Preparation of Composite Catalyst SiC-CdLa2S4 and Its Application in Photocatalytic Decomposition of Water Hydrogen Production

Yu-min, 崔玉民 Cui; Rui-juan, 师瑞娟 Shi; Hui-quan, 李慧泉 Li; Hui, 苗慧 Miao

doi:10.3788/fgxb20163701.0007

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“…Most recently, the use of nanosized noble metals, such as Au, 22 to decorate SiC has been used to form a new Fermi level equilibrium that inhibits the photogenerated electrons and holes recombination. The adoption of noble metals and other substances, such as Pt/SiC 18 and SiC–CdLa 2 S 4 , 23 significantly improves the photocatalytic efficiency of SiC. However, the scarcity of precious metals, high cost, and subsequent environmental pollution hinder their widespread use.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity of SiC-Based Ternary Graphene Materials: A DFT Study and the Photocatalytic Mechanism

Zhang

et al. 2019

ACS Omega

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A graphene-like semiconductor composite is one of the most promising photocatalyst that does not use noble metals. These composites have excellent photocatalytic properties and have attracted great attention for water splitting. Here, a facile method called the hydrothermal method was used to prepare graphene oxide (GO)/SiC/MoS2 composites. Under visible-light irradiation, the GO/SiC/MoS2 composite had excellent photocatalytic production of hydrogen from water splitting. In particular, the catalyst added 8 wt % of Mo weight yielded the highest quantum of 20.45% at 400–700 nm of wavelength. A positive synergistic effect between the layered GO and MoS2 components contributed to the enhanced photoactivity of the SiC particles. The synergistic effect reduced the recombination of photogenerated holes and electrons, enhanced the rate of electron transfer, and provided more reaction active sites for water splitting. The interactions among SiC, GO, and MoS2 were investigated using a density functional theory. The calculations showed that the relative positions between graphene only slightly affect the stability of the interface, and the MoS2 layers have a great influence. The photocatalytic mechanism was also discussed, and electron transfer was predicted.

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Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity of SiC-Based Ternary Graphene Materials: A DFT Study and the Photocatalytic Mechanism

Zhang

et al. 2019

ACS Omega

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show abstract

Preparation of Composite Catalyst SiC-CdLa2S4 and Its Application in Photocatalytic Decomposition of Water Hydrogen Production

Cited by 1 publication

References 0 publications

Enhanced Photocatalytic Activity of SiC-Based Ternary Graphene Materials: A DFT Study and the Photocatalytic Mechanism

Enhanced Photocatalytic Activity of SiC-Based Ternary Graphene Materials: A DFT Study and the Photocatalytic Mechanism

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