3; Table S6 · Linked to 4 structured results
Semiconducting and NH3-sensing behaviour extends to Na-MTW zeolites, though Na-MTW (22) is reported as marginally worse than Na-ZSM-5 (9.8).
Caveat: Na-MTW evidence is mostly in supporting figures and less detailed than Na-ZSM-5.
5349 · Design and Characterization of Semiconducting Zeolite-Based Gas Sensors · Figure S38 · Linked to 3 structured results
The paper contains no first-hand conductive-MOF material; conductive MOFs are used only as comparator literature for ammonia chemiresistors.
Caveat: The database assignment is still extracted because the paper is tagged core_theory_transport and gives transport evidence relevant to porous frameworks.
5342 · Abstract
Lower framework Si/Al ratio and higher extra-framework Na+ content narrow the band gap and improve electronic conduction in Na-ZSM-5.
Caveat: Relationship is demonstrated over a limited set of Na-ZSM-5 compositions.
5347 · Semiconducting Characteristics Analyses · Figure 2a-c · Linked to 4 structured results
NH3 sensing is attributed to strong NH3 adsorption and electron transfer at extra-framework Na+ cations acting as Lewis acid sites.
Caveat: Mechanistic evidence combines in situ FTIR and DFT charge-density/Mulliken analysis.
5350 · Conclusions · Figure 4 · Linked to 4 structured results
The authors assign charge transport in electrically conductive Na-ZSM-5 to a band-like mechanism rather than only hopping-type transport.
Caveat: The claim relies on combined optical, I-V, photoresponse, and DFT evidence rather than direct carrier mobility measurement.
5350 · Conclusions · Linked to 4 structured results
Na-ZSM-5 zeolites behave as ultrawide-direct-band-gap semiconductors with temperature-dependent electronic conductivity and ultraviolet photoresponse.
Caveat: Conductivity is only up to approximately 10^-7 S/cm at high temperature; room-temperature conductivity remains limited.
5350 · Conclusions · Linked to 4 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| H-, Li-, and Cs-type ZSM-5 zeolites | cation-exchanged ZSM-5, Si/Al = 9.8none; H+, Li+, or Cs+ charge-compensating cations · none | 3D · PristineZSM-5 zeolite framework | 7-8 · Synthesis of H-type, Li-type, and Cs-type ZSM-5 zeolites |
| Na-MTW zeolite | Na-containing aluminosilicate MTW; Si/Al = 22, 30, 46none; extra-framework Na+ charge-compensating cations · none | 3D · PristineMTW zeolite framework | 5347 · Results and Discussion · Supporting Figures S25-S31 |
| Na-ZSM-5 zeolite | Na-containing aluminosilicate ZSM-5; Si/Al = 9.8, 19.5, 29.4, 38.0none; extra-framework Na+ charge-compensating cations · none | 3D · PristineMFI zeolite framework; SAED indexed assuming Pnma symmetry | 5344 · Results and Discussion - Characterization · Figure 1; Supporting Figure S2 |
| Periodic Na-ZSM-5 computational models | Na-ZSM-5 models with Si/Al = 15, 23, 47none; modelled Na+ charge-compensating cations · none | 3D · Model Systemperiodic ZSM-5 zeolite model | 5344 · Computational Methods |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Cs-ZSM-5 (9.8)research_0363__mat__mat_cation_zsm5 | Powder · Pristine Control · Doped | cation-exchanged ZSM-5 | 8 · Synthesis of H-type, Li-type, and Cs-type ZSM-5 zeolites |
| Li-ZSM-5 (9.8)research_0363__mat__mat_cation_zsm5 | Powder · Pristine Control · Doped | cation-exchanged ZSM-5 | 7-8 · Synthesis of H-type, Li-type, and Cs-type ZSM-5 zeolites |
| Na-ZSM-5 model (Si/Al = 15)research_0363__mat__mat_na_zsm5_model | Model · Model System · Model | periodic DFT model | 5344 · Computational Methods · Figure 2d-e; Figure 4f-h |
| Na-ZSM-5 model (Si/Al = 23)research_0363__mat__mat_na_zsm5_model | Model · Model System · Model | periodic DFT model | 31 · Supplementary Figures · Figure S21 |
| Na-ZSM-5 model (Si/Al = 47)research_0363__mat__mat_na_zsm5_model | Model · Model System · Model | periodic DFT model | 33 · Supplementary Figures · Figure S23 |
| Na-MTW (22)research_0363__mat__mat_na_mtw | Powder · Target Sample · Pristine Framework | seed-assisted hydrothermal Na-MTW zeolite | 65 · Supplementary Tables · Table S9 |
| Na-MTW (30)research_0363__mat__mat_na_mtw | Powder · Target Sample · Pristine Framework | seed-assisted hydrothermal Na-MTW zeolite | 65 · Supplementary Tables · Table S9 |
| Na-MTW (46)research_0363__mat__mat_na_mtw | Powder · Target Sample · Pristine Framework | seed-assisted hydrothermal Na-MTW zeolite | 65 · Supplementary Tables · Table S9 |
| Na-ZSM-5 (19.5)research_0363__mat__mat_na_zsm5_mfi | Powder · Target Sample · Pristine Framework | single-crystalline nanosized zeolite powder | 56-57 · Supplementary Tables · Tables S1-S2 |
| Na-ZSM-5 (29.4)research_0363__mat__mat_na_zsm5_mfi | Powder · Target Sample · Pristine Framework | single-crystalline nanosized zeolite powder | 56-57 · Supplementary Tables · Tables S1-S2 |
| Na-ZSM-5 (38.0)research_0363__mat__mat_na_zsm5_mfi | Powder · Target Sample · Pristine Framework | single-crystalline nanosized zeolite powder | 56-57 · Supplementary Tables · Tables S1-S2 |
| Na-ZSM-5 (38.0)-106research_0363__mat__mat_na_zsm5_mfi | Powder · Pristine Control · Pristine Framework | nanosized particle-size control prepared with L-lysine | 59 · Supplementary Tables · Table S4 |
| Na-ZSM-5 (38.0)-485research_0363__mat__mat_na_zsm5_mfi | Powder · Pristine Control · Pristine Framework | conventional large-sized particle-size control prepared without L-lysine | 59 · Supplementary Tables · Table S4 |
| Na-ZSM-5 (9.8)research_0363__mat__mat_na_zsm5_mfi | Powder · Target Sample · Pristine Framework | single-crystalline nanosized zeolite powder; also fabricated into films/devices | 56-57 · Supplementary Tables · Tables S1-S2 |
| Na-ZSM-5 (9.8) UV photodetector filmresearch_0363__mat__mat_na_zsm5_mfi | Thin Film · Target Sample · Composite | zeolite film spin-coated on SnO2 ETL; 100 nm Au top electrodeITO glass with 100 nm SnO2 electron transport layer | 5344 · Fabrication and Photosensitive Performance of the UV Photodetector · Figure 2f |
| Na-ZSM-5 (9.8) chemiresistive sensor filmresearch_0363__mat__mat_na_zsm5_mfi | Thin Film · Target Sample · Composite | zeolite powder slurry in isopropanol screen-printed on ceramic sensor deviceplanar ceramic device with interdigital Pt electrodes and back Pt heater · approximately 80 um zeolite sensing film | 5344 · Fabrication of Zeolite-Based Gas Sensors and Gas Sensing Measurements · Figure 3a; Supporting Figure S32 |