三维大孔反蛋白石结构半导体金属氧化物的气敏性能的研究

发布时间：2018-03-21 15:28

本文选题：丙酮　切入点：半导体氧化物　出处：《吉林大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着工业发展,生产生活中有害气体的排放对人们的生活影响越来越大,因而对于这些气体的检测和控制广受关注。因此,各式各样的气体传感器倍受期待,其中对气体传感器性能影响比较大的因素是传感材料。三维反蛋白石结构(3DIO)由于有序多孔的特点,近年来广受国内外研究者的青睐,成为了材料领域中的热点研究方向之一。3DIO材料的孔隙率理论上可以达到74%,为气敏传感提供了足够多的活性位点,并且三维有序的结构有助于电子的传输。基于以上几点,我们通过模板法制备3DIO ZnO-Fe_3O_4复合材料,并且对不同比例Fe的样品系统探究了其气敏性能的变化。本论文主要工作内容和结论如下:(1)制备了Fe/Zn的原子比分别为0、10%、20%和30%的3DIO ZnO-Fe_3O_4复合材料,并对材料的表面形貌,物相组成进行了详细的表征与分析。(2)系统研究了不同Fe掺杂比例样品的丙酮气敏性能,测试结果表明,20%Fe/Zn原子比掺杂的样品比其他样品展现出更优异的气敏性能。最优的元件对丙酮的检测下限可以达到100ppb。(3)对ZnO-Fe_3O_4复合材料的传感机制进行了一些分析。通过几组对比实验,在电子传输与微观结构的角度初步说明了实验所得最优器件传感性能提高的机理。
[Abstract]:With the development of industry, the emission of harmful gases in production and life has become more and more important to people's lives, and the detection and control of these gases have attracted much attention. Among them, the most important factor affecting the performance of gas sensors is the sensing material. Due to the characteristic of ordered and porous structure, 3D inverse opal structure (3DIO) has been favored by researchers at home and abroad in recent years. It has become one of the hot research directions in the field of materials. The porosity of 3DIO materials can reach 74 percent theoretically, which provides enough active sites for gas sensing, and the three-dimensional ordered structure is helpful for electron transport. We prepared 3DIO ZnO-Fe_3O_4 composites by template method. The main contents and conclusions of this thesis are as follows: (1) the atomic ratio of Fe/Zn is 0.10% and 30%% respectively, and the 3DIO ZnO-Fe_3O_4 composites are prepared, and the surface morphology of the composites is also studied. The phase composition was characterized and analyzed in detail. The results show that the samples doped with 20% Zn atoms show better gas sensitivity than other samples. The optimum detection limit for acetone is 100 ppb. 3) the sensing mechanism of ZnO-Fe_3O_4 composites is analyzed. Through several groups of comparative experiments, From the angle of electron transmission and microstructure, the mechanism of improving the sensing performance of the optimal device obtained by experiment is preliminarily explained.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212

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