三元金属氧化物纳米材料的制备及气敏性能研究

发布时间：2018-04-14 15:30

  本文选题：三元金属氧化物 + Bi_2MoO_6　； 参考：《大连海事大学》2017年硕士论文

【摘要】：三元金属氧化物是一类重要的功能材料,因其具有独特的空间构型和潜在的理化性能在传感器方面受到诸多科研工作者的关注。为了研究三元金属氧化物纳米材料的气敏性能,本文合成了钼酸铋(Bi_2MoO_6)纳米团簇与钨酸铋(Bi_2WO_6)纳米花簇,并对所合成的粉体进行表征和气敏性能研究。主要的研究工作如下:采用水热法合成了 Bi_2MoO_6纳米团簇,通过改变加热温度合成不同类型的Bi_2MoO_6纳米粉体,并对材料进行扫描电镜(SEM)、X射线衍射图谱(XRD)、X射线光电子能谱(XPS)、粒度和氮吸附分析。实验结果表明反应温度对材料的形貌和气敏性能起到重要影响,合成条件在160℃下恒温加热24h制备的材料更具有气敏性能。器件的最佳工作电压为240℃,对100mg/L乙醇气体的灵敏度为2.71,采用水热法合成了 Bi_2WO_6纳米花簇,通过改变溶剂和合成条件制备不同类型的了Bi_2WO_6纳米粉体,并利用扫描电镜(SEM)以及X射线衍射图谱(XRD)、投射电子显微镜(TEM)对颗粒形貌,晶体结构和尺寸进行表征分析。实验结果表明反应温度、加热时间、溶剂类型对材料的形貌和气敏性能起到重要影响,合成条件在170℃下恒温加热24h制备的材料气敏性能更好。器件的最佳工作温度为300℃,有良好的响应-恢复性能,对乙醇气体表现出良好的选择性,Bi_2W06-W对100mg/L乙醇气体的灵敏度为7.96;Bi_2W06-A对100mg/L乙醇气体的灵敏度为6.45。
[Abstract]:Ternary metal oxides are a kind of important functional materials. Because of their unique spatial configuration and potential physical and chemical properties, ternary metal oxides have attracted many researchers' attention in sensor field.In order to study the gas sensing properties of ternary metal oxide nanomaterials, Bi2MoO6) nanoclusters and Bi2WO6) nanoclusters were synthesized and characterized and their gas sensing properties were studied.The main research work is as follows: Bi_2MoO_6 nanoclusters were synthesized by hydrothermal method, and different types of Bi_2MoO_6 nanocrystals were synthesized by changing the heating temperature.The X-ray diffraction patterns of the materials were analyzed by scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), particle size and nitrogen adsorption.The experimental results show that the reaction temperature has an important effect on the morphology and gas sensing properties of the materials, and the materials prepared under constant temperature of 160 鈩，

本文编号：1749929