Modification of ZnS1−x−0.5yOx(OH)y–ZnO photocatalyst with NiS for enhanced visible-light-driven hydrogen generation from seawater

Li, Yuexiang; Lin, Shi-Yi; Peng, Shaoqin; Lü, Gongxuan; Li, Shuben

doi:10.1016/j.ijhydene.2013.09.149

Cited by 45 publications

(29 citation statements)

References 31 publications

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“…However, there have been few studies for hydrogen generation using seawater. Some studies have used different catalysts such as ZnS 1 -x-0.5yOx(OH)y-ZnO [2], CdS/TiO 2 [3], Pt/Cd 0.5 Zn 0.5 S [4] using visible light [5] and UV light [6]. Most studies have used artificial saltwater with certain amount of salts and ions dissolved, while Lee et al have used natural seawater from the Pacific Ocean.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic Hydrogen Production from Seawater Using CdxZn1-xS

Jose¹,

Nogales²,

Rollon³

et al. 2017

IJCEA

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Abstract-Hydrogengas has been shown to photocatalytically generated from pure water. With saltwater comprising 93% of the earth's water reservoir, methods to produce hydrogen from seawater minus the expensive water purification are desired. Cd 0.8 Zn 0.2 S has been proven as an effective photocatalyst for hydrogen production but it remains to be tested in seawater. This study provides proof of concept for hydrogen production from seawater using fresh and reused Cd 0.8 Zn 0.2 S upon irradiation with visible light and with the addition of sulfide/sulfite as sacrificial agents. The post-usage characteristics of Cd 0.8 Zn 0.2 S catalyst were investigated using SEM and FTIR. The rate of hydrogen gas production from seawater was up to six times faster than in distilled and simulated seawater for both fresh and reused catalyst. Reused catalyst showed reduced rates of gas accumulation. Catalysts exposed to non-distilled water showed marked changes in their SEM appearance and their spectral transmittance.

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Section: Introductionmentioning

confidence: 99%

“…To do this, sacrificial reagents such as methanol [6], glucose [4] and sulfide ions [2] have been added to the aqueous suspension containing the photo catalyst. These reducing agents, that are also called Photocatalytic Hydrogen Production from Seawater Using CdxZn1-xS hole scavengers, are irreversibly oxidized by photogenerated holes.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Hydrogen Production from Seawater Using CdxZn1-xS

Jose¹,

Nogales²,

Rollon³

et al. 2017

IJCEA

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“…11 Therefore, many strategies have been developed to improve the photoactivity and stability of metal sulphide photocatalysts, for instance, by loading with a noble metal, changing the preparation process and/or introducing the sulphide into layered or porous inorganic substances. 4,[15][16][17] Also, Zn 2+ with a smaller ion radius (0.74 Å) than Cd 2+ (0.97 Å) can provide a stronger connection among atoms in the solid solution, causing an improved photostability of CdS. 4,[15][16][17] Also, Zn 2+ with a smaller ion radius (0.74 Å) than Cd 2+ (0.97 Å) can provide a stronger connection among atoms in the solid solution, causing an improved photostability of CdS.…”

Section: Introductionmentioning

confidence: 99%

“…4,[15][16][17] Also, Zn 2+ with a smaller ion radius (0.74 Å) than Cd 2+ (0.97 Å) can provide a stronger connection among atoms in the solid solution, causing an improved photostability of CdS. [15][16][17][18][19] Moreover, the energy band structure and the visible light-induced activity of the Cd 1Àx Zn x S solid solutions can be conveniently tuned by adjusting the x value, and the Cd 0.8 Zn 0.2 S solid solution with a Cd/Zn atomic ratio of B4 seems to show the maximum activity for H 2 production among the various Cd 1Àx Zn x S solid solutions. [15][16][17][18][19] Moreover, the energy band structure and the visible light-induced activity of the Cd 1Àx Zn x S solid solutions can be conveniently tuned by adjusting the x value, and the Cd 0.8 Zn 0.2 S solid solution with a Cd/Zn atomic ratio of B4 seems to show the maximum activity for H 2 production among the various Cd 1Àx Zn x S solid solutions.…”

Section: Introductionmentioning

confidence: 99%

“…[15][16][17][18][19] Moreover, the energy band structure and the visible light-induced activity of the Cd 1Àx Zn x S solid solutions can be conveniently tuned by adjusting the x value, and the Cd 0.8 Zn 0.2 S solid solution with a Cd/Zn atomic ratio of B4 seems to show the maximum activity for H 2 production among the various Cd 1Àx Zn x S solid solutions. [15][16][17][18][19] In view of the practical application, cost reduction of the photocatalytic H 2 production system is one of the key issues. [15][16][17][18][19] In view of the practical application, cost reduction of the photocatalytic H 2 production system is one of the key issues.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Ni@C–Cd_0.8Zn_0.2S nanocomposites with highly efficient and stable photocatalytic hydrogen production activity

Liu

Zhuang

et al. 2015

Phys. Chem. Chem. Phys.

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A series of carbon-coated Ni (Ni@C)-Cd0.8Zn0.2S nanocomposites were fabricated via a facile hydrothermal process using pre-prepared Ni@C as a starting material. The obtained products were characterized by X-ray diffraction, UV-Vis diffuse reflectance absorption spectroscopy, X-ray photoelectron spectroscopy and electron microscopy. It was found that the introduction of Ni@C nanoparticles can improve both the visible light-induced photocatalytic H2 production activity and stability of the Cd0.8Zn0.2S solid solution, and the Ni nanoparticles encapsulated by several graphite-like carbon layers show high chemical and thermal stability. Among those products with various Ni@C contents, the 5 wt% Ni@C-Cd0.8Zn0.2S nanocomposite exhibits the maximum photoactivity (969.5 μmol h(-1)) for H2 production, which is ∼3.10 times higher than that (312.6 μmol h(-1)) of pristine Cd0.8Zn0.2S. This significant enhancement in the photoactivity by loading Ni@C nanoparticles can be attributed to the metallic Ni in the Ni@C acting as a co-catalyst, while the graphite-like carbon shells acting as the Cd0.8Zn0.2S nanoparticles' support and electron acceptor, which causes an effective photogenerated carrier separation in space and an improvement in the photoactivity and stability for H2 production. The present findings demonstrate a cost reduction strategy by using a non-noble metal co-catalyst for efficient and stable light-to-hydrogen energy conversion.

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Heterointerface Engineering of ZnO/CdS Heterostructures through ZnS Layers for Photocatalytic Water Splitting

Guo

Liu

Yan

et al. 2022

Chemistry A European J

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Solar-driven water splitting to produce clean and renewable hydrogen offers a green strategy to address the energy crisis and environmental pollution. Heterostructure catalysts are receiving increasing attention for photocatalytic hydrogen generation. ZnO/ZnS/CdS and ZnO/CdS heterostructures have been successfully designed and prepared according to two different strategies. By introducing a heterointerface layer of ZnS between ZnO and CdS, a Z scheme charge-transfer channel was promoted and achieved superior photocatalytic performance. A highest hydrogen generation rate of 156.7 μmol g À 1 h À 1 was achieved by precise control of the thickness of the heterointerface layer and of the CdS shell. These findings demonstrated that heterostructures are promising catalysts for solar-driven water splitting, and that heterointerface engineering is an effective way to improve the photocatalytic properties of heterostructures.

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Modification of ZnS1−x−0.5yOx(OH)y–ZnO photocatalyst with NiS for enhanced visible-light-driven hydrogen generation from seawater

Cited by 45 publications

References 31 publications

Photocatalytic Hydrogen Production from Seawater Using CdxZn1-xS

Photocatalytic Hydrogen Production from Seawater Using CdxZn1-xS

Preparation of Ni@C–Cd_0.8Zn_0.2S nanocomposites with highly efficient and stable photocatalytic hydrogen production activity

Heterointerface Engineering of ZnO/CdS Heterostructures through ZnS Layers for Photocatalytic Water Splitting

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Modification of ZnS1−x−0.5yOx(OH)y–ZnO photocatalyst with NiS for enhanced visible-light-driven hydrogen generation from seawater

Cited by 45 publications

References 31 publications

Photocatalytic Hydrogen Production from Seawater Using CdxZn1-xS

Photocatalytic Hydrogen Production from Seawater Using CdxZn1-xS

Preparation of Ni@C–Cd0.8Zn0.2S nanocomposites with highly efficient and stable photocatalytic hydrogen production activity

Heterointerface Engineering of ZnO/CdS Heterostructures through ZnS Layers for Photocatalytic Water Splitting

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Preparation of Ni@C–Cd_0.8Zn_0.2S nanocomposites with highly efficient and stable photocatalytic hydrogen production activity