Hierarchical BiF3鈥揃i2NbO5F Core鈥揝hell Structure and Its Application in the Photosensitized Degradation of Rhodamine B under Visible Light Irradiation

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• 作者：Shuijin Lei ; Chuanning Wang ; Di Cheng ; Xijie Gao ; Lianfu Chen ; Yutao Yan ; Jianliang Zhou ; Yanhe Xiao ; Baochang Cheng
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：January 8, 2015
• 年：2015
• 卷：119
• 期：1
• 页码：502-511
• 全文大小：602K
• ISSN：1932-7455

文摘

Catalytic photodegradation has been found to be a versatile, low-cost, and green technology for environmental decontamination. Bismuth-based compounds have attracted a lot of attention for their efficient photocatalytic properties. It is always of great importance to develop new catalysts in the photodegradation field. In this research, hierarchical porous BiF₃鈥揃i₂NbO₅F core鈥搒hell structures have been successfully prepared via a simple solvothermal route. A possible growth mechanism for the core鈥搒hell structure was proposed based on time-dependent-evolution experiments. X-ray powder diffraction was used to determine the phase composition. Scanning electron microscopy and transmission electron microscopy were employed to characterize the morphologies of the as-prepared samples. Experiments demonstrated that the volume ratio of ethylene glycol to water played a determinative role in the final morphology of the products. The band gap of the as-prepared BiF₃鈥揃i₂NbO₅F composite was estimated to about 3.47 eV. The novel hierarchical BiF₃鈥揃i₂NbO₅F core鈥搒hell structures could serve as a catalyst for photosensitized degradation of Rhodamine B under visible light irradiation. Moreover, the photodegradation efficiency of the samples was greatly associated with their surface morphology.