奈米碳管海綿氣體偵測器之製作與性質研究

On the Fabrication and characterization of carbon nanotube sponges gas sensor

李宗霖(Lee, Tsung Lin)

指導教授 ： 張士欽 ； 徐文光

國立清華大學/工學院/材料科學工程學系/碩士(2015年)

https://doi.org/10.6843/NTHU.2015.00209

摘要

本研究運用酸化的多壁奈米碳管（MWCNT）來製備新一代的氣體偵測器，並針對醇類以及其混合物去進行氣體偵測分析。多璧奈米碳管首先進行酸化處理，酸化後的碳管溶於水中並與聚乙烯醇水溶液混合形成一個分散均勻的混合溶液，接著將溶液注入預先準備好的鐵氟龍（Teflon）管中，以Freeze-drying的方式製備出碳管海綿。運用奈米碳管海綿製備而成的氣體偵測器可以偵測在飽合蒸氣壓下水與不同的醇類以及其在不同濃度下的混合物。本研究同時探討其氣體吸附的機制，並分析氣體偵測器對不同種類的受測物其響應值與其分子極性和蒸氣壓乘積間的關係。

關鍵字

奈米碳管 ； 氣體偵測器 ； 奈米碳管海綿

並列摘要

Novel gas sensors based on functionalized multi-wall carbon nanotubes (MWCNTs) were fabricated and characterized with alcohols and their mixtures. MWCNTs (Multi-walled-carbon-nanotubes) were first functionalized by acid treatment and were then dispersed in PVA solution. The solution was then transferred into Teflon tubes to fabricate CNT foams by freeze-drying. The sensors were capable of distinguishing water and different alcohols at saturated pressure and their mixtures of varying concentrations. The operating mechanisms for the fabricated sensors were proposed, wherein correlations between the sensitivity of the sensor and the product of the molecular polarity and vapor pressure of different vapors were established and experimentally demonstrated.

並列關鍵字

carbon nanotube ； gas sensor ； carbon nanotube foam

參考文獻

11. 侯鈺玲, 奈米碳管海棉氣體檢測器的製作與特性研究. 2013, 國立清華大學材料科學工程學系碩士論文: 新竹市.

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