Organic Additives-Free Hydrothermal Synthesis and Visible-Light-Driven Photodegradation of Tetracycline of WO3 Nanosheets

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• 作者：Gehong Zhang ; Weisheng Guan ; Hao Shen ; Xian Zhang ; Weiqiang Fan ; Changyu Lu ; Hongye Bai ; Lisong Xiao ; Wei Gu ; Weidong Shi
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：April 2, 2014
• 年：2014
• 卷：53
• 期：13
• 页码：5443-5450
• 全文大小：443K
• 年卷期：v.53,no.13(April 2, 2014)
• ISSN：1520-5045

文摘

In our work, we have successfully synthesized WO₃ nanosheets via a simple, fast, and organic additives-free hydrothermal method. The obtained products are 200鈥?00 nm-sized with square corners and high crystallinity. A possible formation mechanism of WO₃ nanosheets is discussed in this study based on the experimental results and our understanding. WO₃ nanosheets modified with Pt exhibit enhanced photocatalytic activity of tetracycline compared with bare WO₃ nanosheets under visible-light irradiation (位 > 420 nm). Furthermore, the effects of Pt as cocatalyst can be clearly drawn, and the degradation ratio of 2% Pt/WO₃ nanosheets is over 3 times that of bare WO₃ nanosheets, which is reasonable to expect the obvious Pt-dependent activity. The addition of 10 mL of iso-propanol leads to a considerable decreased degradation ratio (DR) of tetracycline (TC) on 2% Pt/WO₃ photocatalysts, further indicating the 路OH radicals do exist in the process of the photocatalytic oxidation (PCO) of TC.