稀土掺杂SnO_2/TS-1纳米光催化材料的合成及染料降解  

Synthesis and photocatalytic activity of SnO_2/TS-1 doped with rare earth metals for dye degradation

作　　者：周新晨 谭正德[1] 湛日梦 区泽棠[1] 罗志 ZHOU Xin-chen;TAN Zheng-de;ZHAN Ri-meng;OU Ze-tang;LUO Zhi(Department of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China)

机构地区：[1]湖南工程学院化学化工学院,湖南湘潭411104

出　　处：《印染》2018年第7期11-18,30,共9页China Dyeing and Finishing

基　　金：湖南省教改项目(湘教通[2016]400)

摘　　要：以SnCl_4·5H_2O为原料,钛硅分子筛TS-1为载体,镧和铈为掺杂元素,采用超声溶胶-凝胶法,制备出稀土掺杂的负载型纳米SnO_2。并对罗丹明B模拟废水进行光催化降解,以降解率为考量对象,优化了催化剂的制备条件为:pH值7~8,SnCl_4∶TS-1∶La∶Ce=1∶1∶0.02∶0.01,超声2h,陈化15h,80℃干燥,500℃焙烧2h,其负载量为30%。选择500W氙灯,催化剂0.30mg/mL,光照2h时,模拟染料废水罗丹明B的降解率达99.87%,且循环5次后,降解率达88.26%。同等条件下,同类工业染料酸性蓝、活性黑、RGFL黄、酸性红A-2BF的降解效果分别为99.85%、99.78%、96.15%和94.65%。SnO2/TS-1 doped with rare earth metals （La and Ce） are prepared by ultrasonic sol-gel method using SnCI4·5H20, lanthanum nitrate and cerium nitrate as raw materials, and titanium silicalite TS-I as a carrier. The influence of catalyst synthesis conditions on photocatalytic degradation of Rhodamine B is investigated. The preparation conditions of catalyst are optimized： pH value 7.0-8.0, ultrasonic for 2 h, ageing for 15 h, catcinating at 500 ℃ for 2 h and SnCl4：TS-1 ： La：Ce=l ： 1：0.02：0.01. With the catalyst load of 30 mg/mL, irradiation with a 500 W xenon lamp for 120 min, the degradation of Rhodamine B dye reaches 99.87%, and remains 88.26% even after five cycles reuse. As for industrial dyes such as acid blue, reactive black, RGFL Yellow and Acid Red A-2BF, the degradation reaches 99.85%, 99.78%, 96.15% and 94.65% respectively.

关 键 词：印染废水 稀土元素 负载 掺杂 光降解 染料 

分 类 号：TS199[轻工技术与工程—纺织化学与染整工程]