科学研究

介孔SiO2载TiO2光催化抗菌性能研究

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  • 江苏理工学院化学与环境工程学院,常州213001
成程(1994-),女,硕士,主要研究方向为新型抗污染膜材料制备及应用。

收稿日期: 2019-07-09

  修回日期: 2020-05-28

  网络出版日期: 2020-10-23

基金资助

国家自然科学基金青年基金(51508239);江苏省自然科学基金青年基金项目(BK20150245);江苏省研究生科研与实践创新计划项目(SJCX18-0978);江苏省研究生教育教学改革课题(JGLX18-165和JGLX18-166)

Study on photocatalytic antibacterial property of m-SiO2-TiO2

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  • Department of Chemical and Environmental Engineering,Jiangsu University of Technology,Changzhou 213001

Received date: 2019-07-09

  Revised date: 2020-05-28

  Online published: 2020-10-23

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。

本文引用格式

成程, 施程友, 张曼莹 . 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

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.

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