Photocatalytic reduction of Cr(vi) by polyoxometalates/TiO₂ electrospun nanofiber composites
2014
Zhang, Duoying | Li, Xu | Tan, Huaqiao | Zhang, Guoqiang | Zhao, Zhao | Shi, Hongfei | Zhang, Lingtong | Yu, Weixing | Sun, Zaicheng
Polyoxometalates (Ti₀.₇₅PW₁₂O₄₀, Ti-PTA)/TiO₂ nanofiber composites were fabricated by a simple electrospinning technique and then high temperature calcination. In the structure, Ti-PTA, as an electron relay, can accept the photo-generated electrons from the conduction band of TiO₂, which promote the separation of photo-generated charges in TiO₂. Then the electrons stored on Ti-PTA further transfer to the Cr(vi) in the solution to realize the removal of Cr(vi). The Ti-PTA/TiO₂ nanofiber composites exhibit enhanced photocatalytic performance for photocatalytic reduction of Cr(vi), which might be a potential photocatalyst for Cr(vi) removal in environmental therapy.
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