MoS2/TiO2复合催化剂的制备及其在紫外光下的光催化制氢活性

doi:10.3866/PKU.WHXB201704141

Abstract

Abstract:

To study the activity of a composite photocatalyst for photocatalytic hydrogen production, we prepared and loaded MoS₂ nanosheets with TiO₂ nanoparticles using a hydrothermal method, thus forming a MoS₂/TiO₂ heterojunction composite catalyst. The structural and optical properties of the catalyst were characterized and analyzed by field-emission scanning electron microscopy, high-resolution transmission electron microscopy, X-ray powder diffraction, UV-Vis absorption spectra, Raman spectroscopy, and X-ray photoelectron spectroscopy. The activity of the photocatalyst was evaluated by its photocatalytic hydrogen production rate. The corresponding MoS₂ content of the catalyst was found to be 30%, and upon the exposure to 365nm UV light, a high photocatalytic hydrogen production rate of 1004 μmol^-1·h^-1·g^-1 was obtained. The catalytic rate is much greater than that obtained with MoS₂ or TiO₂ catalysts. The high hydrogen production rate indicated that the use of a MoS₂/TiO₂ composite catalyst can significantly improve the UV-induced photocatalytic hydrogen production performance. Because of the excellent photocatalytic hydrogen production performance of the MoS₂/TiO₂ composite, we studied and analyzed the hydrogen production mechanism.

Key words: TiO₂, MoS₂, Composite structure, Heterojunction, Photocatalytic hydrogen production

Chi ZHANG,Zhi-Jiao WU,Jian-Jun LIU,Ling-Yu PIAO. Preparation of MoS₂/TiO₂ Composite Catalyst and Its Photocatalytic Hydrogen Production Activity under UV Irradiation[J]. Acta Phys. -Chim. Sin. 2017, 33(7), 1492-1498. doi: 10.3866/PKU.WHXB201704141

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Preparation of MoS₂/TiO₂ Composite Catalyst and Its Photocatalytic Hydrogen Production Activity under UV Irradiation

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Preparation of MoS₂/TiO₂ Composite Catalyst and Its Photocatalytic Hydrogen Production Activity under UV Irradiation