- 學位論文
沸石修飾二氧化錫之製備及其在氣體感測器上的應用
Preparation of Zeolite Modified Tin Oxide and Its Applications in Gas Sensor
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摘要
中文摘要 二氧化錫是ㄧ種n型之半導體材料。在氣體感測器上之應用具有非常大的潛力。本研究中，我們利用陽離子型界面活性劑CTMABr為有機模板，錫酸鈉為無機前驅物成功製備出介孔二氧化錫材料(以MSn表之)，以及含浸Pt之介孔二氧化錫材料(以zPt-MSn表之)。初合成之MSn和zPt-MSn材料在煅燒400℃後還能維持住其介孔結構，且可以得到高比表面積(約100m2/g)以及狹窄之孔徑分佈。在後處理步驟，我們利用水熱合成法將ZSM-5長在MSn和zPt-MSn材料上(以ZSn及ZSn-zPt表之)。二氧化錫晶粒表面的二氧化矽物質在煅燒過程中抑制了二氧化錫晶粒的成長以提高熱穩定性，因此煅燒後之ZSn及ZSn-zPt材料之比表面積便比MSn及zPt-MSn來得高。但是，其孔洞分佈則比MSn及MSn-zPt來的寬廣。 製備氣體感測器方面，我們嘗試以spin-coating、drop coating及pasting三種製程方法將不同材料於玻璃基板上進行覆膜，最後發現以pasting製程方法適用於所有材料。所製備出之感測器分別對H2和CO進行感測，對於感測H2除了展現靈敏度之外，靈敏度對H2濃度在某濃度範圍內有良好的線性關係；在感測CO方面，結果尚不盡理想。
並列摘要
SnO2 is a n-type semiconductor and has been a key material in applications as gas sensor. In this study, pure and Pt- incorporated mesostructured SnO2 (designated as MSn and zPt-MSn) were prepared by using cationic surfactant (cetyltrimethyl ammoniumbromide, CTMABr ) as the template and sodium stannous trihydrate (Na2SnO3*3H2O) and platiumchloride (PtCl4) as inorganic precursors. The ordered mesoporous structure of MSn and zPt-MSn materials with large specific surface areas (about 100 m2/g) and narrow pore size distribution were maintained after calcination at 400℃. In post synthesis, microporous silica was coated on MSn and zPt-MSn (designated as ZSn and ZSn-zPt) through hydrothermal treatment. This coating increased the thermal stability of the mesoporous SnO2 materials due to the effective inhibition of SnO2 crystal growth. Therefore the surface areas of ZSn and ZSn-zPt materials after calcination were higher than MSn and zPt-MSn. But the pore size distribution were broader. At gas sensor fabrication, the materials were applied as films to glass substrates by spin coating, drop coating and pasting, and all the materials were subjects to sensor detection after pasting as films. The sensors we fabricated were sensing H2 and CO. At sensing H2， the sensors besides showed sensitivity and the effect of concentration of sensing gas H2 on the sensitivity indicates a linear response; at sensing CO, the results were undesirability.
參考文獻
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延伸閱讀
- Chen, T. Y. (2015). 沸石晶種自組裝合成中孔洞二氧化矽奈米材料之結構鑑定及催化應用 [master's thesis, National Taiwan University]. Airiti Library. https://doi.org/10.6342/NTU.2015.00675
- 林義峰（2010）。微孔沸石薄膜於二氧化碳分離之應用。化工，57(4)，78-96。https://doi.org/10.29803/CE.201008.0009
- 陳文苓（2008）。沸石薄膜與具胺基中孔洞二氧化矽的製備以及二氧化碳吸附的應用〔碩士論文，國立清華大學〕。華藝線上圖書館。https://doi.org/10.6843/NTHU.2008.00336
- 張均豪（2007）。Preparation of ZnO nanostructure for MOS gas sensor by sol-gel method〔碩士論文，國立臺灣師範大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0021-2910200810573764
- Vera, M. L., Rosenberger, M. R., Schvezov, C. E., & Ares, A. E. (2015). Fabrication of TiO_2 Crystalline Coatings by Combining Ti-6Al-4V Anodic Oxidation and Heat Treatments. International Journal of Biomaterials, 2015(), 33-41. https://doi.org/10.1155/2015/395657