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Catalysts 2017, 7(1), 30; doi:10.3390/catal7010030

Synergically Improving Light Harvesting and Charge Transportation of TiO2 Nanobelts by Deposition of MoS2 for Enhanced Photocatalytic Removal of Cr(VI)

1
School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
2
School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430072, China
3
Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Shaobin Wang and Xiaoguang Duan
Received: 16 December 2016 / Revised: 3 January 2017 / Accepted: 3 January 2017 / Published: 19 January 2017
(This article belongs to the Special Issue Heterogeneous Catalysis for Environmental Remediation)
View Full-Text   |   Download PDF [6192 KB, uploaded 19 January 2017]   |  

Abstract

Herein, MoS2/TiO2 nanobelts heterojunction have been successfully synthesized by in situ growth method for photocatalytic reduction of Cr(VI). TiO2 nanobelts (NBs) with rough surface were prepared firstly by acidic treatment process, which is beneficial for deposition and growth of MoS2 to form heterojunctions. As a result of special energy level offset and nanostructure, MoS2/TiO2 NBs composite were endowed with higher light-harvesting capacity and charge transportation efficiency, which are indispensible merits for excellent photocatalytic activity. The photocatalytic reduction of Cr(VI) reveals that the synthesized MoS2/TiO2 NBs composite have superior photocatalytic ability than other samples. Meanwhile, a photoreduction mechanism is proposed based on the systematic investigation, where the photogenerated electrons are demonstrated as the dominant reductive species to reduce Cr(VI) to Cr(III). View Full-Text
Keywords: environmental remediation; Cr(VI); photocatalysis; TiO2 NBs; MoS2 environmental remediation; Cr(VI); photocatalysis; TiO2 NBs; MoS2
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Liu, J.; Li, Y.; Ke, J.; Wang, Z.; Xiao, H. Synergically Improving Light Harvesting and Charge Transportation of TiO2 Nanobelts by Deposition of MoS2 for Enhanced Photocatalytic Removal of Cr(VI). Catalysts 2017, 7, 30.

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