Nano

SKKU Advanced Institute of Nano Technology (성균관대학교 성균나노과학기술원)
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Preparation of Bi/Bi2MoO6 Plasmonic Photocatalyst with High Photocatalytic Activity Under Visible Light Irradiation

  • Zou, Chentao (College of Chemistry and Chemical Engineering Hubei Key Laboratory of Pollutant, Analysis & Reuse Technology Hubei Normal University) ;
  • Yang, Zhiyuan (College of Chemistry and Chemical Engineering Hubei Key Laboratory of Pollutant, Analysis & Reuse Technology Hubei Normal University) ;
  • Liang, Mengjun (College of Chemistry and Chemical Engineering Hubei Key Laboratory of Pollutant, Analysis & Reuse Technology Hubei Normal University) ;
  • He, Yunpeng (College of Chemistry and Chemical Engineering Hubei Key Laboratory of Pollutant, Analysis & Reuse Technology Hubei Normal University) ;
  • Yang, Yun (College of Chemistry and Chemical Engineering Hubei Key Laboratory of Pollutant, Analysis & Reuse Technology Hubei Normal University) ;
  • Yang, Shuijin (College of Chemistry and Chemical Engineering Hubei Key Laboratory of Pollutant, Analysis & Reuse Technology Hubei Normal University)
  • Received : 2018.06.28
  • Accepted : 2018.10.04
  • Published : 2018.11.30
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Abstract

Bi metal deposited on $Bi_2MoO_6$ composite photocatalysts have been successfully synthesized via a simple reduction method at room temperature with using $NaBH_4$ as the reducing agent. The photocatalytic activity of the composite was evaluated by degradation of rhodamine B (RhB) and bisphenol A (BPA) solution under visible light. The rate constant of $Bi/Bi_2MoO_6$ composite to RhB is 10.8 times that of $Bi_2MoO_6$, and the degradation rate constant of BPA is 6.9 times of that of $Bi_2MoO_6$. Nitrogen absorption-desorption isotherm proved that the increase of specific surface area is one of the reasons for the improvement of photocatalytic degradation activity of $Bi/Bi_2MoO_6$ composites. The higher charge transfer efficiency of $Bi/Bi_2MoO_6$ is found through the characterization of the photocurrent and impedance, which are attributed to the surface plasmon resonance (SPR) effect produced by the introduction of the metal Bi monomer in the composite. Free radical capture experiments proved that cavitation is the main active species. Based on the above conclusions, a possible mechanism of photocatalytic degradation is proposed.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Natural Science Foundation of Hubei Province, Hubei Normal University

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