MoS2 decorated CdS hybrid heterojunction for enhanced photoelectrocatalytic performance under visible light irradiation

Zheng, Zexiao; Yin, Qiang; Cai, Yihan; He, Yi-Ni; Tang, Yiming; Li, Laisheng

doi:10.1016/j.jcis.2018.08.078

Cited by 36 publications

(20 citation statements)

References 47 publications

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Section: Resultssupporting

confidence: 91%

“…The results indicate that the combination with CdS can extend the absorption spectra. The band gaps of MoS2 and CdS are estimated to be 1.58 eV and 2.45 eV, respectively, using Tauc's plot, as shown in Figure 5b, which is in agreement with the previous reports [10,29]. To further study the photogenerated charge carrier transfer properties, transient photocurrent responses were measured by several on-off intermittent visible light irradiation cycles, and the differences between Ion and Ioff (∆Is) are shown in Figure 6a.…”

Section: Resultssupporting

confidence: 87%

“…The Rct value of MC35 is much higher than that of MC1, MC5, MC15, and MC20, which indicate that a high CdS/MoS2 molar ratio causes low separation and mobility of photogenerated carriers, and thus influences the photoelectric performance. The Mott-Schottky plots can be used to investigate the semiconductor type and the flat band potential (E FB ) of the materials [10,29]. The positive slopes of the plots indicate that MoS 2 and CdS are both n-type semiconductors.…”

Section: Resultsmentioning

confidence: 99%

“…The pH value of the electrolyte was 6.7. The potentials appeared in this paper were all converted to the reversible hydrogen electrode (RHE) as Nernst equation [29]: E RHE = 0.0591pH + E Ag/AgCl + 0.197.…”

Section: Photoelectrochemical and Electrochemical Performance Measurementioning

confidence: 99%

“…Among these, cadmium sulfide (CdS) has recently received great interest owing to its direct suitable bandgap of 2.4 eV [26,27], which can be excited by the visible light of the solar spectrum to effectively generate charge carriers. Moreover, CdS has a suitable conduction band potential that is more negative than the reduction potential of H + /H 2 [28,29], making it a promising photocatalyst to be used in water splitting. Many studies have focused on CdS as a photocatalyst [30][31][32], but the high recombination rate of photogenerated carriers, lack of active sites, and photo-corrosion problems limit its application in photocatalytic hydrogen production [17].…”

Section: Introductionmentioning

confidence: 99%

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MoS2/CdS Heterostructure for Enhanced Photoelectrochemical Performance under Visible Light

Zhang

2019

Catalysts

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High-rate recombination of photogenerated electron and hole pairs will lead to low photocatalytic activity. Constructing heterostructure is a way to address this problem and thus increase the photoelectrochemical performance of the photocatalysts. In this article, molybdenum sulfide (MoS2)/cadmium sulfide (CdS) nanocomposites were fabricated by a facile solvothermal method after sonication. The CdS nanoparticles immobilized on the MoS2 sheet retained the original crystal structure and morphology. The composites exhibit higher photoelectrochemical properties compared with pure MoS2 nanosheets or CdS powder. When the precursor concentration of CdS is 0.015 M, the MoS2/CdS composites yield the highest photocurrent, which is enhanced nearly five times compared with pure CdS or MoS2. The improved photoelectrochemical performance can be ascribed to the increase of light harvest, as well as to the heterostructure that decreases the recombination rate of the photogenerated electron and hole pairs.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Photoelectrochemical and Electrochemical Performance Measurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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MoS2/CdS Heterostructure for Enhanced Photoelectrochemical Performance under Visible Light

Zhang

2019

Catalysts

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Photoelectrochemical Water‐Splitting Using CuO‐Based Electrodes for Hydrogen Production: A Review

et al. 2021

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The cost‐effective, robust, and efficient electrocatalysts for photoelectrochemical (PEC) water‐splitting has been extensively studied over the past decade to address a solution for the energy crisis. The interesting physicochemical properties of CuO have introduced this promising photocathodic material among the few photocatalysts with a narrow bandgap. This photocatalyst has a high activity for the PEC hydrogen evolution reaction (HER) under simulated sunlight irradiation. Here, the recent advancements of CuO‐based photoelectrodes, including undoped CuO, doped CuO, and CuO composites, in the PEC water‐splitting field, are comprehensively studied. Moreover, the synthesis methods, characterization, and fundamental factors of each classification are discussed in detail. Apart from the exclusive characteristics of CuO‐based photoelectrodes, the PEC properties of CuO/2D materials, as groups of the growing nanocomposites in photocurrent‐generating devices, are discussed in separate sections. Regarding the particular attention paid to the CuO heterostructure photocathodes, the PEC water splitting application is reviewed and the properties of each group such as electronic structures, defects, bandgap, and hierarchical structures are critically assessed.

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Highly Efficient Visible‐Light‐Driven Photocatalytic Hydrogen Production Using Robust Noble‐Metal‐Free Zn_0.5Cd_0.5S@Graphene Composites Decorated with MoS₂ Nanosheets

Madhusudan

Shi

Chandrashekar

et al. 2020

Adv Materials Inter

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Solar water splitting using semiconductor photocatalysts is considered to be one of the economical and significant techniques for hydrogen evolution. In this study, graphene–ZnxCd1−xS (ZCS) heterojunction is fabricated by hydrothermal method followed by simple photodeposition of ultrathin few layers of molybdenum sulfide (MoS2) nanosheets. The results show that compared with pristine ZCS and 1 wt% graphene mixed ZCS photocatalysts, the 1 wt% graphene and 1 wt% MoS2 photodeposited ZCS composited sample shows 39.5 mmol h−1 g−1 hydrogen production activity, which is 6.9 and 1.9 times significantly higher, respectively, with an apparent quantum yield of 53% at 420 nm visible light is recorded. The improved photocatalytic activity can be attributed to the formation of heterostructure interface between p‐type MoS2 nanosheets with n‐type ZCS host, which allows for the faster transfer of the photogenerated electrons and thus significantly promotes the separation of photogenerated charge carriers.

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MoS2 decorated CdS hybrid heterojunction for enhanced photoelectrocatalytic performance under visible light irradiation

Cited by 36 publications

References 47 publications

MoS2/CdS Heterostructure for Enhanced Photoelectrochemical Performance under Visible Light

MoS2/CdS Heterostructure for Enhanced Photoelectrochemical Performance under Visible Light

Photoelectrochemical Water‐Splitting Using CuO‐Based Electrodes for Hydrogen Production: A Review

Highly Efficient Visible‐Light‐Driven Photocatalytic Hydrogen Production Using Robust Noble‐Metal‐Free Zn_0.5Cd_0.5S@Graphene Composites Decorated with MoS₂ Nanosheets

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MoS2 decorated CdS hybrid heterojunction for enhanced photoelectrocatalytic performance under visible light irradiation

Cited by 36 publications

References 47 publications

MoS2/CdS Heterostructure for Enhanced Photoelectrochemical Performance under Visible Light

MoS2/CdS Heterostructure for Enhanced Photoelectrochemical Performance under Visible Light

Photoelectrochemical Water‐Splitting Using CuO‐Based Electrodes for Hydrogen Production: A Review

Highly Efficient Visible‐Light‐Driven Photocatalytic Hydrogen Production Using Robust Noble‐Metal‐Free Zn0.5Cd0.5S@Graphene Composites Decorated with MoS2 Nanosheets

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Highly Efficient Visible‐Light‐Driven Photocatalytic Hydrogen Production Using Robust Noble‐Metal‐Free Zn_0.5Cd_0.5S@Graphene Composites Decorated with MoS₂ Nanosheets