Macroporous ZnO/ZnS/CdS composite spheres as efficient and stable photocatalysts for solar-driven hydrogen generation

Runlin Zhang, Jiwei Xie, Chao Wang, Jing Liu, Xianfeng Zheng, Yu Li, Xiaoyu Yang, Hong En Wang, Bao Lian Su

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

Solar-driven hydrogen (H2) generation utilizing photocatalysts has received extensive attention because of its potential to mitigate the global energy crisis and environmental problem. The implementation of efficient H2 production strongly relies on stable, active, and low-cost photocatalysts. In this work, we report the designed synthesis of macroporous ZnO/ZnS/CdS composite spheres as a highly active photocatalyst for H2 production via solar-driven water splitting. The composite spheres were synthesized by a facile solvothermal reaction paired with controllable ion-exchange processes. The resulting material exhibits superior photocatalytic activity, delivering a high H2 production rate of ~11.37 mmol h−1 g−1 under light illumination (250–780 nm, with an ultraviolet light intensity of 34 mW cm−2 and visible light intensity of 158 mW cm−2). Such performance enhancement can be mainly ascribed to the synergic effects of the composite structure: (1) formation of coherent ZnO/CdS and ZnS/CdS heterojunctions at nanoscale, facilitating charge separation of photoinduced electron/hole pairs, (2) highly accessible inner surface of the meso/macroporous ZnO/ZnS/CdS composites for rapid mass transfer of electrolyte, and (3) enhanced visible light scattering capability induced by their large particle size.

langue originaleAnglais
Pages (de - à)11124-11134
Nombre de pages11
journalJournal of Materials Science
Volume52
Numéro de publication19
Les DOIs
étatPublié - 1 oct. 2017

Empreinte digitale

Photocatalysts
Hydrogen
Composite materials
Composite structures
Light scattering
Electrolytes
Heterojunctions
Ion exchange
Mass transfer
Lighting
Particle size
Electrons
Water
Costs

Citer ceci

Zhang, Runlin ; Xie, Jiwei ; Wang, Chao ; Liu, Jing ; Zheng, Xianfeng ; Li, Yu ; Yang, Xiaoyu ; Wang, Hong En ; Su, Bao Lian. / Macroporous ZnO/ZnS/CdS composite spheres as efficient and stable photocatalysts for solar-driven hydrogen generation. Dans: Journal of Materials Science. 2017 ; Vol 52, Numéro 19. p. 11124-11134.
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abstract = "Solar-driven hydrogen (H2) generation utilizing photocatalysts has received extensive attention because of its potential to mitigate the global energy crisis and environmental problem. The implementation of efficient H2 production strongly relies on stable, active, and low-cost photocatalysts. In this work, we report the designed synthesis of macroporous ZnO/ZnS/CdS composite spheres as a highly active photocatalyst for H2 production via solar-driven water splitting. The composite spheres were synthesized by a facile solvothermal reaction paired with controllable ion-exchange processes. The resulting material exhibits superior photocatalytic activity, delivering a high H2 production rate of ~11.37 mmol h−1 g−1 under light illumination (250–780 nm, with an ultraviolet light intensity of 34 mW cm−2 and visible light intensity of 158 mW cm−2). Such performance enhancement can be mainly ascribed to the synergic effects of the composite structure: (1) formation of coherent ZnO/CdS and ZnS/CdS heterojunctions at nanoscale, facilitating charge separation of photoinduced electron/hole pairs, (2) highly accessible inner surface of the meso/macroporous ZnO/ZnS/CdS composites for rapid mass transfer of electrolyte, and (3) enhanced visible light scattering capability induced by their large particle size.",
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author = "Runlin Zhang and Jiwei Xie and Chao Wang and Jing Liu and Xianfeng Zheng and Yu Li and Xiaoyu Yang and Wang, {Hong En} and Su, {Bao Lian}",
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Macroporous ZnO/ZnS/CdS composite spheres as efficient and stable photocatalysts for solar-driven hydrogen generation. / Zhang, Runlin; Xie, Jiwei; Wang, Chao; Liu, Jing; Zheng, Xianfeng; Li, Yu; Yang, Xiaoyu; Wang, Hong En; Su, Bao Lian.

Dans: Journal of Materials Science, Vol 52, Numéro 19, 01.10.2017, p. 11124-11134.

Résultats de recherche: Contribution à un journal/une revueArticle

TY - JOUR

T1 - Macroporous ZnO/ZnS/CdS composite spheres as efficient and stable photocatalysts for solar-driven hydrogen generation

AU - Zhang, Runlin

AU - Xie, Jiwei

AU - Wang, Chao

AU - Liu, Jing

AU - Zheng, Xianfeng

AU - Li, Yu

AU - Yang, Xiaoyu

AU - Wang, Hong En

AU - Su, Bao Lian

PY - 2017/10/1

Y1 - 2017/10/1

N2 - Solar-driven hydrogen (H2) generation utilizing photocatalysts has received extensive attention because of its potential to mitigate the global energy crisis and environmental problem. The implementation of efficient H2 production strongly relies on stable, active, and low-cost photocatalysts. In this work, we report the designed synthesis of macroporous ZnO/ZnS/CdS composite spheres as a highly active photocatalyst for H2 production via solar-driven water splitting. The composite spheres were synthesized by a facile solvothermal reaction paired with controllable ion-exchange processes. The resulting material exhibits superior photocatalytic activity, delivering a high H2 production rate of ~11.37 mmol h−1 g−1 under light illumination (250–780 nm, with an ultraviolet light intensity of 34 mW cm−2 and visible light intensity of 158 mW cm−2). Such performance enhancement can be mainly ascribed to the synergic effects of the composite structure: (1) formation of coherent ZnO/CdS and ZnS/CdS heterojunctions at nanoscale, facilitating charge separation of photoinduced electron/hole pairs, (2) highly accessible inner surface of the meso/macroporous ZnO/ZnS/CdS composites for rapid mass transfer of electrolyte, and (3) enhanced visible light scattering capability induced by their large particle size.

AB - Solar-driven hydrogen (H2) generation utilizing photocatalysts has received extensive attention because of its potential to mitigate the global energy crisis and environmental problem. The implementation of efficient H2 production strongly relies on stable, active, and low-cost photocatalysts. In this work, we report the designed synthesis of macroporous ZnO/ZnS/CdS composite spheres as a highly active photocatalyst for H2 production via solar-driven water splitting. The composite spheres were synthesized by a facile solvothermal reaction paired with controllable ion-exchange processes. The resulting material exhibits superior photocatalytic activity, delivering a high H2 production rate of ~11.37 mmol h−1 g−1 under light illumination (250–780 nm, with an ultraviolet light intensity of 34 mW cm−2 and visible light intensity of 158 mW cm−2). Such performance enhancement can be mainly ascribed to the synergic effects of the composite structure: (1) formation of coherent ZnO/CdS and ZnS/CdS heterojunctions at nanoscale, facilitating charge separation of photoinduced electron/hole pairs, (2) highly accessible inner surface of the meso/macroporous ZnO/ZnS/CdS composites for rapid mass transfer of electrolyte, and (3) enhanced visible light scattering capability induced by their large particle size.

KW - photocatalytic activity

KW - inductively couple plasma atomic spectroscopy

KW - diethylene glycol

KW - composite sphere

KW - visible light intensity

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JO - Journal of Materials Science

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SN - 0022-2461

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