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研究生:吳志淦
研究生(外文):Jhih-Gan Wu
論文名稱:室溫下奈米碳管添加於Co3O4-SnO2在一氧化碳感測上之研究
論文名稱(外文):CNT doped in Co3O4-SnO2 application for CO sensing at room working temperature
指導教授:吳仁彰
指導教授(外文):Ren-Jang Wu
學位類別:碩士
校院名稱:靜宜大學
系所名稱:應用化學研究所
學門:自然科學學門
學類:化學學類
論文種類:學術論文
論文出版年:2007/07/
畢業學年度:95
語文別:中文
論文頁數:95
中文關鍵詞:一氧化碳感測器
外文關鍵詞:sensorCOCo3O4
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本研究由硝酸鈷當做起始物,加入NaOH後製作CoOOH。將CoOOH與不同重量比例的SnO2混合經400℃鍛燒4小時後得到不同比例的產物,並以TPR、TG、XRD分析樣品性質,將合成的材料作為CO氣體感測器的感測材料。
由實驗結果得知材料的重量比Co3O4-SnO2 = 1:4時為佳,在室溫下對CO的靈敏度(S=ΔmV)為23,反應時間(response time)t90=60秒,tR=65秒。
加入一些貴重金屬後Pt、Au、Ag、Cu未能提高CO的靈敏度,而加入0.1%CNT時靈敏度上升為192 ,t90=120秒,tR=150秒,反應在3分鐘內完成。優點在於實驗時在室溫下就可偵測而文獻上都需加溫才能進行,濃度的量測範圍在100-1000ppm。
Cobalt oxide CoOOH was prepared from a Co(NO3)2 solution via a precipitation with NaOH and oxidation in air. A series Co3O4-SnO2 composite were prepared from different weight ratio by calcining at 400℃ for 4h. The prepared samples were characterized by Temperature Programmed Reduction (TPR), Thermal Gravimetric Analyzer (TG/DTA), and X-ray diffraction (XRD) techniques. We applied the samples as a sensing material of CO sensor.
From experimental results, we find that the sample Co3O4-SnO2 = 1:4 better than other composite. The sensitivity(S=ΔmV) of CO in room temperature(S=23) in this study, response time(t90) and recover time(tR) are 60 and 65 second(~1 min).
We add different metals(Pt、Au、Ag、Cu) in composite Co3O4-SnO2 = 1:4 but not improve the sensitivity. Finally, we add 0.1%CNT in composite improve the sensitivity up to 192, t90 and tR are 120 and 150 second(~2-3 min). The sensing range from 100-1000ppm in room temperature.
第一章 序 論
1-1 一氧化碳的介紹
1-2 感測器原理及氣體感測器
1-3 氣體感測器的種類
1-4 金屬氧化物半導體型CO氣體感測器的文獻回顧
1-5 鈷化合物的簡介
1-6 研究目標

第二章 實 驗
2-1 實驗藥品
2-2 樣品製備方法
2-2.1 製備樣品CoOOH
2-2.2 製作感測材料Co3O4-SnO2
2-2.3 製作Co3O4-SnO2混入金屬的材料
2-2.4 製作Co3O4-SnO2混合CNT的材料
2-3 樣品鑑定
2-3.1 程溫還原系統(Temperature-Programmed Reduction,TPR)
2-3.2 熱重分析儀(Thermal Gravimetric Analyzer,TG/DTA)
2-3.3 X光繞射儀(X-Ray Diffraction, XRD)
2-4 製作CO感測器
2-5 氣體感測器的測試

第三章 結果與討論
3-1 感測材料的定性分析
3-1.1感測材料的程溫還原(TPR)分析
3-1.2熱穩定性分析
3-1.3各成份的XRD圖譜
3-2 感測曲線
3-3 各種材料對CO濃1000ppm之反應結果
3-3.1 以不同比例的Co3O4-SnO2為感測材料的感測曲線
3-3.2 以Co3O4-SnO2(1:4)為材料,混入金屬及CNT的感測
3-3.3 對0.1%CNT/Co3O4-SnO2(1:4)不同濃度下的感測結果
3-3.4 CO感測訊號對溫度的變化
3-4 干擾性的測試
3-4.1 0.1%CNT/Co3O4-SnO2(1:4)為材料感測CH4、NO2、H2
3-4.2 CH4、NO2、H2感測訊號對溫度的變化
3-5 穩定度
3-6 反應機構之證明

第四章 結 論

第五章 參考文獻
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