3D Flowerlike 伪-Fe2O3@TiO2 Core鈥揝hell Nanostructures: General Synthesis and Enhanced Photocatalytic Performance

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• 作者：Jun Liu ; Shuanglei Yang ; Wei Wu ; Qingyong Tian ; Shuyuan Cui ; Zhigao Dai ; Feng Ren ; Xiangheng Xiao ; Changzhong Jiang
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2015
• 出版时间：November 2, 2015
• 年：2015
• 卷：3
• 期：11
• 页码：2975-2984
• 全文大小：871K
• ISSN：2168-0485

文摘

The 3D flowerlike 伪-Fe₂O₃@TiO₂ core鈥搒hell nanocrystals with thorhombic, cubic, and discal morphologies are synthesized for photocatalytic application. 伪-Fe₂O₃ nanocrystals were prepared via a Cu²⁺, Zn²⁺, and Al³⁺ ion-mediated hydrothermal route. The 伪-Fe₂O₃@TiO₂ core鈥搒hell nanocrystals are obtained via a hydrothermal and annealing process. The shape-dependent photocatalytic activities of these as-obtained 伪-Fe₂O₃@TiO₂ core鈥搒hell nanocrystals are measured. The results reveal that the discal 伪-Fe₂O₃@TiO₂ nanocrystals exhibit the best photocatalytic activity relative to the other two core鈥搒hell nanocrystals because the discal 伪-Fe₂O₃ nanocrystals possess more rough surface and surface defects. The fast interfacial charge-transfer process and the wide spectral response could be the driving force for the enhanced photocatalytic performance. These core鈥搒hell architectures provide a positive example for synthesis of novel composite nanomaterial.