TiO_2/GO复合材料的制备及其催化性能研究  

Preparation and Characterization of TiO2/GO Composite Photocatalyst

作　　者：焦玉荣[1] 相玉琳[1] 邢艳[1] 弓莹[1] 张亚[1] 白小慧[1] 马亚军[1] 马向荣[1] 党睿[1] Jiao Yurong;Xiang Yulin;Xing Yan;Gong Ying;Zhang Ya;Bai Xiaohui;Ma Yajun;Ma Xiangrong;Dang Rui(College of Chemistry and Chemical Engineering,Yulin University,Yulin,Shaanxi 719000)

机构地区：[1]榆林学院化学与化工学院,陕西榆林719000

出　　处：《非金属矿》2021年第1期84-87,共4页Non-Metallic Mines

基　　金：留学回国人员科研启动项目([2015]1098);国家自然科学基金地区科学基金(21663033,41967022,51762042);陕西省科技厅科研计划项目(2017GY-131,2018GY-086,2020JM-627,);陕西省科技资源开放共享平台(2019PT-18);陕西省低变质煤洁净利用重点实验室项目(19JS070);榆林市产学研项目(2019-102-2,2019-83-3,2019-83-5,CXY-2020-002-02)。

摘　　要：采用改进Hummers法制备氧化石墨烯(GO),以钛酸丁酯为钛源,通过溶胶-凝胶法制备TiO_2/GO纳米复合光催化剂。利用傅里叶红外光谱(FTIR)、X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)和X射线能谱(EDS)等对催化剂的结构、组成、形貌和粒径进行表征。将催化剂用于光催化降解甲基橙(MO)溶液,考察催化剂种类、GO负载量和p H值对催化效果的影响。结果表明,TiO_2/GO复合光催化剂具有较高的光催化活性和良好的稳定性,1 mg/mL的TiO_2/GO复合催化剂对50 mL 10 mg/L MO溶液降解120 min,降解率为94.4%;催化降解过程符合一级动力学模型。The graphene oxide(GO)was prepared from graphite by a modified Hummers method,then TiO2/GO composites were prepared using butyl titanate as a precursor by the gel-sol method.The structure,composition,morphology and particle size of the composites were characterized by FT-IR,XRD,SEM,TEM and EDS.The photocatalytic properties of TiO2/GO composites were investigated by degrading methyl orange(MO)solution,and the experimental conditions such as different catalysts,load dosage of GO and pH value were researched.The results showed that TiO2/GO composites had high photocatalytic activity and good stability;the degradation rate of 1 mg/mL TiO2/GO composites degrading 50 mL 10 mg/L MO solution reached 94.4%within 120 min,and the degradation process accorded with the first-order kinetic model.

关 键 词：二氧化钛 氧化石墨烯 溶胶-凝胶法 光催化 甲基橙 

分 类 号：O644[理学—物理化学] TQ034[理学—化学]