Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (5): 577-582.DOI: 10.11944/j.issn.1000-0518.2016.05.150296

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Photocatalytic Degradation of Methylene Blue Wastewater by Novel Polyoxometalates Salt

SHI Shuyun,REN Baixing()   

  1. College of Environmental Science and Engineering,Jilin Normal University,Siping,Jilin 136000,China
  • Received:2015-08-17 Accepted:2015-12-23 Published:2016-04-29 Online:2016-04-29
  • Contact: REN Baixing
  • Supported by:
    Supported by Jilin Provincial Science & Technology Department(No.20130101033JC)

Abstract:

[PMo8V6O42][Co(Phen)2][Him]2·2H3O·3H2O(1) was prepared by hydrothermal synthesis method and characterized by means of IR, Raman, UV, XRD and XPS. Its photocatalytic performance toward degradation of methylene blue wastewater was investigated. Under the optimized conditions, i.e., catalyst dosage of 50 mg/L, 4 mg/L methylene blue at pH=1 and the reaction time 220 min, 99.2% of the methylene blue is degraded photocatalytically. The kinetics of the photodegradation of methylene blue is satisfied by the pseudo-first-order equation, with a constant at 0.0144 min-1, and fitting coefficient of 0.9918. The photocatalyst also exhibits good reusability. The degradation rate for methylene blue still keeps at 92.4% after 4 recycles.

Key words: hydrothermal, polyoxometalate salt, methylene blue, photocatalysis, degradation