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化工进展  2015 

载银TiO2/碳纳米管复合材料的制备及其催化杀菌性能

DOI: 10.16085/j.issn.1000-6613.2015.07.013

Keywords: 二氧化钛,载银,催化,复合材料,纳米材料

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Abstract:

采用溶胶-凝胶法,在450℃下煅烧制备载银TiO2/碳纳米管纳米复合材料;采用XRD、SEM以及N2吸脱附对样品的晶体结构及样品微观形貌进行表征;通过UV-vis漫反射光谱表征了复合材料对紫外可见光的吸收性能;以甲基橙为模型污染物,评价了样品紫外光光催化降解甲基橙的活性,以大肠杆菌和枯草芽孢杆菌为菌种,采用抑菌圈法表征样品的杀菌性能。结果表明,载银TiO2/碳纳米管纳米复合材料比纯TiO2纳米颗粒有更好的紫外光光催化活性,其中掺碳纳米管(CNTs)1%(质量分数)的效果最好,紫外光照射150min,降解率达到76.5%;载银TiO2/碳纳米管纳米复合材料比TiO2纳米颗粒、Ag纳米粒子、CNTs(纯化处理后)的杀菌效果都要好很多,其中掺CNTs10%(质量分数)的样品的杀菌效果最好,抑菌圈直径达到25.8mm。

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