高活性纳米氧化锌的制备表征及光催化分解水制氢研究
关键词 纳米 氧化锌 两相法 光催化
毕业设计说明书（论文）外文摘要
Title The preparation and the characterization of nano-ZnO with high activity and the research of producing H2 by splitting water with photocatlysis
Abstract
As an important semi-conductor, ZnO nano-materials have a quite wide application prospects as catalyst of splitting water, co-catalyst, catalyst of degrading organic pollution, gas-sensor and so on. In this paper, we discussed how to prepare ZnO nanosheets by liquid-liquid two-phase method using Zinc acetate dihydrate as the precursor, toluene as the organic phase, (n-Dodecyl)trimethylammonium bromide (DTAB) as the phase-transfer agent, mainly focused on the effects of four organic bases-- monoethanolamine, diethanolamine, triethylolamine and triethylamine and the present of polyethylene glycol (with average molecular weight 400) as well as the temperature of drying to the ability of photocatalytic reaction. Power X-Ray diffraction, scanning electron microscope, transmission electron microscope were used to characterize the samples. UV-vis spectra were used to detect the degradation of methyl blue. Our experiments showed the sample prepared by monoethanolamine had the best ability of photocatalysis when all of samples were prepared without PEG-400 and dried under 60℃.However, when the samples were prepared with PEG-400 the sample prepared by triethylamine became the best one in photocatalysis and when dried under 100℃ its ability of photocatalysis improved again enabling it degraded methyl blue within 1 hour. Moreover, we also discussed the ability of photocatalysis of nano-ZnO loading with Ag particles finding the present of Ag particles can improve the ability of photocatalysis of ZnO.
Keywords nanometer ZnO two-phases method photocatalysis
目 录
1 引言 1
1.1 制备纳米ZnO的各种方法 1
1.2 用于光催化的纳米ZnO的研究情况 1
1.3 提高纳米ZnO光催化活性的研究情况 3
1.4 本文特色、研究内容及研究方案 5
2 片状结构ZnO的制备及表征 7
2.1 片状结构ZnO的制备 7
2.2 表征与测试 9
2.3 结果与讨论 10
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