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Environmental Science and Pollution Research

, Volume 26, Issue 8, pp 8226–8236 | Cite as

Construction of precious metal-loaded BiOI semiconductor materials with improved photocatalytic activity for microcystin-LR degradation

  • Fan Zhang
  • Hui Peng
  • Shanqing Jiang
  • Chuqiao Wang
  • Xia Xu
  • Liping WangEmail author
Research Article
  • 153 Downloads

Abstract

The composite photocatalyst of precious metal loaded on BiOI (M/BiOI, M = Pt, Au, Ag) was prepared by photochemical deposition and used for the photocatalytic degradation of microcystins (MC-LR). The material was characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), ultraviolet visible (UV-vis) diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy (XPS), and photoluminescence spectra (PL). The effect of photodegradation of MC-LR and the possible mechanism were investigated. It turned out that, among precious metals of Pt, Au, and Ag, Ag had the most significant improvement for photocatalytic activity of BiOI and Au was the least. The Ag/BiOI catalyst was illuminated 2 h under the simulated visible-light condition with the optimal load ratio of Ag catalyst (1.0 wt%) and the 2-h illumination under simulated visible-light condition, the degradation rate of MC-LR was 61.26% ± 0.12%. In addition, through the experiment of trapping agent and the analysis of electron spin resonance (ESR), we could conclude that the main active species is O2 in the process of the degradation of MC-LR by three precious metal-loaded BiOI semiconductor materials.

Keywords

Precious metals BiOI Microcystin-LR Photocatalysis 

Notes

Funding information

this study is financially supported by the National Natural Science Foundation of China (Nos. 21477050 and 21607017) and the International Scientific and Technological Cooperation in Changzhou (CZ20140017).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Fan Zhang
    • 1
  • Hui Peng
    • 1
  • Shanqing Jiang
    • 1
  • Chuqiao Wang
    • 1
  • Xia Xu
    • 1
  • Liping Wang
    • 1
    Email author
  1. 1.School of Environmental and Safety EngineeringChangzhou UniversityChangzhouPeople’s Republic of China

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