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祝贺赵鑫宇博士Environmental Science: Nano接收
发布时间:2021-11-12

祝贺赵鑫宇博士题为:Polyoxometalates-doped TiO2/Ag hybrid heterojunction: removal of multiple pollutants and mechanism investigation的文章在Environmental Science: Nano接收,发表

Photocatalysis is considered to be an effective and sustainable way to purify a variety of refractory pollutants. However, the construction of a versatile efficient photocatalyst is still an arduous challenge. Herein, a series of mesoporous TiO2 doped with polyoxometalates [PMo10V2O40]5- (PMV) and loaded with Ag nanoparticles composite photocatalysts PMV-TiO2/Agx (x represented the mass of AgNO3) are presented. In this composite, the polyoxoanions PMV are uniformly dispersed in mesoporous TiO2, which not only acts as a dopant to effectively expand the visible light absorption of TiO2, but also acts as a component to form S-scheme heterojunction with modified TiO2 to promote the separation of photogenerated carrier. Furthermore, the Schottky junction between Ag nanoparticles and PMV-doped TiO2 further enhance its carrier separation. The synergistic effect of the above factors endows PMV-TiO2/Agx with excellent photocatalytic activity. PMV-TiO2/Ag0.1 can completely degrade 10 ppm of 2,4-dichlorophenol in 180 minutes (λ ≥ 420 nm), which is about 8.3 times higher than that of traditional TiO2. In addition, PMV-TiO2/Ag0.1 also exhibits ultrahigh photocatalytic performance and durability for the photocatalytic removal of 2,4-difluorophenol, 2,4-dibromophenol, hexafluorobisphenol A, tetracycline, K2Cr2O7, methyl orange, which is an excellent photocatalyst with high efficiency and universal application.