还原氧化石墨烯@Ag_2O改性TiO_2基复合材料的制备及其可见光催化性能  

Preparation of reduced graphene oxide@Ag_2O modified TiO_2-based composites and their visible light photocatalytic properties

作　　者：周云 欧阳晓平 王媛[2] 刘利新[2] 祝文军[2] 

机构地区：[1]湘潭大学材料科学与工程学院,湘潭411105 [2]中国工程物理研究院流体物理研究所,绵阳621900

出　　处：《复合材料学报》2018年第2期384-390,共7页Acta Materiae Compositae Sinica

基　　金：中国工程物理研究院压缩科学项目(YK2015-0602001);国家自然科学基金(11704354)

摘　　要：制备了还原氧化石墨烯(rGO)@Ag_2O共同改性TiO_2基复合材料(rGO@Ag_2O/TiO_2),并研究了其可见光催化性能。结果表明,三元复合材料rGO@Ag_2O/TiO_2的可见光催化性能远优于一元纳米TiO_2和二元rGO/TiO_2、Ag_2O/TiO_2复合材料,当可见光照射120min后,溶液中约100%的罗丹明B分子被rGO@Ag_2O/TiO_2降解。rGO@Ag_2O/TiO_2三元复合材料可见光催化效率的提高主要源于窄带隙半导体Ag_2O和高电导率材料rGO的引入,使形成的rGO@Ag_2O/TiO_2三元复合材料具有强的可见光吸收能力和光生电子空穴对分离能力。The reduced graphene oxide@Ag2O co-modified TiO2-based composites（rGO@Ag2O/TiO2）were successfully synthesized,whose photocatalytic performance under visible light irradiation were also tested.The ternary rGO@Ag2O/TiO2 composites show much higher visible light photocatalytic activity than the pure TiO2 and rGO/TiO2、Ag2O/TiO2 binary composites,of which almost 100% Rhodamine B（RhB）molecules were decomposed by the rGO@Ag2O/TiO2 composites after 120 min visible light irradiation.Due to the introduction of the narrow gap semiconductor Ag2O and the admirable electron conductivity rGO,so the rGO@Ag2O/TiO2 ternary composites have strong visible light absorption ability and potent separation of electron-holes pairs,the ternary rGO@Ag2O/TiO2 composites show much higher visible light photocatalytic activity.

关 键 词：还原氧化石墨烯 AG2O TIO2 光催化剂 半导体 异质结 罗丹明B 

分 类 号：O611.6[理学—无机化学]