钼系光催化抗菌材料的制备及性能研究  

Preparation and Properties of Molybdenum Photocatalytic Antibacterial Materials

作　　者：夏振昊 唐晓宁[1] 张彬[1] 李阳[1] 姚希燕 Xia Zhenhao;Tang Xiaoning;Zhang Bin;Li Yang;Yao Xiyan(Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学,云南昆明650500

出　　处：《稀有金属材料与工程》2021年第5期1817-1825,共9页Rare Metal Materials and Engineering

基　　金：国家重点研发计划重点专项(2017YFC0210303);昆明理工大学分析测试基金(2019M20182208050)。

摘　　要：以水玻璃和碳酸氢钠作为硅胶原料,采用溶胶-凝胶法将钼离子负载到硅胶表面以制备钼系抗菌硅胶,通过单因素实验得到了其最佳制备条件。利用XRD、ICP、SEM、EDS、XPS、BET等对材料的晶体结构、离子浓度、表观形貌、负载形式、比表面积等进行了表征。另外,通过平板涂布法对样品的抗菌性能进行了检测;观察不同光源下亚甲基蓝溶液的降解情况,检测了复合材料的光催化效果。结果表明:在未改变硅胶结构形态的基础上成功制备钼系光催化抗菌材料,且在最佳制备条件下对大肠杆菌的杀菌效果可达99%以上;在紫外光持续照射240 min后可以将98%的染料降解,可见光在持续照射360 min后降解率为93.5%。最后,结合表征和检测结果探讨了光催化抗菌机理,证明该材料主要杀菌方式为活性氧杀菌。With sodium bicarbonate and sodium silicate as silica materials,molybdenum ions were loaded onto silica gel surface by sol-gel method to prepare antibacterial molybdenum silica gel.The best preparation conditions were obtained by single factor experiment.XRD,ICP,SEM,EDS,XPS and BET were used to characterize the crystal structure,ion concentration,apparent morphology,loading form and specific surface area of the material.In addition,the antibacterial properties of the samples were tested by plate coating method.The photocatalytic effect of the composite was investigated by observing the degradation of methylene blue solution under different light sources.The results show that molybdenum photocatalytic antibacterial material is successfully prepared without changing the structure and morphology of silica gel,and the bactericidal effect on Escherichia coli under the best preparation condition is over 99%;98%of the dyes can be degraded after240 min of continuous irradiation with ultraviolet light,while 93.5%after 360 min of continuous irradiation with visible light.Finally,the antibacterial mechanism of photocatalysis was discussed based on the results of characterization and detection,which proves that the main sterilization method of the material is reactive oxygen species sterilization.

关 键 词：抗菌硅胶 钼 光催化抗菌机理 

分 类 号：TB34[一般工业技术—材料科学与工程]