南京大学学报（自然科学版）2016，Vol.52Issue(6)：1097-1103,7.DOI:10.13232/j.cnki.jnju.2016.06.013
还原氧化石墨烯-TiO2复合纳米材料制备与光催化性能
Preparation and photocatalytic properties of reduced graphene oxide-TiO2 nanocomposites
摘要
Abstract
The photocatalytic degradation of organic compounds has attracted great attention.In this work,the photo-catalytic activity of TiO2 was significantly improved via modification with reduced graphene oxide(RGO).The RGO/TiO2 nanocomposite,with varying RGO contents,was firstly fabricated by a solvothermal method.X-ray dif-fraction,high resolution transmission electron microscopy,Fourier transform infrared spectroscopy and UV-Vis spectroscopy were performed to characterize the structure and property of the as-prepared RGO/TiO2 nanocomposite.Based on a methyl orange model,the influence from different factors,including the RGO content and catalytic time,on photocatalytic activities as well as anti-Escherichia coli ability of the RGO/TiO2 nanocomposite, was investigated.The results show the binding between TiO2 nanostructures and RGO planes with C-O-Ti bonds within the nanocomposite after being calcined at 180°C for 6 h.The RGO/TiO2 nanocomposites consisting of an initial adding amount of 40 mg GO during synthesis process have a most enhanced photocatalytic degradation efficiency of as high as 50%.This might be due to the great adsorptivity of dyes,extended light absorption range and efficient charge separation properties.Also,a much improved anti-Escherichia coli ability of 93% was achieved by the same RGO/TiO2 nanocomposites.This work provides a new approach for the fabrication of TiO2-based nano-composite as visible-light photocatalyst of high performance,and facilitates its application for photocatalytic degradation of organic compounds.关键词
光催化降解/还原氧化石墨烯/二氧化钛/抑菌Key words
photocatalytic degradation/reduced graphene oxide/titanium oxide/antimicrobial分类
化学化工引用本文复制引用
陆乃彦,张亚强,吴世嘉..还原氧化石墨烯-TiO2复合纳米材料制备与光催化性能[J].南京大学学报（自然科学版）,2016,52(6):1097-1103,7.基金项目
粮食公益性行业科研专项(201513006-03),国家自然科学基金(31401589,31401576),江苏省食品安全与质量控制协同创新中心项目 （201513006-03）
