Nano

SKKU Advanced Institute of Nano Technology (성균관대학교 성균나노과학기술원)
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Few-Layered MoS2 Nanoparticles Loaded TiO2 Nanosheets with Exposed {001} Facets for Enhanced Photocatalytic Activity

  • Chen, Chujun (School of Physics and Information Technology Shaanxi Normal University) ;
  • Xin, Xia (School of Physics and Information Technology Shaanxi Normal University) ;
  • Zhang, Jinniu (School of Physics and Information Technology Shaanxi Normal University) ;
  • Li, Gang (School of Physics and Information Technology Shaanxi Normal University) ;
  • Zhang, Yafeng (School of Physics and Information Technology Shaanxi Normal University) ;
  • Lu, Hongbing (School of Physics and Information Technology Shaanxi Normal University) ;
  • Gao, Jianzhi (School of Physics and Information Technology Shaanxi Normal University) ;
  • Yang, Zhibo (School of Physics and Information Technology Shaanxi Normal University) ;
  • Wang, Chunlan (School of Science, Xi'an Polytechnic University) ;
  • He, Ze (School of Physics and Information Technology Shaanxi Normal University)
  • Received : 2018.07.18
  • Accepted : 2018.10.05
  • Published : 2018.11.30
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Abstract

To improve the high charge carrier recombination rate and low visible light absorption of {001} facets exposed $TiO_2$ [$TiO_2(001)$] nanosheets, few-layered $MoS_2$ nanoparticles were loaded on the surfaces of $TiO_2(001)$ nanosheets by a simple photodeposition method. The photocatalytic activities towards Rhodamine B (RhB) were investigated. The results showed that the $MoS_2-TiO_2(001)$ nanocomposites exhibited much enhanced photocatalytic activities compared with the pure $TiO_2(001)$ nanosheets. At an optimal Mo/Ti molar ratio of 25%, the $MoS_2-TiO_2(001)$ nanocomposites displayed the highest photocatalytic activity, which took only 30 min to degrade 50 mL of RhB (50 mg/L). The active species in the degradation reaction were determined to be $h^+$ and $^{\bullet}OH$ according to the free radical trapping experiments. The reduced charge carrier recombination rate, enhanced visible light utilization and increased surface areas contributed to the enhanced photocatalytic performances of the 25% $MoS_2-TiO_2(001)$ nanocomposites.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Central Universities, Xi'an Polytechnic University

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