Abstract

Bi₅O₇I nanoplates as visible-light-driven photocatalyst have been synthesized by PVP assisted hydrothermal method. The effect of weight content of PVP adding on phase, morphology, and photocatalytic activities of products has been studied. The products have been characterized by X-ray powder diffraction, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and selected area electron diffraction (SAED). In this research, the products have been specified as pure phase of orthorhombic Bi₅O₇I structure. The size of Bi₅O₇I plates has been controlled by the weight content of PVP adding. Photocatalytic activities of the samples have been investigated through photodegradation of methylene blue (MB) under visible light irradiation. The Bi₅O₇I nanoplates synthesized in the solution containing 0.50 g PVP show the highest photocatalytic activity for degradation of MB under visible light. A mechanism for photodegradation of MB by Bi₅O₇I is explained according to experimental results.

中文翻译：

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PVP辅助水热法合成Bi 5 O 7 I纳米板及其光催化活性

摘要

通过PVP辅助水热法合成了Bi ₅ O ₇ I纳米板作为可见光驱动的光催化剂。研究了PVP添加量对产品相，形态和光催化活性的影响。产品通过X射线粉末衍射，傅里叶变换红外（FTIR）光谱，X射线光电子能谱（XPS），透射电子显微镜（TEM）和选定区域电子衍射（SAED）进行了表征。在这项研究中，产品已被指定为正交晶Bi ₅ O ₇ I结构的纯相。Bi ₅ O ₇的大小I板已经由PVP添加的重量含量控制。通过在可见光照射下亚甲基蓝（MB）的光降解研究了样品的光催化活性。在含有0.50 g PVP的溶液中合成的Bi ₅ O ₇ I纳米板在可见光下显示出最高的MB降解光催化活性。根据实验结果解释了Bi ₅ O ₇ I对MB的光降解机理。