以氣化法合成中孔洞碳材

Synthesis of carbon mesoporous materials by the evaporization method

吳琦瑋(Chi-Wei Wu)

指導教授 ： 鄭吉豐

中原大學/理學院/化學研究所/碩士(2009年)

https://doi.org/10.6840/cycu200901316

摘要

本研究是希望利用氣化法將金屬氧化物及碳源能同時進入中孔洞分子篩表面及孔洞內。本方法較傳統浸泡法較簡單及快速。
我們使用金屬氧化物如氯化鐵或氯化亞鈷與糠醇在低溫下同時氣化於SBA-15表面及孔洞內，再900℃進行碳化，最後用HF將矽源去除，形成中孔洞碳材。此實驗產物使用X射線粉末繞射儀、低真空掃描式電子顯微鏡、氮氣等溫吸附/脫附儀來分析。由氮氣等溫吸附/脫附結果看出最終所得的中孔洞碳材擁有高的表面積，約在1412~1640 m2/g，由XRD結果也能看出碳材仍維持六角形結構，表示氣化法可有效合成規則排列中孔洞碳材。但是，實驗結果也証明氣化法對金屬源吸附不佳。

關鍵字

碳材 ； 金屬

並列摘要

We designed a new method to make regular mesoporous carbon materials by vaporizing metal-oxide and carbonaceous source into mesoporous silica pores or surface on the same time. The vaporization method is simply and quickly than the classic impregnation method.
SBA-15 silica was a template for the syntheses of mesoporous carbon materials and prepared using the tri-block copolymer surfactant of P123, and silica source of TEOS in an acidic solution. The metal-oxide sources such as FeCl3 or CoCl3∙6H2O and carbonaceous source of FA were vaporized into SBA-15 on the same time at low temperature. Resultants were heating at 900°C under vacuum. Finally, the mesoporous carbon materials were obtained after removing silica part of silica-carbon mesoporous.
The resulting materials were characterized by XRD, N2 adsorption/desorption, SEM, EDX. The mesoporous carbon materials have hexagonal meso-structure and high surface area near 1412~1640 m2/g. However, the metal sources can not be adsorbed on SBA-15, probably due to inability of ion-exchange metal sources with silica surface silanol group.

並列關鍵字

carbon ； metal

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