摘要
以SnCl_4·5H_2O为原料,改性海泡石为载体,采用超声溶胶-凝胶法制备出负载型3D-SnO_2/改性海泡石催化剂,采用X射线衍射、扫描电镜、比表面积仪对催化剂进行表征。以甲基橙作为模拟废水(20 mg/L),研究了3D-SnO_2/改性海泡石制备条件对其光降解性能的影响。结果表明:在溶液pH 7.0~8.0,焙烧温度480℃条件下制备的块状3D-SnO_2/改性海泡石催化剂(SnO_2负载量15%),比表面积86 m^2/g,平均孔径80.97 nm,催化剂用量30mg的条件下,催化剂对模拟废水的降解率在300 min达到98.5%,催化剂稳定性较好。
Catalyst SnO_2/sepiolite was prepared by ultrasonic sol-gel method using SnCl_4· 5 H_2 O as raw material and sepiolite as support. The catalyst was characterized by X-ray diffraction, scanning electron microscopy, and N_2 adsorption/desorption analysis. The influence of conditions for catalyst synthesis on photocatalytic dye degradation was investigated using aqueous methyl orange（20 mg/L） as dye model. The results show that SnO_2/sepiolite（15% SnO_2 loading） with specific surface area of 86 m^2/g and average pore diameter of 80.97 nm was obtained under the conditions of pH 7.0—8. 0 and calcination temperature 480℃. The degradation of methyl orange reached 98.5% in 300 min at a catalyst loading of 30 mg. The catalyst could be reused four times with little decline of catalytic performance.
出处
《实验室研究与探索》
CAS
北大核心
2017年第12期36-39,共4页
Research and Exploration In Laboratory
基金
湖南省教改项目(湘教通[2016]400)
关键词
改性海泡石
氧化锡
溶胶-凝胶法
染料降解
sepiolite
tin oxide（ SnO2）
ultrasonic sol-gel
methyl orange degradation
