本文選題：丙酮　切入點(diǎn)：半導(dǎo)體氧化物　出處：《吉林大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著工業(yè)發(fā)展,生產(chǎn)生活中有害氣體的排放對人們的生活影響越來越大,因而對于這些氣體的檢測和控制廣受關(guān)注。因此,各式各樣的氣體傳感器倍受期待,其中對氣體傳感器性能影響比較大的因素是傳感材料。三維反蛋白石結(jié)構(gòu)(3DIO)由于有序多孔的特點(diǎn),近年來廣受國內(nèi)外研究者的青睞,成為了材料領(lǐng)域中的熱點(diǎn)研究方向之一。3DIO材料的孔隙率理論上可以達(dá)到74%,為氣敏傳感提供了足夠多的活性位點(diǎn),并且三維有序的結(jié)構(gòu)有助于電子的傳輸。基于以上幾點(diǎn),我們通過模板法制備3DIO ZnO-Fe_3O_4復(fù)合材料,并且對不同比例Fe的樣品系統(tǒng)探究了其氣敏性能的變化。本論文主要工作內(nèi)容和結(jié)論如下:(1)制備了Fe/Zn的原子比分別為0、10%、20%和30%的3DIO ZnO-Fe_3O_4復(fù)合材料,并對材料的表面形貌,物相組成進(jìn)行了詳細(xì)的表征與分析。(2)系統(tǒng)研究了不同F(xiàn)e摻雜比例樣品的丙酮?dú)饷粜阅?測試結(jié)果表明,20%Fe/Zn原子比摻雜的樣品比其他樣品展現(xiàn)出更優(yōu)異的氣敏性能。最優(yōu)的元件對丙酮的檢測下限可以達(dá)到100ppb。(3)對ZnO-Fe_3O_4復(fù)合材料的傳感機(jī)制進(jìn)行了一些分析。通過幾組對比實(shí)驗(yàn),在電子傳輸與微觀結(jié)構(gòu)的角度初步說明了實(shí)驗(yàn)所得最優(yōu)器件傳感性能提高的機(jī)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.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP212

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