有序介孔三氧化二铟/还原氧化石墨烯纳米复合材料的制备及可见光催化性能  

Preparation and Visible Light Photocatalytic Performance of Ordered Mesoporous Indium Dioxide / Reduced Graphene Oxide Nanocomposite

作　　者：丁敏娟[1,2] 黄徽[2] 杨平[2] 

机构地区：[1]南通农业职业技术学院环境与资源系,南通226007 [2]苏州大学材料与化学化工学部,苏州215123

出　　处：《高等学校化学学报》2015年第5期989-995,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21373143);江苏省自然科学基金(批准号:BK2010209);江苏省青蓝工程(批准号:苏教师[2012]16号)资助~~

摘　　要：以有序介孔三氧化二铟(m-In2O3)和还原氧化石墨烯(RGO)为原料,采用紫外光照射法合成了介孔三氧化二铟/还原氧化石墨烯(m-In2O3-RGO)复合光催化剂.利用N2吸附-脱附、X射线衍射(XRD)、透射电子显微镜(TEM)、漫反射吸收光谱(DRS)和光电流测试等手段对样品进行表征.在可见光照射下,以对氯苯酚(4-CP)为目标污染物,考察了m-In2O3-RGO光催化剂的催化性能.结果表明,m-In2O3-RGO光催化剂具有完整的晶型和规则的孔道结构,有利于光生电子和空穴的分离.同时,作为固态电子受体与传输体的RGO促进了光生电子-空穴对的传输和分离,有效提高了可见光催化性能.掺杂2%(质量分数)RGO的复合光催化剂性能最佳,4 h可将4-CP降解96%以上,催化剂经多次循环使用后,其光催化活性基本保持不变.Ordered mesoporous indium dioxide（m-In2O3） /reduced graphene oxide（RGO） nanocomposites（m-In2O3-RGO） were prepared by a facile UV-assisted photoreduction method.The as-prepared samples were characterized by N2adsorption-desorption,X-ray diffraction,transmission electron microscopy,UV-Vis diffuse reflectance spectroscopy and photocurrent techniques.Photocatalytic properties of m-In2O3-RGO nanocomposite were studied under different conditions by using 4-chlorophenol（4-CP） as target pollutant under visible light irradiation.The results indicate that m-In2O3-RGO nanocomposite equip with high crystallinity and continuous pore channels,which provide a short distance for photogenerated charge carriers transfer.Simultaneously,RGO acts herein as a solid-state electron mediator,promoting the charge transportation and separation,as well as suppressing the electron-hole recombination in the composite.Under visible light irradiation,the photodegradation rate of 4-CP from the optimized photocatalyst containing ca.2%（mass fraction） RGO reached to 96%.Meanwhile,the photocatalyst could be recycled several times without losing its photocatalytic performance.

关 键 词：介孔三氧化二铟 还原氧化石墨烯 纳米复合物 可见光催化 

分 类 号：O643[理学—物理化学]