Fabrication of GO/magnetic graphitic nanocapsule/TiO2 assemblies as efficient and recyclable photocatalysts

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• 作者：Zhenqian Cheng ; Ding Ding ; Xiangkun Nie ; Yiting Xu ; Zhiling Song…
• 关键词：magnetic graphitic nanocapsule ; graphene oxide ; TiO2 ; photocatalyst ; recyclability
• 刊名：SCIENCE CHINA Chemistry
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：58
• 期：7
• 页码：1131-1136
• 全文大小：974 KB
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• 作者单位：Zhenqian Cheng (1) (3)
  Ding Ding (1) (2)
  Xiangkun Nie (1) (3)
  Yiting Xu (1) (2)
  Zhiling Song (1) (2)
  Ting Fu (1) (3)
  Zhuo Chen (1) (2)
  Weihong Tan (1) (2) (3)
  
  1. Molecular Science and Biomedicine Laboratory; State Key Laboratory of Chemo/Bio-Sensing and Chemometrics; College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha, 410082, China
  3. College of Biology, Hunan University, Changsha, 410082, China
  2. College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Chinese Library of Science
  Chemistry
  
• 出版者：Science China Press, co-published with Springer
• ISSN：1869-1870

文摘

In this work, we fabricate an efficient and stable photocatalyst system which has superior recyclability even under concentrated acidic conditions. The photocatalyst is prepared by assembling magnetic graphitic nanocapsules, titania (TiO2) and graphene oxide (GO) into a complex system through π-π stacking and electrostatic interactions. Such catalytic complex demonstrates very high stability. Even after dispersal into a concentrated acidic solution for one month, this photocatalyst could still be recycled and maintain its catalytic activity. With methyl orange as the model molecule, the photocatalyst was demonstrated to rapidly decompose the molecules with very high photocatalytic activity under both concentrated acidic and neutral condition. Moreover, this photocatalyst retains approximately 100 wt% of its original photocatalytic activity even after multiple experimental runs, of magnetic recycling. Finally, using different samples from natural water sources and different dyes, this GO/magnetic graphitic nanocapsule/TiO2 system also demonstrates its high efficiency and recyclability for practical application.