Preparation of activated carbon fibers supported TiO₂ photocatalyst and evaluation of its photocatalytic reactivity

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• 作者：Fu ; Pingfeng ; Luan ; Yong ; Dai ; Xuegang
• 关键词：Molecular adsorption&ndash ; deposition method ; Activated carbon fibers ; Titanium dioxide ; Photocatalytic reactivity ; Degradation
• 刊名：Journal of Molecular Catalysis A: Chemical
• 出版年：2004
• 出版时间：November 1, 2004
• 年：2004
• 卷：221
• 期：1-2
• 页码：81-88
• 全文大小：442 K

文摘

Activated carbon fibers (ACFs) supported TiO₂ photocatalyst was successfully prepared by a molecular adsorption–deposition (MAD) method followed by calcination in a stream of Ar gas. The photocatalyst developed was characterized by SEM, XRD, XPS, BET surface area and UV–vis adsorption spectroscopy. SEM observation showed TiO₂ was deposited on almost each carbon fiber with a coating thickness of about 100nm, and the space between adjacent fibers was remained unfilled to allow UV light to penetrate into the felt-form photocatalyst to a certain depth. Anatase-form TiO₂ was uniquely developed even as calcination temperatures rose up to 900°C. Tight contact of thin TiO₂ coating to carbon fibers surfaces was supposed to suppress phase transformation of TiO₂ from anatase to rutile, and to keep high crystallinity of anatase. As confirmed by XRD and XPS examinations, the micrographic structure and surface properties of ACFs had not been damaged by the deposition process and calcination at high temperatures.