化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (8) : 208-212. DOI: 10.19817/j.cnki.issn 1006-3536.2020.08.046

科学研究

介孔SiO₂载TiO₂光催化抗菌性能研究

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Study on photocatalytic antibacterial property of m-SiO₂-TiO₂

Cheng Cheng, Shi Chengyou, Zhang Manying

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Received
2019-07-09
Issue Date	Revised Date
2020-10-23	2019-07-09

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摘要

运用模板法制备介孔二氧化硅(m-SiO₂),借助溶胶-凝胶法制备介孔二氧化硅载TiO₂(m-SiO₂-TiO₂)纳米复合材料。通过透射电镜(TEM)和X射线衍射(XRD)等手段对复合材料的形貌和组成进行表征。以亚甲基蓝(MB)和罗丹明B(RhB)的脱色降解实验来表征复合材料的光催化性能,通过CFU平板计数对其抗菌性能进行研究。结果表明:m-SiO₂纳米颗粒具有有序的介孔结构,二氧化钛(TiO₂)为锐钛矿相;在可见光照射下,RhB的光催化降解反应遵循一级反应动力学;复合材料的光催化降解活性由复合材料的吸附能力和TiO₂的光催化活性共同决定;复合材料对铜绿假单胞菌(PA)有更强的抗菌效果。

Abstract

Mesoporous silica(m-SiO₂) was prepared by template method,and mesoporous silica-supported titania (m-SiO₂-TiO₂) nanocomposites were prepared by sol-gel method.The morphology and composition of the composites were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD).The photocatalytic properties of different TiO₂ samples were characterized by decolorization degradation of methylene blue (MB) and rhodamine B (RhB).The antibacterial properties of the samples were characterized by CFU plate counting method.The results shown that m-SiO₂ nanoparticles had an ordered mesoporous structure.TiO₂ was supported on the surface of m-SiO₂ with anatase crystal form.The photocatalytic activities of m-SiO₂-TiO₂ were evaluated by the photocatalytic degradation of Rhodamine B.The degradation of Rhodamine B followed first-order reaction kinetics.The photocatalytic activities of the composites depended on their adsorption abilities and the activity of titania loaded into the m-SiO₂ molecular sieves.Nanocomposite material had stronger antibacterial effect on Pseudomonas aeruginosa.

关键词

介孔二氧化硅 / 二氧化钛 / 光催化 / 抗菌

Key words

m-SiO₂ / TiO₂ / photodegradation / antibacterial

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介孔SiO₂载TiO₂光催化抗菌性能研究[J]. 化工新型材料, 2020, 48(8): 208-212 DOI:10.19817/j.cnki.issn 1006-3536.2020.08.046

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