Fabrication and photocatalytic ability of an Au/TiO2/reduced graphene oxide nanocomposite

2018年第12卷第1期

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《环境科学与工程前沿（英文）》 >> 2018年第12卷第1期 doi: 10.1007/s11783-017-0977-8

Fabrication and photocatalytic ability of an Au/TiO₂/reduced graphene oxide nanocomposite

. School of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China.. Key Laboratory of Mariculture & Stock Enhancement in North China’s Sea, Ministry of Agriculture, Dalian 116023, China.. Fujian Provincial Key Laboratory of Ecology-Toxicological Effects & Control for Emerging Contaminants, Putian 351100, China.. Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China

发布日期： 2017-08-01

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摘要

A new type of Au/TiO /reduced graphene oxide (RGO) nanocomposite was fabricated by the hydrothermal synthesis of TiO on graphene oxide followed by the photodeposition of Au nanoparticles. Transmission electron microscopy images showed that Au nanoparticles were loaded onto the surface of both TiO and RGO. Au/TiO /RGO had a better photocatalytic activity than Au/TiO for the degradation of phenol. Electrochemical measurements indicated that Au/TiO /RGO had an improved charge transfer capability. Meanwhile, chemiluminescent analysis and electron spin resonance spectroscopy revealed that Au/TiO /RGO displayed high production of hydrogen peroxide and hydroxyl radicals in the photocatalytic process. This high photocatalytic performance was achieved via the addition of RGO in Au/TiO /RGO, where RGO served not only as a catalyst support to provide more sites for the deposition of Au nanoparticles but also as a collector to accept electrons from TiO to effectively reduce photogenerated charge recombination.

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Reduced graphene oxide ; Au ; TiO₂ ; Nanocomposite ; Photocatalysis