Hydrothermal Synthesis and Photocatalytic Properties of Nano Bi2WO6/TiO2 Powers

Hai Feng Chen; Ting Yan

doi:10.4028/www.scientific.net/KEM.531-532.473

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 531-532Hydrothermal Synthesis and Photocatalytic...

Hydrothermal Synthesis and Photocatalytic Properties of Nano Bi₂WO₆/TiO₂ Powers

Abstract:

Using Bi(NO3)3•5H2O, Na2WO4•2H2O and Ti• (OC4H9)4 as the main raw materials, different alcohol solvent as medium, hexamethylene tetramine as sink set agent, tungsten bismuth and titanium dioxide composite powder were prepared by hydrothermal synthesis. It was characterized by XRD and DRS. The methyl orange imitated sewage, we study the impacts of calcinations’ temperature, catalyst amount, concentration, illumination time and pH on photocatalytic performance of Bi2WO6/TiO2 samples under visible light. The results showed that calcinations’ temperature 400 oC was the best, because the forbidden band gap decreased with temperature increased, but phase transition or decomposition exothermic of the samples would occurre at higher than 400 degree. The Bi2WO6/TiO2 prepared under acidic condition had only 2.41 eV as the smallest forbidden band gap of the samples.

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Periodical:

Key Engineering Materials (Volumes 531-532)

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473-476

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.531-532.473

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Online since:

December 2012

Authors:

Hai Feng Chen, Ting Yan

Keywords:

Bi₂WO₆, Hydrothermal Method, Photocatalytic, TiO₂

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