Synthesis of Ag-TiO2/CNTs nanopartical composites and their photocatalytic activity and antiseptic property

doi:10.16085/j.issn.1000-6613.2015.07.013

Abstract

Abstract: Ag-TiO₂/CNTs nanopartical composites were synthesized by sol-gel method, and then obtained samples were thermally treated at 450℃. The crystal morphology and the micro-surface structures were characterized by XRD, SEM and low temperature N₂adsorption-desorption. Absorbency of composites was analyzed by UV-vis diffuse reflection spectra. Under artificial UV-light irradiation, the degradation of methylorange was used to evaluate the photo-catalytic activity of Ag-TiO₂/CNTs nanopartical composites. E.coli and bacillus subtilis were used to characterize antiseptic property by bacteriostatic circle method. The result showed that the photocatalytic activity of Ag-TiO₂/CNTs nanopartical composites was higher than that of pure TiO₂, and Ag-TiO₂/CNTs nanoparticles with 1% (mass fraction) CNTs showed the best photocatalytic activity. The degradation rate is 76.5% exposuring to ultraviolet light about 150min. Ag-TiO₂/CNTs nanopartical had much better antiseptic property than TiO₂nanopartical, Ag nanoparticles, CNTs (purified), and Ag-TiO₂/CNTs nanopartical with10% (mass fraction) CNTs showed the best antiseptic property among samples. The largest diameter of inhibition zone is 25.8mm.

Key words: titanium dioxide, loading silver, catalysis, composites, nanomaterials

摘要： 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CNTs 10%(质量分数)的样品的杀菌效果最好, 抑菌圈直径达到25.8mm。

关键词: 二氧化钛, 载银, 催化, 复合材料, 纳米材料

CLC Number:

O643.3

LI Junjian, LI Qiaoling. Synthesis of Ag-TiO₂/CNTs nanopartical composites and their photocatalytic activity and antiseptic property[J]. Chemical Industry and Engineering Progree, 2015, 34(07): 1887-1893,1955.

李君建, 李巧玲. 载银TiO₂/碳纳米管复合材料的制备及其催化杀菌性能[J]. 化工进展, 2015, 34(07): 1887-1893,1955.

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Synthesis of Ag-TiO₂/CNTs nanopartical composites and their photocatalytic activity and antiseptic property

载银TiO₂/碳纳米管复合材料的制备及其催化杀菌性能

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