掺杂型纳米氧化锌分散性及自由基与抗菌性能的研究

发布时间：2018-04-23 12:33

本文选题：纳米氧化锌 + 羟基自由基　；参考：《佳木斯大学》2017年硕士论文

【摘要】：目的纳米氧化锌是新一代光催化抗菌材料。但由于其自身存在一些缺陷而不能得到广泛应用。本研究通过单、双掺杂的方式及加入表面活性剂的方法对其进行改性,使其产生羟基自由基能力增强,光催化及抗菌能力都得到了提高。方法采用沉淀法制备出掺杂型纳米氧化锌。通过改变沉淀剂的浓度,优化实验条件制备出不同粒径的样品,并且对其用表面活性剂SDBS和PAAS分别进行分散处理。由纳米氧化锌的特殊电子结构可知,其抗菌活性主要源于其能产生羟基自由基。因此本文建立了紫外-分光光度法和荧光-分光光度法间接对分散处理后的掺杂型纳米氧化锌产生的羟基自由基含量进行检测。同时,对分散处理后的掺杂型纳米氧化锌进行光催化性能及抗菌性检测,比较掺杂方式不同和所用表面活性剂不同对其性能的影响。结果沉淀剂浓度适当减小会得到粒径更小的样品。双掺杂的纳米氧化锌会产生更多羟基自由基,光催化及抗菌性更强;经PAAS分散处理的纳米氧化锌会产生更多羟基自由基,光催化及抗菌能力更强。结论双掺杂型纳米氧化锌光催化性能及抗菌性更强。经过PAAS的分散处理后,其优异性能更会得到良好的发挥,对其在各方面的应用都提供了广阔的前景。分光光度法检测体系自由基的方法灵敏度高、操作简便,对自由基在临床及实验室检测中提供了新的思路。
[Abstract]:Objective Nano-zinc oxide is a new generation of photocatalytic antibacterial materials. However, it can not be widely used because of its own defects. In this study, the ability of producing hydroxyl radical and the ability of photocatalysis and antimicrobial activity were improved by single, double doping and adding surfactants. Methods the doped nanometer zinc oxide was prepared by precipitation method. By changing the concentration of precipitator and optimizing the experimental conditions, samples with different particle sizes were prepared and treated separately with surfactant SDBS and PAAS. According to the special electronic structure of nanometer zinc oxide, its antibacterial activity is mainly due to the production of hydroxyl radical. In this paper, UV-spectrophotometry and fluorescence spectrophotometry were established to detect the hydroxyl radical content of doped nano-zinc oxide after dispersion treatment. At the same time, the photocatalytic properties and antimicrobial properties of doped nano-ZnO after dispersion treatment were tested, and the effects of different doping methods and surfactants on its performance were compared. Results the sample with smaller particle size can be obtained by decreasing the concentration of precipitator. The double doped nano-ZnO can produce more hydroxyl radicals and have stronger photocatalytic and antibacterial properties, and the nano-ZnO treated by PAAS dispersion will produce more hydroxyl radicals and stronger photocatalytic and antibacterial activity. Conclusion double doped nanometer zinc oxide has better photocatalytic and antibacterial properties. After the dispersion of PAAS, its excellent performance will be played well, which provides a broad prospect for its application in various fields. The method of spectrophotometry for the detection of free radicals in the system is highly sensitive and easy to operate, which provides a new idea for the detection of free radicals in clinic and laboratory.
【学位授予单位】：佳木斯大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：R318.08

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