Synthesis of ultrathin CdS nanosheets as efficient visible-light-driven water splitting photocatalysts for hydrogen evolution

Xu, You; Zhao, Weiwei; Xu, Rui; Shi, Yanmei; Zhang, Bin

doi:10.1039/c3cc46342g

Cited by 312 publications

(181 citation statements)

References 28 publications

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“…It was found that the CdS ultrathin nanosheets with a thickness of ∼4 nm could provide a large specific surface area for harvesting more photons and absorbing more molecular cocatalysts. Such a configuration facilitates the fast transfer of the photogenerated charge carries from the photogenerated centre to the surface of CdS [83,135]. Under optimal conditions, the CdS/Ni-based complex 1 hybrid system can generate over 28,000 TON of H 2 (with respect to complex 1) with a long-term durability of over 90 h in the ethanol/water mixture solution (pH 12.5) using triethylamine (TEA) as the sacrificial electron donors.…”

Section: Ni-based Complexes Cocatalysts For H 2 Evolutionmentioning

confidence: 98%

Nickel-based cocatalysts for photocatalytic hydrogen production

2015

Applied Surface Science

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138

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Section: Ni-based Complexes Cocatalysts For H 2 Evolutionmentioning

confidence: 98%

Nickel-based cocatalysts for photocatalytic hydrogen production

2015

Applied Surface Science

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233

138

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“…[6][7][8][9][10][11] On the other hand, one-dimensional (1D) and two-dimensional (2D) (nanorods, nanowires, nanotubes and nanosheet) semiconducting nanostructures are thought to play a crucial role in next-generation building blocks for solar energy harvesting and photocatalysis, due to their fascinating physicochemical properties and their unique geometric and electronic properties. [12][13][14][15][16][17][18][19][20] Emphasis has been given on wide band gap semiconductor nanomaterials, like TiO 2 and ZnO based nanostructures, [21][22] which exhibit ultraviolet region absorption instead of visible light harvesting. However, II-IV semiconductor, like CdS has a suitable band gap (2.4 eV) which is appropriate for sunlight absorption.…”

Section: Introductionmentioning

confidence: 99%

2D Hybrid Nanostructure of Reduced Graphene Oxide–CdS Nanosheet for Enhanced Photocatalysis

Bera

Kundu

Patra

2015

ACS Appl. Mater. Interfaces

268

113

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Graphene-based hybrid nanostructures have recently emerged as a new class of functional materials for light-energy conversion and storage. Here, we have synthesized reduced graphene oxide (RGO)-semiconductor composites to improve the efficiency of photocatalysis. Zero-dimensional CdS nanoparticles (0D), one-dimensional CdS nanorods (1D), and two-dimensional CdS nanosheets (2D) are grafted on the RGO sheet (2D) by a surface modification method using 4-aminothiophenol (4-ATP). Structural analysis confirms the attachment of CdS nanocrystals with RGO, and the strong electronic interaction is found in the case of a CdS nanosheet and RGO, which has an influence on photocatalytic properties. The degradation of dye under visible light varies with changing the dimension of nanocrystals, and the catalytic activity of the CdS NS/RGO composite is ∼4 times higher than that of CdS nanoparticle/RGO and 3.4 times higher than that of CdS nanorod/RGO composite samples. The catalytic activity of the CdS nanosheet/RGO composite is also found to be ∼2.5 times than that of pure CdS nanosheet samples. The unique 2D-2D nanoarchitecture would be effective to harvest photons from solar light and transport electrons to reaction sites with respect to other 0D-2D and 1D-2D hybrid systems. This observation can be extended to other graphene-based inorganic semiconductor composites, which can provide a valuable opportunity to explore novel hybrid materials with superior visible-light-induced catalytic activity.

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“…However, the low activity and rapid photocorrosion make pure CdS photocatalyst unfavorable for hydrogen evolution reaction (HER) because photogenerated electron and hole pairs cannot be efficiently separated and transferred [14,15]. Loading cocatalysts on CdS to create hierarchical structures provides high activation potentials for HER and suppresses the photocorrosion of CdS [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Enhanced photoelectrochemical and photocatalytic activities of CdS nanowires by surface modification with MoS2 nanosheets

Wang

Naghadeh

et al. 2018

Sci. China Mater.

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Nanocomposites composed of one-dimensional (1D) CdS nanowires (NWs) and 1T-MoS 2 nanosheets have been fabricated through a two-step solvothermal process. 5 mol% of MoS 2 loading results in the best optical properties, photoelectrochemical (PEC) as well as photocatalytic activities for hydrogen evolution reaction (HER). Compared with pure CdS NWs, the optimized nanocomposite shows 5.5 times enhancement in photocurrent and 86.3 times increase for HER in the presence of glucose and lactic acid as hole scavengers. The enhanced PEC and HER activities are attributed to the intimate contact between MoS 2 and CdS that efficiently enhances charge carrier separation. In addition, ultrafast transient absorption (TA) measurements have been used to probe the charge carrier dynamics and gain deeper insight into the mechanism behind the enhanced PEC and photocatalytic performance.

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Synthesis of ultrathin CdS nanosheets as efficient visible-light-driven water splitting photocatalysts for hydrogen evolution

Cited by 312 publications

References 28 publications

Nickel-based cocatalysts for photocatalytic hydrogen production

Nickel-based cocatalysts for photocatalytic hydrogen production

2D Hybrid Nanostructure of Reduced Graphene Oxide–CdS Nanosheet for Enhanced Photocatalysis

Enhanced photoelectrochemical and photocatalytic activities of CdS nanowires by surface modification with MoS2 nanosheets

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