摘要
采用超声溶胶-凝胶法制备了新型复合光催化剂TiO_2-GR/MgO。采用XRD、SEM、PL、UV-Vis等手段对制备的催化剂进行了表征,并在太阳光下考察了TiO_2-GR/MgO对刚果红的光催化降解性能。结果表明:在TiO_2-GR/MgO中,TiO_2只有锐钛矿型,石墨和MgO的加入有效阻碍了电子/空穴的复合速率,拓宽了复合光催化剂的光谱响应范围,提高了催化剂对可见光的吸收效率。当反应时间为80 min,TiO_2-GR/MgO投加量为2.5 g/L时,在太阳光照射下刚果红去除率可达97.6%。
A new composite photocatalyst TiO2-GR/MgO has been prepared by ultrasound sol-gel method,characterized by means of XRD,SEM,PL and UV-Vis,and the photocatalytic degradation capability of TiO2-GR/MgO for Congo red investigated under solar light. The results show that anatase is the only type of TiO2 in TiO2-graphite/MgO.The addition of graphite and MgO effectively hinders the electron/hole recombination rate,broadens the spectral response range of the composite photocatalyst,and improves the absorption efficiency for the visible light. When the reaction time is 80 min and TiO2-GR/MgO dosage 2.5 g/L,the removing rate of Cango red under solar light irradiation reaches 97.6%.
作者
饶砚迪
盛义平
周城
刘艳芳
张天虎
Rao Yandi;Sheng Yiping;Zhou Cheng;Liu Yanfang;Zhang Tianhu(School of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao 066004,China;Qinhuangdao Glass Industry Research and Design Institute,Qinhuangdao 066001,China;School of Civil Engineering and Mechanics,Yanshan University,Qinhuangdao 066004,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2019年第2期50-54,共5页
Industrial Water Treatment
基金
河北省自然科学基金资助项目(B2015203300)
秦皇岛市科学技术研究与发展计划项目(201602A013)
中国博士后科学基金项目(2017M611189)
