溶胶-凝胶法制备Bi_4Ti_3O_(12)/SiO_2及其光催化性能  

Sol-gel Synthesis of Bi_4Ti_3O_(12)/SiO_2 and Its Photocatalytic Activity

作　　者：王宏[1] 毕菲非 杨丽丽[1] 张文杰[1] 

机构地区：[1]沈阳理工大学环境与化学工程学院,沈阳110159

出　　处：《材料研究学报》2016年第9期675-680,共6页Chinese Journal of Materials Research

基　　金：国家自然科学基金青年基金51504154;辽宁省自然科学基金2015020186;辽宁省废水治理技术重点实验室开放基金4771004kfs资助项目~~

摘　　要：采用溶胶-凝胶法制备石英砂负载Bi_4Ti_3O_(12)/SiO_2光催化材料,研究负载对Bi_4Ti_3O_(12)的物理性质和光催化活性的影响。结果表明,负载后的层状钙钛矿结构Bi_4Ti_3O_(12)包覆在非晶态石英砂球体表面,Bi_4Ti_3O_(12)中各元素的电子结合能没有发生改变。活性艳红X-3B在纯Bi_4Ti_3O_(12)和不同负载量x Bi_4Ti_3O_(12)/SiO_2上的吸附率不超过3%。负载后Bi_4Ti_3O_(12)的光催化活性均有提高,其中质量分数为50%负载量的Bi_4Ti_3O_(12)/SiO_2具有最高的活性。在Bi_4Ti_3O_(12)和质量分数为50%负载量的Bi_4Ti_3O_(12)/SiO_2上的光催化反应速率常数分别为0.021 s-1和0.027 s-1。Bi,Ti3OJSiO2 photocatalytic material coated quartz sand was prepared by sol-gel method. The effect of deposition process on physical property and photocatalytic activity of the deposited Bi4Ti3012 were studied. The deposited Bi4Ti3012 shows a layered perovskite structure on the surface of the amorphous quartz sand. Whlie the deposition process does not alter the electron binding energies of the deposited Bi4Ti3012. The adsorption of reactive brilliant red X-3B on pure Bi4Ti3012 and xBi4Ti3012/SiO2 with different deposited among X is not more than 3%. Photocatalytic activity of the deposited Bi,TiO,2 is en- hanced, among others the Bi4Ti302/SJO2 with 50 mass% Bi4Ti302 has the maximum activity. The rate con- stants of photocatalytic reactions for Bi,Ti^O,2 and 50%Bi,Ti3OJSiO2 are 0.021 s-1 and 0.027 s-1 respec- tively.

关 键 词：无机非金属材料 钛酸铋 活性艳红X-3B 光催化 石英砂 

分 类 号：TQ174[化学工程—陶瓷工业]