本文選題：三元金屬氧化物 + Bi_2MoO_6　； 參考：《大連海事大學(xué)》2017年碩士論文

【摘要】：三元金屬氧化物是一類重要的功能材料,因其具有獨(dú)特的空間構(gòu)型和潛在的理化性能在傳感器方面受到諸多科研工作者的關(guān)注。為了研究三元金屬氧化物納米材料的氣敏性能,本文合成了鉬酸鉍(Bi_2MoO_6)納米團(tuán)簇與鎢酸鉍(Bi_2WO_6)納米花簇,并對(duì)所合成的粉體進(jìn)行表征和氣敏性能研究。主要的研究工作如下:采用水熱法合成了 Bi_2MoO_6納米團(tuán)簇,通過(guò)改變加熱溫度合成不同類型的Bi_2MoO_6納米粉體,并對(duì)材料進(jìn)行掃描電鏡(SEM)、X射線衍射圖譜(XRD)、X射線光電子能譜(XPS)、粒度和氮吸附分析。實(shí)驗(yàn)結(jié)果表明反應(yīng)溫度對(duì)材料的形貌和氣敏性能起到重要影響,合成條件在160℃下恒溫加熱24h制備的材料更具有氣敏性能。器件的最佳工作電壓為240℃,對(duì)100mg/L乙醇?xì)怏w的靈敏度為2.71,采用水熱法合成了 Bi_2WO_6納米花簇,通過(guò)改變?nèi)軇┖秃铣蓷l件制備不同類型的了Bi_2WO_6納米粉體,并利用掃描電鏡(SEM)以及X射線衍射圖譜(XRD)、投射電子顯微鏡(TEM)對(duì)顆粒形貌,晶體結(jié)構(gòu)和尺寸進(jìn)行表征分析。實(shí)驗(yàn)結(jié)果表明反應(yīng)溫度、加熱時(shí)間、溶劑類型對(duì)材料的形貌和氣敏性能起到重要影響,合成條件在170℃下恒溫加熱24h制備的材料氣敏性能更好。器件的最佳工作溫度為300℃,有良好的響應(yīng)-恢復(fù)性能,對(duì)乙醇?xì)怏w表現(xiàn)出良好的選擇性,Bi_2W06-W對(duì)100mg/L乙醇?xì)怏w的靈敏度為7.96;Bi_2W06-A對(duì)100mg/L乙醇?xì)怏w的靈敏度為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，

本文編號(hào)：1749929