摘要
光催化降解已成为污水处理领域发展最快的方法。为改善TiO_(2)的光催化性能,采用溶胶-凝胶法制备石墨烯(GN)/TiO_(2)复合材料,利用XRD、SEM对样品的微观结构进行表征,研究制备过程中煅烧温度、煅烧时间以及石墨烯含量对GN/TiO_(2)复合材料光催化性能的影响。结果表明:所制备TiO_(2)为球状形貌,粒径为70~200 nm,分布在石墨烯的片层和边缘。当煅烧温度为500℃,煅烧时间为20 min,石墨烯含量为5%时对甲基蓝(MB)的光催化降解率最高,为87.21%。此外,研究了GN/TiO_(2)复合材料对甲基蓝光催化降解的重复利用率,并探讨了光催化机理,结果表明重复使用5次后,对甲基蓝的降解率降低了17.64个百分点。
Photocatalytic degradation has become the fastest developing method in the field of wastewater treatment.GN/TiO_(2) composites were prepared by sol-gel method in order to improve the photocatalytic performance of TiO_(2) and the degradation effect of the composites on methyl blue was studied.The microstructure of the sample was characterized by XRD and SEM.The effects of calcination temperature,calcination time and the content of graphene on the photocatalytic performance of GN/TiO_(2) composites were investigated.The experimental results show that TiO_(2) is spherical with a size of 70~200 nm and distributing on the lamellar and edge of the graphene.When kept at 500℃for 20 min and the concentration of graphene is 5%,the material has the best photocatalytic performance on the degradation rate of methyl blue with the value of 87.21%.Moreover,the reutilization rate and the mechanism of photocatalytic degradation of methyl blue by GN/TiO_(2) composites were studied,and the results show that the degradation rate of methyl blue is reduced by 17.64%after 5 times repeated.
作者
高微
王俊
李玉峰
唐伟伟
张喆
Gao Wei;Wang Jun;Li Yufeng;Tang Weiwei;Zhang Zhe(School of Biology and Chemistry Engineering,Panzhihua University,Panzhihua,617000,Sichuan,China;College of Materials Science and Engineering,Heilongjiang University of Science and Technology,Harbin 150022,Heilongjiang,China)
出处
《钢铁钒钛》
CAS
北大核心
2022年第2期56-61,67,共7页
Iron Steel Vanadium Titanium
基金
攀枝花市指导性科技计划项目(2021ZD-G-10)
黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2018092)。
