ZnO基纳米空心球的制备及性质研究

发布时间：2018-04-19 16:29

本文选题：纳米空心球 + Znl-xMgxO　；参考：《浙江大学》2015年硕士论文

【摘要】：本论文首次采用胶体碳球模板法制备了多种金属元素掺入ZnO纳米空心球,并且对其相关性质进行了系统的研究。此外,还制备了Zn0基复合材料纳米空心球,并且对其光催化性能进行了深入研究。本论文的主要研究内容如下：1.采用胶体碳球模板法制备了晶体质量良好的Zn1-xMgxO纳米空心球,实现了Mg掺入浓度的可控调节,其中Mg的掺入浓度最高达48%而不出现第二相。研究了在不同温度下退火处理对其晶体结构和光学性质的影响,发现退火温度对Mg在ZnO中的固溶度有直接影响,该固溶度随着退火温度的升高而减小。2.在胶体碳球模板法制备Zn1-xMgxO纳米空心球的基础上进行推广,采用此种方法制备了Na、Al、NaMg掺入ZnO纳米空心球,确定了各种金属元素的掺入,并且对其潜在的应用进行了探索,发现此种金属掺入ZnO纳米空心球有望用于ZnO薄膜生长用靶材的制备。3.采用胶体碳球模板法制备了NiO/ZnO复合材料纳米空心球,研究了组分比例和晶粒大小对其光催化性能的影响。以p-NiO/n-ZnO纳米异质结为基础,探讨了NiO/ZnO复合材料的光催化机理,发现纳米量级的异质结可以有效的实现光生电子-空穴对的分离,从而显著的提高光催化效率。
[Abstract]:In this paper, ZnO nanocrystalline hollow spheres were prepared by colloidal carbon sphere template for the first time, and their related properties were systematically studied.In addition, Zn0 composite nanospheres were prepared and their photocatalytic properties were studied.The main contents of this thesis are as follows: 1.Zn1-xMgxO nanospheres with good crystal quality were prepared by colloidal carbon sphere template method, and the mg incorporation concentration was controlled, in which the mg doping concentration was up to 48% and no second phase appeared.The effects of annealing temperature on the crystal structure and optical properties of mg in ZnO were studied. It was found that the annealing temperature had a direct effect on the solubility of mg in ZnO, and the solution decreased with the increase of annealing temperature.Based on the preparation of Zn1-xMgxO nanospheres by colloidal carbon sphere template method, Zn1-xMgxO nanospheres were prepared by using this method. The incorporation of various metal elements was determined, and its potential application was explored.It was found that the metal doped with ZnO nanospheres could be used in the preparation of ZnO thin film growth target. 3.NiO/ZnO nanocomposite hollow spheres were prepared by colloidal carbon sphere template method. The effects of composition ratio and grain size on their photocatalytic properties were studied.The photocatalytic mechanism of NiO/ZnO composite was discussed on the basis of p-NiO/n-ZnO nanocrystalline heterostructure. It was found that nano-heterojunction could effectively separate photogenerated electron-hole pairs and thus significantly improve photocatalytic efficiency.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：O614.241;TB383.1

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