催化学报 ›› 2026, Vol. 83: 24-53.DOI: 10.1016/S1872-2067(26)64988-1
许凯强a, 朱文君b, Mahmoud Sayedc,*(
), 韩生a,*(
)
收稿日期:2025-09-08
接受日期:2025-10-15
出版日期:2026-04-18
发布日期:2026-03-04
通讯作者:
* 电子信箱: msk07@fayoum.edu.eg (M. Sayed),
hansheng654321@sina.com (韩生).基金资助:
Kaiqiang Xua, Wenjun Zhub, Mahmoud Sayedc,*(
), Sheng Hana,*(
)
Received:2025-09-08
Accepted:2025-10-15
Online:2026-04-18
Published:2026-03-04
Contact:
* E-mail: About author:Mahmoud Sayed received his B.S. (2012), M.S. (2017) in Chemistry from Fayoum University, Egypt, and PhD (2021) from Wuhan University of Technology, China, under supervision of Prof. Jiaguo Yu. Currently, He is a postdoctoral fellow at Prof. Jiaguo Yu’ group at laboratory of solar fuel, China university of geosciences, Wuhan, China. His research interest focuses on the design and integration of photocatalytic materials in energy conversion and environmental applications.Supported by:摘要:
随着全球能源危机与环境污染问题的日益加剧, 开发高效、绿色、可持续的能源转化与污染治理技术成为当今科学研究的重要方向. 光催化技术因其能够直接利用太阳能驱动氧化还原反应, 在清洁能源生产与环境修复领域展现出巨大潜力. 其中, 一维(1D)纳米材料(如纳米棒、纳米线、纳米纤维、纳米管和纳米带)因具有优异的电荷定向传输通道、高比表面积以及丰富的表面活性位点, 成为光催化领域的研究热点. 然而, 单一的1D材料存在光生载流子复合快、量子效率低等问题, 限制了其实际应用. 因此, 构建具有高效电荷分离能力的异质结体系成为提高其光催化性能的关键途径, 特别是近年来提出的S型异质结在促进光生载流子定向迁移与保持强氧化还原能力方面表现突出, 为光催化性能提升提供了新的思路.
本文系统综述了1D S型异质结光催化材料的最新研究进展, 重点介绍了其设计理念、构建方法、表征技术以及应用表现. 首先, 从S型电荷转移模型的历史演变与机理出发, 明确了其在维持强氧化还原能力的同时实现高效载流子分离的本质机理. 随后, 系统总结了1D S型异质结的主要构建方法, 包括原位生长法和静电自组装法. 原位生长法通过水热、溶剂热或煅烧过程在一维骨架表面沉积第二组分, 能够形成紧密接触界面; 静电自组装法则利用组分间正负电荷的库仑作用构建复合界面, 适用于形貌复杂的多组分体系. 还介绍了S型异质结的关键表征方法, 如原位X-射线光电子能谱、开尔文探针力显微镜表面电势测定和飞秒瞬态吸收光谱, 这些技术从电子迁移、能带弯曲和载流子寿命等角度验证了S型电荷转移机制的合理性. 此外, 进一步比较了0D/1D, 1D/1D,1D/2D和1D/3D等多种异质结构体系的性能差异, 指出0D/1D与1D/2D结构在界面耦合、载流子分离与光吸收协同方面最具优势. 典型体系如TiO2/Ce2S3, Cu2O/W18O49和Ag2S/Ta2O5等实现了CO2光还原、产氢、H2O2生成与有机污染物降解等多功能应用. 研究结果表明, 1D S型异质结通过构筑长程电荷迁移通道与高效界面电场, 可显著提高光生载流子的寿命与迁移速率, 实现优异的能量转换与环境净化性能.
最后, 本文展望了1D S型异质结光催化剂未来的发展方向: (1)拓展新型1D结构体系(如含铋纳米线、MOF/COF纳米纤维等); (2)通过晶面调控提升电荷传输效率; (3)结合原位表征与理论计算深入揭示电荷迁移机理; (4)强化半导体界面化学耦合, 构建高效稳定的异质结体系, 以推动其在能源转化与环境修复中的实际应用. 总体而言, 1D S型异质结的研究为解决能源与环境问题提供了新的材料体系与理论基础, 对推动光催化技术的持续发展具有重要意义.
许凯强, 朱文君, Mahmoud Sayed, 韩生. 一维S型光催化剂的设计与制备[J]. 催化学报, 2026, 83: 24-53.
Kaiqiang Xu, Wenjun Zhu, Mahmoud Sayed, Sheng Han. Design and preparation of 1D-based S-scheme photocatalysts[J]. Chinese Journal of Catalysis, 2026, 83: 24-53.
Fig. 1. (a) A schematic illustration of different photophysical actions that happened when incident impinges a photocatalyst: (I) formation of charge carriers by light; (II) electron and holes recombination in bulk; (III) electron and hole recombination at the surface; (IV) consumption of separated electrons and holes in the surface reactions. (b) A schematic diagram of the thermodynamic limitations in photocatalytic reactions.
Fig. 3. Thermodynamic challenges for the liquid-phase Z-scheme mechanism. (a) Proposed mechanism of electron transfer in a liquid-phase Z-scheme system. (b) Thermodynamically more favorable charge-carrier-transfer route.
Fig. 4. Thermodynamic challenges for all-solid-state Z-scheme mechanisms. Proposed electron-transfer route in according to all-solid-state Z-scheme configuration (a) and a thermodynamically more reasonable electron-transfer route (b).
| 1D nanostructure | Advantage | Challenge |
|---|---|---|
| Nanorods | controlled facet exposure, short radial diffusion, good robustness, easier alignment | light absorption depth limits, recombination in core, lower accessible surface area, limited internal functionalization |
| Nanowires | very high surface-to-volume ratio, efficient axial charge transport, good light scattering and waveguiding, stable integration | synthesis control difficulty, surface defects, shading issues, fragility |
| Nanotubes | inner and outer surfaces, short radial thickness, dual-surface functionalization, vertical arrays possible, enhanced light absorption | mechanical collapse, synthesis complexity, mass transport limitations, inner surface traps, shading |
| Nanofibers | high surface area (especially porous), continuous carrier pathways, scalable/easy production (electrospinning), flexibility, good adsorption/diffusion | lower crystallinity, large diameter recombination, random orientation, complex structuring, shading in mats |
| Nanoribbons | tunable edge states and bandgap, large exposed surfaces, good in-plane conduction, integration in hybrid structures, quantum effects | synthesis precision and defect control, edge traps, mechanical fragility, weak absorption if too thin, width diffusion limits |
Table 1 Advantages and challenges of typical 1D nanostructures for S-scheme heterojunction.
| 1D nanostructure | Advantage | Challenge |
|---|---|---|
| Nanorods | controlled facet exposure, short radial diffusion, good robustness, easier alignment | light absorption depth limits, recombination in core, lower accessible surface area, limited internal functionalization |
| Nanowires | very high surface-to-volume ratio, efficient axial charge transport, good light scattering and waveguiding, stable integration | synthesis control difficulty, surface defects, shading issues, fragility |
| Nanotubes | inner and outer surfaces, short radial thickness, dual-surface functionalization, vertical arrays possible, enhanced light absorption | mechanical collapse, synthesis complexity, mass transport limitations, inner surface traps, shading |
| Nanofibers | high surface area (especially porous), continuous carrier pathways, scalable/easy production (electrospinning), flexibility, good adsorption/diffusion | lower crystallinity, large diameter recombination, random orientation, complex structuring, shading in mats |
| Nanoribbons | tunable edge states and bandgap, large exposed surfaces, good in-plane conduction, integration in hybrid structures, quantum effects | synthesis precision and defect control, edge traps, mechanical fragility, weak absorption if too thin, width diffusion limits |
| Photocatalyst | Dimensional structure | Synthesis condition | Application | Ref. |
|---|---|---|---|---|
| ZnIn2S4/ZnO | 0D/1D | chemical bath deposition | H2O2 evolution | [ |
| CeO2/ZnO | 0D/1D | solvothermal | CO2 photoreduction | [ |
| Bi2S3/TiO2 | 0D/1D | hydrothermal | CO2 photoreduction | [ |
| Mn0.3Cd0.7S/CuWO4 | 0D/1D | calcination | tetracycline (TC) degradation and H2 evolution | [ |
| BiSI/Ag2S | 0D/1D | precipitation | Cr(VI) removal | [ |
| CuBi2O4/CoO | 0D/1D | solvothermal | TC degradation | [ |
| Cu2O/W18O49 | 0D/1D | wet impregnation | CO2 photoreduction | [ |
| Bi2Sn2O7/Bi4O5I2 | 0D/1D | solvothermal | BPA degradation | [ |
| ZnO/SnIn4S8 | 1D/2D | solvothermal | H2 evolution | [ |
| TiO2/CaIn2S4 | 1D/2D | solvothermal | H2 evolution | [ |
| Co3O4/BiVO4 | 1D/2D | calcination | H2 evolution and N2 photoreduction | [ |
| W18O49/g-C3N4 | 1D/2D | solvothermal | N2 fixation | [ |
| Mo-WO3/In-C3N4 | 1D/2D | calcination | H2O2 evolution | [ |
| CoTiO3/g‐C3N4 | 1D/2D | calcination | CO2 photoreduction | [ |
| Bi2S3/g-C3N4 | 1D/2D | calcination | TC degradation | [ |
| K6Nb10.8O30/Zn2In2S5 | 1D/2D | solvothermal | H2 evolution | [ |
| Sb2S3/Sv-ZnIn2S4 | 1D/2D | oil bath | H2 evolution | [ |
Table 2 Summary of 1D-based S-scheme photocatalysts synthesized by in situ growth methods.
| Photocatalyst | Dimensional structure | Synthesis condition | Application | Ref. |
|---|---|---|---|---|
| ZnIn2S4/ZnO | 0D/1D | chemical bath deposition | H2O2 evolution | [ |
| CeO2/ZnO | 0D/1D | solvothermal | CO2 photoreduction | [ |
| Bi2S3/TiO2 | 0D/1D | hydrothermal | CO2 photoreduction | [ |
| Mn0.3Cd0.7S/CuWO4 | 0D/1D | calcination | tetracycline (TC) degradation and H2 evolution | [ |
| BiSI/Ag2S | 0D/1D | precipitation | Cr(VI) removal | [ |
| CuBi2O4/CoO | 0D/1D | solvothermal | TC degradation | [ |
| Cu2O/W18O49 | 0D/1D | wet impregnation | CO2 photoreduction | [ |
| Bi2Sn2O7/Bi4O5I2 | 0D/1D | solvothermal | BPA degradation | [ |
| ZnO/SnIn4S8 | 1D/2D | solvothermal | H2 evolution | [ |
| TiO2/CaIn2S4 | 1D/2D | solvothermal | H2 evolution | [ |
| Co3O4/BiVO4 | 1D/2D | calcination | H2 evolution and N2 photoreduction | [ |
| W18O49/g-C3N4 | 1D/2D | solvothermal | N2 fixation | [ |
| Mo-WO3/In-C3N4 | 1D/2D | calcination | H2O2 evolution | [ |
| CoTiO3/g‐C3N4 | 1D/2D | calcination | CO2 photoreduction | [ |
| Bi2S3/g-C3N4 | 1D/2D | calcination | TC degradation | [ |
| K6Nb10.8O30/Zn2In2S5 | 1D/2D | solvothermal | H2 evolution | [ |
| Sb2S3/Sv-ZnIn2S4 | 1D/2D | oil bath | H2 evolution | [ |
Fig. 6. (a) Schematic illustration of the synthesis process for SS and AS series photocatalysts. (b) TEM image of SS NTs (inset: HRTEM image). TEM image (c), and HRTEM image (d) of 10 AS. (e) HAADF image and EDS mapping of 10 AS. Reprinted with permission from Ref. [86]. Copyright 2022, Elsevier.
Fig. 7. (a) Illustration of the formation route of H-W18O49 NW/MIL-125(Ti) NS S-scheme heterostructures. SEM images (b, c), TEM (d) and HRTEM (e) images of H-W18O49 NW/MIL-125(Ti) NS. STEM image (f) and corresponding W (g), O (h), Ti (i), and C (j) element mappings of H-W18O49 NW/MIL-125(Ti) NS. Reprinted with permission from Ref. [110]. Copyright 2022, Elsevier.
Fig. 8. Morphology and structure of TiO2/CsPbBr3 heterojunction. (a?c) TEM, STEM, and HRTEM images of TC2. (d) EDX spectrum of TC2. (e) HAADF image and EDX elemental mappings of Ti, O, Cs, Pb, and Br elements in TC2. Reprinted with permission from Ref. [111]. Copyright 2020, Nature publication group.
Fig. 9. (a) Schematic illustration of the XPS working principle. (b) Illustration of ISIXPS measurements. Reprinted with permission from Ref. [36]. Copyright 2025, Royal Society of Chemistry. High-resolution XPS spectra of Ti 2p (c) and Bi 4f (d). (e) Schematic diagram of S-scheme charge transfer within the TiO2/Ce2S3 heterojunction. Reprinted with permission from Ref. [90]. Copyright 2024, Elsevier.
Fig. 10. Schematic illustration of the KPFM working principle before (a) and after (b) electrical contact. (c) AFM image of CdS-PT composite. Corresponding surface potential distribution of CdS-PT in darkness (d) and under light irradiation (e). (f) Line-scanning surface potential from point A to B. (g) The schematic illustration of photoirradiation KPFM. Reprinted with permission from Ref. [139]. Copyright 2021, Wiley-VCH.
Fig. 11. (a) Schematic illustrations of the work principles of fs-TA spectroscopy. Reprinted with permission from Ref. [134]. Copyright 2024, American Chemical Society. (b) TEM image of CdS/PDB S-scheme photocatalyst. 2D mapping TA spectra of CdS (c) and CdS/PDB (d). TA spectra signal of CdS (e) and CdS/PDB (f). (g) Illustration of the energy barrier between the HOMO of PDB and CBM of CdS. Normalized decay kinetic curves of CdS (h) and CdS/PDB (i). (j) Decay pathways of photogenerated electrons in CdS/PDB. Reprinted with permission from Ref. [130]. Copyright 2023, Wiley-VCH.
| Dimensional structure | S-scheme heterojunction | Application | Efficiency | Ref. |
|---|---|---|---|---|
| 0D/1D | TiO2/Bi2S3 | CO2 photoreduction | CH4 yield = 7.7 μmol·h-1 | [ |
| 0D/1D | Sn-doped TiO2/Bi2S3 | CO2 photoreduction | CH3OH yield = 529 μmol·g-1·h-1 | [ |
| 0D/1D | In2O3/In2S3 | TC degradation | degradation = 83% (60 min) | [ |
| 0D/1D | In2O3/Co2VO4 | CO2 photoreduction | CO and CH4 yields = 15.8 and 22.9 μmol·g-1, respectively | [ |
| 0D/1D | Ta2O5/Ag2S | CO2 photoreduction | CH4 yield = 132.3 μmol·g-1 | [ |
| 0D/1D | CoO/CuBi2O4 | TC degradation | degradation = 89.5% (90 min) | [ |
| 0D/1D | W18O49/Cu2O | CO2 photoreduction | HCOOH yield = 56.42 μmol·g-1·h-1 | [ |
| 0D/1D | AgVO3/CaIn2S4 | tetracycline hydrochloride (TCH) degradation | degradation = 94.1% (80 min) | [ |
| 0D/1D | Bi4O5I2/Bi2Sn2O7 | Bisphenol A (BPA) degradation | BPA complete degraded within 20 min | [ |
| 0D/1D | CdS/NiO | H2 evolution | evolution rate = 7.9 mmol·g-1·h-1 | [ |
| 0D/1D | Bi-MOF/ZnFe2O4 | TC degradation | degradation = 87.4% (60 min) | [ |
| 0D/1D | iCOF/B2O3 | H2O2 evolution | evolution rate = 9.76 mmol·g-1·h-1 | [ |
| 1D/2D | TiO2/BiOBr | Rhodamine B (RhB) degradation | degradation = 98.4% (8 min) | [ |
| 1D/2D | TiO2/Bi2O2CO3 | TC degradation | degradation = 86% (60 min) | [ |
| 1D/2D | TiO2/CaIn2S4 | H2 evolution | evolution rate = 564.7 μmol·g-1·h-1 | [ |
| 1D/2D | ZnO/SnIn4S8 | H2 evolution | evolution rate = 1374.4 μmol·g-1·h-1 | [ |
| 1D/2D | ZnO/CTF | H2O2 evolution | evolution rate = 12000 μmol·g-1·h-1 | [ |
| 1D/2D | Nb2O5/NiO | H2O2 evolution | evolution rate = 0.48 mmol·g-1 | [ |
| 1D/2D | WO3/Zn0.5Cd0.5S | H2 evolution | evolution rate = 715 μmol·g-1·h-1 | [ |
| 1D/2D | H-W18O49/MIL-125(Ti) | CO2 photoreduction | CO yield = 202.37μmol·g-1·h-1 | [ |
| 1D/2D | FeCo2O4/g-C3N4 | H2 evolution | evolution rate = 6303.5 μmol·g-1·h-1 | [ |
| 1D/2D | Bi8(CrO4)O11/g-C3N5 | RhB and TCH degradation | degradation = 94.5% and 93.3% for RhB and TCH within 60min, respectively | [ |
| 1D/2D | Bi2S3/Bi3TiNbO9 | H2O2 evolution | evolution rate = 810 μmol·g-1·h-1 | [ |
| 1D/2D | Sb2S3/ZnIn2S4 | N2 fixation | NH3 yield of 15.96 ± 0.97 mg·L-1 (40 min) | [ |
| 1D/2D | g-C3N4/ZnIn2S4 | U(VI) reduction | U(VI) reduction = 97.4% (22 min) | [ |
Table 3 Recently reported 1D-based S-scheme photocatalysts for different applications.
| Dimensional structure | S-scheme heterojunction | Application | Efficiency | Ref. |
|---|---|---|---|---|
| 0D/1D | TiO2/Bi2S3 | CO2 photoreduction | CH4 yield = 7.7 μmol·h-1 | [ |
| 0D/1D | Sn-doped TiO2/Bi2S3 | CO2 photoreduction | CH3OH yield = 529 μmol·g-1·h-1 | [ |
| 0D/1D | In2O3/In2S3 | TC degradation | degradation = 83% (60 min) | [ |
| 0D/1D | In2O3/Co2VO4 | CO2 photoreduction | CO and CH4 yields = 15.8 and 22.9 μmol·g-1, respectively | [ |
| 0D/1D | Ta2O5/Ag2S | CO2 photoreduction | CH4 yield = 132.3 μmol·g-1 | [ |
| 0D/1D | CoO/CuBi2O4 | TC degradation | degradation = 89.5% (90 min) | [ |
| 0D/1D | W18O49/Cu2O | CO2 photoreduction | HCOOH yield = 56.42 μmol·g-1·h-1 | [ |
| 0D/1D | AgVO3/CaIn2S4 | tetracycline hydrochloride (TCH) degradation | degradation = 94.1% (80 min) | [ |
| 0D/1D | Bi4O5I2/Bi2Sn2O7 | Bisphenol A (BPA) degradation | BPA complete degraded within 20 min | [ |
| 0D/1D | CdS/NiO | H2 evolution | evolution rate = 7.9 mmol·g-1·h-1 | [ |
| 0D/1D | Bi-MOF/ZnFe2O4 | TC degradation | degradation = 87.4% (60 min) | [ |
| 0D/1D | iCOF/B2O3 | H2O2 evolution | evolution rate = 9.76 mmol·g-1·h-1 | [ |
| 1D/2D | TiO2/BiOBr | Rhodamine B (RhB) degradation | degradation = 98.4% (8 min) | [ |
| 1D/2D | TiO2/Bi2O2CO3 | TC degradation | degradation = 86% (60 min) | [ |
| 1D/2D | TiO2/CaIn2S4 | H2 evolution | evolution rate = 564.7 μmol·g-1·h-1 | [ |
| 1D/2D | ZnO/SnIn4S8 | H2 evolution | evolution rate = 1374.4 μmol·g-1·h-1 | [ |
| 1D/2D | ZnO/CTF | H2O2 evolution | evolution rate = 12000 μmol·g-1·h-1 | [ |
| 1D/2D | Nb2O5/NiO | H2O2 evolution | evolution rate = 0.48 mmol·g-1 | [ |
| 1D/2D | WO3/Zn0.5Cd0.5S | H2 evolution | evolution rate = 715 μmol·g-1·h-1 | [ |
| 1D/2D | H-W18O49/MIL-125(Ti) | CO2 photoreduction | CO yield = 202.37μmol·g-1·h-1 | [ |
| 1D/2D | FeCo2O4/g-C3N4 | H2 evolution | evolution rate = 6303.5 μmol·g-1·h-1 | [ |
| 1D/2D | Bi8(CrO4)O11/g-C3N5 | RhB and TCH degradation | degradation = 94.5% and 93.3% for RhB and TCH within 60min, respectively | [ |
| 1D/2D | Bi2S3/Bi3TiNbO9 | H2O2 evolution | evolution rate = 810 μmol·g-1·h-1 | [ |
| 1D/2D | Sb2S3/ZnIn2S4 | N2 fixation | NH3 yield of 15.96 ± 0.97 mg·L-1 (40 min) | [ |
| 1D/2D | g-C3N4/ZnIn2S4 | U(VI) reduction | U(VI) reduction = 97.4% (22 min) | [ |
Fig. 13. Insights into the charge separation within the S-scheme heterojunction. (a) Schematic illustration of the TiO2/Ce2S3 S-scheme heterojunction under UV light irradiation for photocatalytic nitrobenzene hydrogenation. The pseudocolor plots and transient absorption spectra recorded at indicated delay times measured with 350 nm excitation: pure TiO2 nanofibers (b,c) and TiO2/Ce2S3 nanohybrids (TC5) (d,e). (f) Corresponding transient absorption kinetic traces of TiO2 and TC5 at 645 nm within 100 ps. (g) Schematic diagram of S-scheme charge transfer within the TiO2/Ce2S3 heterojunction. Reprinted with permission from Ref. [175]. Copyright 2022, American Chemical Society.
Fig. 14. SEM images of ZnO (a) and ZZS-20 (b) nanofibers. (c) TEM images of ZZS-20. (d) HRTEM images of ZZS-20. (e) HAADF image and EDX elemental mappings of Zn, O, In, and S elements in ZZS-20. Calculated electrostatic potentials of ZnO (f) and ZnIn2S4 (g). (h) Charge density difference of ZnO/ZnIn2S4 (the yellow region signifies the accumulation layer of electrons and the cyan region is the electron depletion layer). (i) Electron transfer mechanism of ZnO/ZnIn2S4 S-scheme heterojunction. (j) Photocatalytic H2O2 evolution performance of different photocatalysts. (k) Stability cycle test of H2O2 production by ZZS-20. Reprinted with permission from Ref. [88]. Copyright 2023, Elsevier.
Fig. 15. (a) Preparation route of p-CNQDs/VO-ZnO composite. (b) EPR spectra of ZnO, g-C3N4/VO-ZnO, and p-CNQDs/VO-ZnO. (c) UV-vis DRS of ZnO, p-CNQDs, and p-CNQDs/VO-ZnO composites. (d) ΔGH* values of g-C3N4/VO-ZnO and p-CNQDs/VO-ZnO. Reprinted with permission from Ref. [183]. Copyright 2022, Elsevier.
Fig. 16. (a) Schematic illustration for synthesis of Cu2O/W18O49 heterojunction. (b) XRD patterns of W18O49, 20% Cu:W, 40% Cu:W, 60% Cu:W, 80% Cu:W and the corresponding amplified XRD pattern (right). SEM images of W18O49 (c) and Cu2O/W18O49 (d). (e) HRTEM image of W18O49. TEM (f) and HRTEM (g) images of Cu2O/W18O49. (h) Photocatalytic CO2 reduction performance over Cu2O/W18O49 heterojunction with different composition. (i) Comparison with the contrast samples. Reprinted with permission from Ref. [94]. Copyright 2025, Elsevier.
Fig. 17. (a) Schematic Illustration of assembly fiber heterojunction photocatalysts. TEM image (b) and HRTEM image (c) of AFSP heterojunction. 2D transient absorption surface plots of Ta2O5 (d) and ASTO-2 (g). Transient absorption signals of Ta2O5 (e) and ASTO-2 (h). The decay signals of Ta2O5 and ASTO-2 monitored at 460 nm (f) and 500 nm (i) (inset of schematic diagram of charge transfer within the ASTO heterojunction). Reprinted with permission from Ref. [153]. Copyright 2023, Wiley‐VCH.
Fig. 18. In-situ irradiation XPS spectra of Ni 2p (a), O 1s (b), Cd 3d (c), and S 2p (d) in 15%NiO/CdS. KFPM images under darkness condition (e) and visible-light irradiation condition (f). (g) Surface photovoltage distribution under dark and visible-light irradiation of 15%NiO/CdS. (h) IEF formation and electron transfer of NiO/CdS. Reprinted with permission from Ref. [155]. Copyright 2024, Elsevier.
Fig. 19. (a) Photocatalytic H2-production plots. (b) Photocatalytic H2-production rate of different samples. (c) Cycling stability of the MCS/W-6. (d) UV-vis DRS spectrum and AQY of the MCS/W-6 photocatalyst at 380, 450, 500 and 550 nm. (e) Schematic diagram of the S-scheme charge-transfer mechanism in the MCS/W heterojunction system. Reprinted with permission from Ref. [194]. Copyright 2022, Elsevier.
Fig. 20. TEM (a,b) and HRTEM (c) images of the CPB/AgBr heterojunction. (d) EDX elemental mappings of Cs, Pb, Br and Ag elements in the CPB/AgBr heterojunction. ESR spectra of DMPO-?OH (e) and DMPO-?O2? (f) in the presence of CsPbBr3 NCs, AgBr and the CPB/AgBr heterojunction. (g) CO and CH4 evolution over CsPbBr3 NCs, AgBr and the CPB/AgBr heterojunctions after 4 h of photocatalytic reaction. (h) Recycling tests with four 4 h cycles. Reprinted with permission from Ref. [195]. Copyright 2022, Elsevier.
Fig. 21. (a) HRTEM and HAADF images of MAPB-TCOF. (b) Mapping images of C, N, Pb, and Br elements in MAPB-T-COF. EPR spectra of ·O2- in the presence of T-COF (c), MAPB (d), and MAPB-T-COF (e) under different conditions. (f) Signal comparison of ·O2- on MAPB-T-COF, T-COF, and MAPB under light illumination. (g) Signal comparison of ·O2- on MAPB-T-COF, T-COF, and MAPB with the addition of 4-MBT with blue LED illumination. (h) EPR spectra of ·O2- in the presence of MAPB-TCOF with various thiophenols. Reprinted with permission from Ref. [197]. Copyright 2023, American Chemical Society.
Fig. 22. Scheme illustration for the synthesis of Bi3TiNbO9/Bi2S3 heterojunction (a) and TEM (b) and SAED (c) images of the Bi3TiNbO9/Bi2S3. (d) Atomic-level HRTEM image of the Bi3TiNbO9 of dashed box area in (b). (e,f) TEM image of pristine Bi2S3 and its HAADF-STEM image of dashed box area in (e). (g,h) The corresponding lattice distances of the Bi3TiNbO9 and Bi2S3 in (d) and (f), respectively. (i) Photocatalytic performances of Bi3TiNbO9, Bi2S3, Bi3TiNbO9+Bi2S3, and Bi3TiNbO9/Bi2S3 heterojunction under simulated sunlight. (j) Schematic illustration of energy band arrangement of Bi3TiNbO9/Bi2S3 heterojunction upon illumination. (k) Photocatalytic H2O2 evolution performance of the Bi3TiNbO9/Bi2S3 with continuous 13 cycles (1 h foreach cycle) under simulated sunlight. Reprinted with permission from Ref. [164]. Copyright 2024, Wiley‐VCH.
Fig. 23. (a) Schematic diagram for the preparation of WO3?x/In2S3 heterostructures. (b) FESEM images of WO3?x nanofibers at different magnifications. (c) FESEM, (d?f) HRTEM images of WO3?x/In2S3 hybrid nanofibers. (g) HAADF image and EDX elemental mappings of W, O, In and S elements in WO3?x/In2S3 nanostructures. Gibbs free energy diagram of: CO2 photoreduction over In2S3 (002) surface (h) and H2O photooxidation over WO3?x (001) surface (i). Reprinted with permission from Ref. [208]. Copyright 2024, Wiley-VCH.
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