Ag₂O nanoparticle-decorated TiO₂ nanobelts for improved photocatalytic performance

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• 作者：Haiyan He ; Yanping Miao ; Yingying Du ; Jie Zhao ; Yunshi Liu ; Ping Yang ; ^{mse_yangp@ujn.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：B. Composites ; C. Corrosion ; D. TiO2 ; E. Substrates
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：42
• 期：1
• 页码：97-102
• 全文大小：2045 K

文摘

TiO₂ nanobelts with uniform morphology were prepared via a hydrothermal method, and subsequent sulfuric acid treatment procedure was needed for the coarse surface. A nanocomposite of highly dispersed Ag₂O nanoparticles on TiO₂ nanobelts was designed with a wet-chemical deposition precipitation method. As-prepared samples were systematically characterized by field emission scanning electron microscope, transmission electron microscope, X-ray diffraction and photoluminescence spectra. The photocatalytic performance was investigated under UV light toward degradation of methyl orange (MO) dye aqueous solution. Compared with the pure TiO₂ nanobelts, the Ag₂O/TiO₂ nanobelts represented a quick degradation rate for MO dye, and the best photocatalytic activity was obtained when the molar ratio value of Ag₂O and TiO₂ was 0.17. The enhanced photocatalytic activity could give the credit to the formation of heterostructure between Ag₂O nanoparticles and TiO₂ nanobelts, in which the Ag₂O nanoparticles acted as electron capture agent to promote the separation of photoinduced electrons and holes.