奈米銀線核殼結構觸媒製備及應用

Preparation and Characterization of Silver Nanowire Catalyst for VOCs Oxidation

吳信賢(Hsin-Hsien Wu) ； 周更生(Kan-Sen Chou)

《燃燒季刊》 82期 (2013/08) Pp. 17-28

https://doi.org/10.30041/CQ.201308_(82).0003

摘要

奈米銀線特殊結構吸引需多研究者投入，本研究證明其作為VOCs 觸媒具有優於一般銀粒子的催化活性。為進一步增加催化活性，其本研究設計了核殼結構觸媒的合成方法，並探討了奈米銀線觸媒活性以及核殼結構對奈米銀線的結構及活性的幫助程度。研究結果顯示，以多元醇法披覆金屬氧化物殼層之方式讓奈米銀線的結構特徵在披覆金屬氧化物殼層後不會發生顯著變化。奈米銀線-氧化鈰核殼結構觸媒在175℃可以有95%的異丙醇轉化率，較奈米銀線可以降低25℃。未來若要進一步增加觸媒活性，可以朝向控制殼層型態、增加孔隙來減少質傳阻力、增加活性。

關鍵字

揮發性有機物 ； 奈米銀線 ； 核殼結構 ； 金屬氧化物

並列摘要

For the development of effectively and economically VOCs control technology, we propose a polyol process to fabrication silver nanowire core and metal oxide shell nano-catalysts. These catalysts were then characterized and tested for the catalytic removal of IPA at different temperatures. The silver nanowire exhibited higher oxidation activities than that the polycrystalline silver particle. Moreover, the silver nanowire@CeOx core-shell particles showed the highest activity among the catalysts and could completely oxidize 125 ppm IPA at 175℃. Our results also indicated that the nano-structure of silver wire would not change significantly after the core-shellstructured prepared by the polyol process.

並列關鍵字

volatile organic compounds ； silver nanowire ； core-shell structure ； metal oxide