本文選題：半導(dǎo)體氧化物 + 生物模板　； 參考：《大連理工大學(xué)》2015年碩士論文

【摘要】：氣體傳感器廣泛應(yīng)用在大氣污染氣體、有毒有害氣體、易燃易爆氣體的檢測上。在各種氣體檢測方法中,半導(dǎo)體氧化物氣體傳感器受到極大重視,作為核心部分,半導(dǎo)體氧化物的成分、形貌結(jié)構(gòu)等對(duì)氣敏性能提升有直接相關(guān)性,多孔分級(jí)結(jié)構(gòu)是氣敏材料的理想結(jié)構(gòu)。然而由于合成工藝和技術(shù)的限制,構(gòu)筑多孔分級(jí)結(jié)構(gòu)存在較多問題,如結(jié)構(gòu)簡單、類型單一、缺乏一致性和有序性等。生物模板法以大自然中紛繁多樣的物種為模板,利用表面特定化學(xué)官能團(tuán)在合成過程中的誘導(dǎo)或限制,完好復(fù)制模板形貌、微觀結(jié)構(gòu),獲得高度分級(jí)多孔、一致性、有序性的新材料。本論文采用生物模板法制備氧化物敏感材料,并研究其氣敏性能。論文包括如下工作：以脫脂棉為模板,結(jié)合溶劑熱、超聲、浸漬等多種制備工藝,制備纖維狀Sn02材料。表征其形貌結(jié)構(gòu),同時(shí)測試了不同方法制備的Sn02材料的氣敏性,以浸漬法制備的材料對(duì)乙醇有較高的敏感性。在脫脂棉模板浸漬法的基礎(chǔ)上合成出不同濃度Ce02復(fù)合Sn02基材料,利用對(duì)其進(jìn)行TG/DSC、XRD、SEM、EDS、TEM、BET、FTIR表征,氣敏性測試表明摻入Ce提高了材料的丙酮敏感性,分析復(fù)合材料敏感機(jī)理。以油菜花粉為模板制備表面三維多孔骨架網(wǎng)狀Sn02以及A1摻雜材料,對(duì)其微觀結(jié)構(gòu)、成分進(jìn)行表征,測試材料的乙醇敏感性,實(shí)驗(yàn)結(jié)果表明摻雜A1提高了材料的乙醇敏感性、選擇性同時(shí)降低了工作溫度。以柚子皮為模板制備褶皺片層膜狀Sn02材料,并表征其形貌、微觀結(jié)構(gòu)、電子態(tài)等,研究模板化合成機(jī)理,測試材料對(duì)甲醛的氣敏性,結(jié)果表明材料對(duì)甲醛氣體具有低的工作溫度和高的響應(yīng)值、選擇性、穩(wěn)定性,同時(shí)濕度對(duì)其敏感性有影響。對(duì)柚子皮模板Sn02材料進(jìn)行不同濃度貴金屬Pd摻雜,對(duì)其微觀結(jié)構(gòu)、電子態(tài)等進(jìn)行表征,甲醛氣體氣敏測試結(jié)果顯示摻雜降低材料的工作溫度,對(duì)摻雜后敏感機(jī)理進(jìn)行研究。以柚子皮為模板制備W03材料,對(duì)模板化合成機(jī)理進(jìn)行探究,表征其微觀特性,測試其氣敏性,結(jié)果表明材料對(duì)甲苯氣體具有高的響應(yīng)值、選擇性。從XRD、SEM、EDS、BET、平均粒徑、孔徑分布、孔隙率等角度對(duì)上述三種模板制備Sn02材料進(jìn)行對(duì)比分析,初步闡述了生物模板法制備材料的模板化合成過程。同時(shí)對(duì)比不同模板制備Sn02材料的氣敏特性,包括敏感氣體、響應(yīng)值、最佳工作溫度、選擇性、長期穩(wěn)定性等,并從表面結(jié)構(gòu)、粒徑、孔道、比表面積等方面對(duì)Sn02材料氣敏性的差異給出初步解釋。
[Abstract]:Gas sensors are widely used in the detection of air pollution gases, toxic and harmful gases and flammable and explosive gases. Semiconductor oxide gas sensors have received great attention in various gas detection methods. As a core part, the composition, morphology and structure of semiconductor oxides are directly related to the enhancement of gas sensing performance. Porous graded structure is the ideal structure of gas sensing materials. However, due to the limitation of synthesis process and technology, there are many problems in constructing porous hierarchical structure, such as simple structure, single type, lack of consistency and order, etc. The biological template method takes the diverse species of nature as the template, using the inducement or restriction of specific chemical functional groups on the surface during the synthesis process, perfectly replicating the morphology and microstructure of the template, and obtaining highly hierarchical porous and consistent. A new material of order. In this paper, oxide sensitive materials were prepared by biological template method and their gas sensing properties were studied. The main work of this paper is as follows: the fiber Sn02 material is prepared by using degreased cotton as template, combined with solvothermal, ultrasonic, impregnation and other preparation processes. The morphology and structure of Sn02 were characterized and the gas sensitivity of Sn02 materials prepared by different methods was tested. The materials prepared by impregnation were highly sensitive to ethanol. Based on the template impregnation method, Ce02 composite Sn02 based materials with different concentrations were synthesized and characterized by TG- / DSC-XRDX / EDRDX (EDR) Tem Tem IR. The results of gas sensitivity test showed that the addition of ce increased the acetone sensitivity of the composites, and analyzed the sensitive mechanism of the composites. Three dimensional porous skeleton reticular Sn02 and A1 doped materials were prepared by using rape pollen as template. The microstructure and composition of the materials were characterized. The ethanol sensitivity of the materials was tested. The experimental results showed that Al doping increased the ethanol sensitivity of the materials. The selectivity decreases the working temperature at the same time. The lamellar Sn02 material was prepared by using pomelo peel as template, and its morphology, microstructure and electronic state were characterized. The mechanism of templating synthesis was studied and the gas sensitivity of the material to formaldehyde was tested. The results show that the material has low working temperature, high response value, selectivity, stability and humidity on the sensitivity of formaldehyde gas. Grapefruit template Sn02 was doped with noble metal PD with different concentrations, and its microstructure and electronic state were characterized. The results of formaldehyde gas sensing test showed that the doping reduced the working temperature of the material, and the mechanism of the doping was studied. W03 was prepared by using pomelo peel as template. The mechanism of template synthesis was investigated, its microscopic properties were characterized and its gas sensitivity was tested. The results showed that the material had high response value and selectivity to toluene gas. From the point of view of XRD-SEMS-BET, average particle size, pore size distribution, porosity and so on, the preparation of Sn02 materials by the above three templates was compared and analyzed, and the process of template synthesis of the materials prepared by biological template method was preliminarily described. At the same time, the gas-sensing properties of Sn02 materials prepared by different templates were compared, including sensitive gas, response value, optimum working temperature, selectivity, long-term stability, and surface structure, particle size, pore channel, etc. The differences in gas sensitivity of Sn02 materials are explained in terms of specific surface area.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ134.32;TP212

【共引文獻(xiàn)】

相關(guān)期刊論文 前8條

1 張陽;何秀麗;高曉光;李建平;;電紡SnO_2納米纖維的制備及其氣敏特性[J];微納電子技術(shù);2007年Z1期

2 秦臻;李子炯;王海燕;;定向SnO_2納米管的陣列制備及其場發(fā)射性能[J];微納電子技術(shù);2009年06期

3 王冰;徐平;楊國偉;;SnO_2納米線的低溫生長及光致發(fā)光研究(英文)[J];半導(dǎo)體學(xué)報(bào);2008年08期

4 黃在銀;柴春芳;;直接氧化法制備準(zhǔn)一維氧化物納米材料的研究進(jìn)展[J];材料導(dǎo)報(bào);2006年03期

5 ;Controlled Growth of One-Dimensional Oxide Nanomaterials[J];Journal of Materials Science & Technology;2006年01期

6 倪自豐;;SnO_2納米線的制備及其光致發(fā)光特性[J];機(jī)械工程材料;2011年10期

7 段勝聰;李雪;李悅;陳春霞;;淀粉模板法制備復(fù)合金屬氧化物及其催化α-蒎烯氧化性能的研究[J];分子催化;2015年04期

8 王冰;;SnO_2/Sn納米電纜的制備和表征[J];科技導(dǎo)報(bào);2008年11期

相關(guān)會(huì)議論文 前1條

1 張陽;何秀麗;高曉光;李建平;;電紡SnO_2納米纖維的制備及其氣敏特性[A];第十屆全國敏感元件與傳感器學(xué)術(shù)會(huì)議論文集[C];2007年

相關(guān)博士學(xué)位論文 前10條

1 劉金章;一維納米功能材料的制備與特性研究[D];蘭州大學(xué);2006年

2 王志俊;幾種微/納米尺度無機(jī)材料的合成與物性研究[D];中國科學(xué)技術(shù)大學(xué);2007年

3 趙鶴云;SnO_2一維納米材料的制備、表征以及特性研究[D];昆明理工大學(xué);2006年

4 李俊壽;氧化錫納米線自蔓延高溫合成及其機(jī)理的研究[D];太原理工大學(xué);2009年

5 馮海濤;SnO_2納米材料制備與微波吸收性能研究[D];蘭州大學(xué);2010年

6 王理想;氧化物半導(dǎo)體納米線肖特基勢壘的調(diào)控及在氣敏檢測方面的研究[D];河南大學(xué);2010年

7 劉斌;不同微結(jié)構(gòu)SnO、SnO_2納米材料的水熱法制備及其氣敏和光催化性能研究[D];陜西師范大學(xué);2013年

8 李延根;SnO_2空心納米結(jié)構(gòu)的制備及其氣敏性能研究[D];吉林大學(xué);2013年

9 婁正;金屬氧化物半導(dǎo)體復(fù)合材料納米結(jié)構(gòu)的構(gòu)筑及其氣敏性能的研究[D];吉林大學(xué);2014年

10 杜海英;雙極性雙噴頭靜電紡絲制備氣敏材料及其敏感特性研究[D];大連理工大學(xué);2013年

相關(guān)碩士學(xué)位論文 前10條

1 黃瑾;摻雜SnO_2納米線的生長，，表征和應(yīng)用[D];湖南大學(xué);2009年

2 王鐸;碳化硅/聚酰亞胺基低介電常數(shù)復(fù)合材料制備與特性研究[D];西安理工大學(xué);2006年

3 楊艷霞;纖蛇紋石酸浸及其制備氧化硅納米線的研究[D];中南大學(xué);2007年

4 曾春來;SnO_2一維納米結(jié)構(gòu)的控制生長與表征[D];湖南師范大學(xué);2007年

5 李鳳麗;一維SnO_2和Ag/SnO_2納米結(jié)構(gòu)的制備及其電輸運(yùn)性質(zhì)研究[D];河南大學(xué);2009年

6 羅志華;SnO_2一維復(fù)合納米材料的制備與物性研究[D];湖南師范大學(xué);2009年

7 吳晉;二氧化錫一維納米材料控制合成及其物性研究[D];華東師范大學(xué);2009年

8 楊靜;金屬氧化物半導(dǎo)體納米材料的制備和性能研究[D];北京化工大學(xué);2010年

9 葛洪磊;稀釋磁性半導(dǎo)體Sn_(1-x)Mn_xO_2一維納米結(jié)構(gòu)生長機(jī)制和輸運(yùn)性質(zhì)的研究[D];蘭州大學(xué);2012年

10 范雪姣;SnO_2/石墨烯復(fù)合物的制備及其協(xié)同效應(yīng)的研究[D];燕山大學(xué);2012年

本文編號(hào)：1809280