發(fā)布時間：2018-04-23 12:33

  本文選題：納米氧化鋅 + 羥基自由基�。� 參考：《佳木斯大學》2017年碩士論文

【摘要】：目的納米氧化鋅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廣泛應用。本研究通過單、雙摻雜的方式及加入表面活性劑的方法對其進行改性,使其產(chǎn)生羥基自由基能力增強,光催化及抗菌能力都得到了提高。方法采用沉淀法制備出摻雜型納米氧化鋅。通過改變沉淀劑的濃度,優(yōu)化實驗條件制備出不同粒徑的樣品,并且對其用表面活性劑SDBS和PAAS分別進行分散處理。由納米氧化鋅的特殊電子結(jié)構(gòu)可知,其抗菌活性主要源于其能產(chǎn)生羥基自由基。因此本文建立了紫外-分光光度法和熒光-分光光度法間接對分散處理后的摻雜型納米氧化鋅產(chǎn)生的羥基自由基含量進行檢測。同時,對分散處理后的摻雜型納米氧化鋅進行光催化性能及抗菌性檢測,比較摻雜方式不同和所用表面活性劑不同對其性能的影響。結(jié)果沉淀劑濃度適當減小會得到粒徑更小的樣品。雙摻雜的納米氧化鋅會產(chǎn)生更多羥基自由基,光催化及抗菌性更強;經(jīng)PAAS分散處理的納米氧化鋅會產(chǎn)生更多羥基自由基,光催化及抗菌能力更強。結(jié)論雙摻雜型納米氧化鋅光催化性能及抗菌性更強。經(jīng)過PAAS的分散處理后,其優(yōu)異性能更會得到良好的發(fā)揮,對其在各方面的應用都提供了廣闊的前景。分光光度法檢測體系自由基的方法靈敏度高、操作簡便,對自由基在臨床及實驗室檢測中提供了新的思路。
[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.
【學位授予單位】：佳木斯大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：R318.08

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本文編號：1791993