光化学及光催化氧化法处理高浓度废水_毕业论文.doc

光化学及光催化氧化法处理高浓度废水
摘要
光催化氧化技术具有高效、节能、清洁无毒等突出优点,是一项具有广泛应用前景的新型水污染处理技术,越来越受到人们的重视。
本文以***镍、硫酸钛、氢氧化钠、碳酸钠为原料,采用煅烧水滑石法制备了Ni掺杂TiO2 的粒子,并利用XRD的测试手段对制备的掺杂Ni的TiO2 纳米粒子进行表征;以金橙Ⅱ为光催化反应模型,研究了煅烧温度、镍掺杂量、底物浓度等对TiO2光学性能及光催化活性的影响。结果表明: 样品的催化活性随焙烧温度的提高而降低。样品经500 ℃煅烧,随Ni掺杂量增加,光催化性降低;样品的催化降解的效率随底物浓度的增加先升高当达到一个峰值时,然后降低,在10mg/L时达到最佳值;样品在镍钛比2:1、煅烧温度500℃的情况下降解效率最佳。
关键词:二氧化钛;光催化降解;镍;金橙Ⅱ
ABSTRACT
Photocatalytic oxidation technology has many prominent characteristics, such as high efficiency, energy saving, clean and non-toxic and so on. It is a new water treatment technology which has wide application prospect and attracts more and more people's attention.
In this paper, I make particles that Ni doped TiO2 by using nickel nitrate, sulfate, sodium hydroxide, sodium carbonate as the raw materials and using calcining hydrotalcite method. I characterize preparation of TiO2 nanoparticles doped Ni by means of XRD test. I study the influences of the calcination temperature, Ni-doping, the substrate concentration on the optical properties by using Gold orange Ⅱ as the photocatalytic reaction model. The results showed that: the catalytic activity of samples decreaseds with the calcination temperature increases. After being calcined at 500℃, samples' photocatalytic reduces with the increase of Ni doping, photo catalytic reduction; The efficiency of photocatalytic degradation of samples reaches to a peak and then decreases with the substrate concentration increasing(it reaches the best value in the 10mg/L).Sample's solution efficiency is the best when Ni/Ti 2:1, calcined in 500℃.
Key words:titanium dioxide;photocatalytic degradation;nickel;golden orange Ⅱ
目录
摘要 I
ABSTRACT II
1 前言 1
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国内外研究现状、水平 4
存在的问题 5
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2 实验部分 7
主要实验试剂及仪器 7
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3实验结果与讨论 9
Ⅱ的介绍 9
Ⅱ的性质、结构图 9
Ⅱ的工作曲线绘制 9
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