银掺杂二氧化钛/活性炭复合材料的制备及其光催化性能研究  

Study on preparation of silver-doped titanium dioxide/activated carbon composite material and its photocatalytic performance

作　　者：付勇 徐文奇 赵强 冉瑞泉 李军[2,3] 金央[2,3] FU Yong;XU Wenqi;ZHAO Qiang;RAN Ruiquan;LI Jun;JIN Yang(Wengfu Dazhou Chemical Co.,Ltd,Dazhou 635000,China;School of Chemical Engineering,Sichuan University;Engineering Research Center for Comprehensive Utilization and Cleaning Process of Phosphate Resource,Ministry of Education)

机构地区：[1]瓮福达州化工有限责任公司,四川达州635000 [2]四川大学化学工程学院 [3]教育部磷资源综合利用与清洁加工工程研究中心

出　　处：《无机盐工业》2022年第2期117-122,共6页Inorganic Chemicals Industry

基　　金：国家自然科学基金资助项目(21776180);四川省科技计划项目重点研发项目(21ZDYF4086)。

摘　　要：为提高二氧化钛/活性炭(AC)复合材料对可见光的利用率,基于溶胶-凝胶法制备了银掺杂的二氧化钛/活性炭复合光催化剂。利用一系列测试方法对光催化剂进行了表征,通过亚甲基蓝(MB)和Cr(Ⅵ)废水的降解效果研究了其光催化活性。结果表明,掺杂银的材料,吸附性能和可见光下的光催化性能均得到提升。在材料投加量为400 mg/L情况下,银-二氧化钛/AC复合光催化剂在30 min内对10 mg/L MB溶液的降解率达到98.55%,在60 min内对20 mg/L MB溶液、10 mg/L Cr(Ⅵ)溶液的降解率分别达到76.92%和53.90%;与未掺杂的材料相比,降解率分别提升了14%、47%、137%。这是由于Ag纳米颗粒可以有效地俘获价带电子,减少电子空穴的复合,从而提高了光催化效果。To improve the visible light utilization of TiO2/activated carbon composite material,Ag-doped TiO2/activated carbon composite photocatalyst was prepared based on the sol-gel method.A series of analysis methods were used to characterize the photocatalyst,and its photocatalytic activity was studied through the degradation effect of methylene blue and Cr( Ⅵ )wastewater.The results showed that the Ag-doped material had improved adsorption performance and photocatalytic performance under visible light.When the material dosage was 400 mg/L,the degradation rate of 10 mg/L MB solution by Ag-TiO_(2)/AC composite photocatalyst was 98.55% within 30 min,and the degradation rates of 20 mg/L MB solution and 10 mg/L Cr(Ⅵ)solution reached 76.92% and 53.90% within 60 min respectively.Compared with the undoped materials,the degradation rates increased by 14%,47% and 137%,respectively.This was because Ag nanoparticles could effectively capture valence electrons and reduce the recombination of electrons and holes,thus improving the photocatalytic effect.

关 键 词：银掺杂 二氧化钛 活性炭 可见光 光催化 

分 类 号：TQ131.2[化学工程—无机化工]