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Issue 108, 2016
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Facile synthesis of MoS2/B-TiO2 nanosheets with exposed {001} facets and enhanced visible-light-driven photocatalytic H2 production activity

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Abstract

Cocatalysts have been extensively used to accelerate the rate of hydrogen evolution in semiconductor-based photocatalytic systems; however, the influence of interface states between the semiconductor and cocatalyst has rarely been investigated. Herein, we demonstrated a feasible strategy of heterogeneous structure to enhance visible light hydrogen generation of the MoS2/B-TiO2 system. Loading of MoS2 nanosheets on the surface of anatase boron doped TiO2 (B-TiO2) nanosheets with exposed {001} facets considerably increases the interfacial contact. At an optimal ratio of 1.0 wt% MoS2, the MoS2/B-TiO2 hybrid photocatalyst showed the highest H2 evolution rate of 0.50 mmol h−1 g−1, which is almost 6 times higher than that of pure B-TiO2 nanosheets. More importantly, the MoS2/B-TiO2 hybrid photocatalyst exhibited photocatalytic activity much higher than that of Pt/B-TiO2 nanosheets and the simple mechanical mixing of B-TiO2 and MoS2 nanosheets photocatalysts. The decisive factor in improving the photocatalytic H2 production activity is an intimate and large contact interface between the light-harvesting semiconductor and cocatalyst. The effective charge transfers from B-TiO2 to MoS2 was demonstrated by the significant enhancement of the photocurrent responses in MoS2/B-TiO2 hybrid electrodes. This study created new opportunities for designing and constructing highly efficient visible light photocatalysts by surface modification or doping.

Graphical abstract: Facile synthesis of MoS2/B-TiO2 nanosheets with exposed {001} facets and enhanced visible-light-driven photocatalytic H2 production activity

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Article information


Submitted
25 Sep 2016
Accepted
26 Oct 2016
First published
09 Nov 2016

RSC Adv., 2016,6, 107075-107080
Article type
Paper

Facile synthesis of MoS2/B-TiO2 nanosheets with exposed {001} facets and enhanced visible-light-driven photocatalytic H2 production activity

X. Yang, H. Huang, B. Jin, J. Luo and X. Zhou, RSC Adv., 2016, 6, 107075
DOI: 10.1039/C6RA23838F

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