Bi₂MoO₆ microtubes: Controlled fabrication by using electrospun polyacrylonitrile microfibers as template and their enhanced visible light photocatalytic activity

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• 作者：Mingyi Zhang ; Changlu Shao ; ^{clshao@nenu.edu.cn} ; Peng Zhang ; Chunyan Su ; Xin Zhang ; Pingping Liang ; Yangyang Sun ; Yichun Liu
• 关键词：Electrospinning ; Microtubes ; Bi2MoO6 ; Photocatalytic ; Recyclability
• 刊名：Journal of Hazardous Materials
• 出版年：2012
• 出版时间：30 July, 2012
• 年：2012
• 卷：225-226
• 期：Complete
• 页码：155-163
• 全文大小：2231 K

文摘

In this paper, Bi₂MoO₆ microtubes (BMO-MTs) were obtained by a two-step fabrication route. By using the electrospun polyacrylonitrile (PAN) microfibers as structure-directing hard template and through ethylene glycol solvothermal method, polyacrylonitrile/Bi₂MoO₆ (PAN/BMO) hybrid microfibers with core-shell structures were prepared. Through heat treatment of the as-prepared PAN/BMO to remove the PAN core, Bi₂MoO₆ with tubes-structured were obtained. The thickness of BMO-MTs was controlled by changing the Bi₂MoO₆ loading percentage of PAN/BMO which could be obtained through ethylene glycol solvothermal process with precursor different concentration for the preparation of Bi₂MoO₆. And, the crystal structure and morphology of BMO-MTs strongly depended on the calcination temperature when heat-treating the as-prepared PAN/BMO. Photocatalytic tests show that the BMO-MTs possess a much higher degradation rate of Rhodamine B (RB) than that of Bi₂MoO₆ prepared by solid-state reaction and conventional P25. The improved photocatalytic performance could be ascribed to the hollow multi channelled structure and large surface area. The BMO-MTs could be reclaimed easily by sedimentation from the photocatalytic reaction solution due to the large length to diameter ratio of one-dimensional tubes structures. Moreover, such simple and versatile strategy can provide a general way to fabricate other tubes structures of Bi(III)-containing oxides, such as Bi₂WO₆ and BiVO₄ microtubes.