研究报告
周新晨,谭正德,湛日梦,区泽堂,王娇玉.SnO2/TS-1纳米材料及光催化降解工业染料研究[J].环境科学学报,2018,38(3):968-973
SnO2/TS-1纳米材料及光催化降解工业染料研究
- SnO2/TS-1 nanomaterials as photocatalyst for the degradation of industrial dyes
- 基金项目：湖南省教改项目
- 作者
- 单位
- 周新晨
- 湖南工程学院 化学化工学院, 湘潭 411104
- 谭正德
- 湖南工程学院 化学化工学院, 湘潭 411104
- 湛日梦
- 湖南工程学院 化学化工学院, 湘潭 411104
- 区泽堂
- 湖南工程学院 化学化工学院, 湘潭 411104
- 王娇玉
- 湖南工程学院 化学化工学院, 湘潭 411104
- 摘要：以SnCl4·5H2O为原料，钛硅分子筛TS-1为载体，采用超声溶胶-凝胶法制备了负载型催化剂SnO2/TS-1，并对该催化剂进行X射线衍射、扫描电镜、透射电镜、比表面积等表征.以罗丹明B作为模拟废水（20 mg·L-1），系统研究了催化剂SnO2/TS-1纳米材料制备条件与影响光降解性能的主要因素，并对印染企业的实际印染染料进行降解.结果表明：在pH=7.0~8.0下，经450℃焙烧制备了球形SnO2/TS-1（SnO2负载量为42%）纳米催化剂，比表面积为270 m2·g-1，平均孔径为46.81 nm；在高压汞灯（λmax=365 nm）光照60 min，催化剂用量为30 mg的条件下，催化剂对实际应用的工业染料罗丹明B、酸性蓝、活性黑、RGFL黄、酸性红A-2BF的降解率分别为96.44%、99.85%、99.78%、96.15%、94.65%，TOC与COD的下降率分别为89.3%~96.4%和81.6%~90.4%，且催化剂稳定性较好.
- Abstract：SnO2/TS-1 was prepared by ultrasonic sol-gel method using SnCl4·5H2O as raw material and titanium silicalite TS-1 as support. It was characterized by XRD, SEM, TEM, and BET techniques. The results show that SnO2/TS-1 nanomaterials (42% SnO2 loading) in the form of spherical nanoparticles with specific surface area of 270 m2·g-1 and average pore diameter of 46.81 nm could be obtained under the condition of solution pH=7.0~8.0 and calcination temperature 450℃. Then SnO2/TS-1 was evaluated as photocatalyst for the degradation of industrial dyes. It was observed that at a catalyst loading of 30 mg, the degradation of Rhodamine B, acid blue, active black, RGFL yellow and acid red A-2BF reached 96.44%, 99.85%, 99.78%, 96.15% and 94.65%, The decrease of TOC and COD were 89.3%~96.4% and 81.6%~90.4%, respectively, in 60 min under light irradiation originated from a high-pressure mercury lamp (λmax=365 nm). In the reusability experiments, the catalyst was found to be stable in performance.
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