Surface characteristics and photocatalytic activity of TiO2 loaded on activated carbon fibers
Surface characteristics and photocatalytic activity of TiO2 loaded on activated carbon fibers
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DOI：
10.1016/j.colsurfa.2004.11.027
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发表时间：
2005-03
期刊：
影响因子：
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通讯作者：
Rusheng Yuan;Jingtang Zheng;Rongbo Guan;Yucui Zhao
中科院分区：
文献类型：
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作者：
Rusheng Yuan;Jingtang Zheng;Rongbo Guan;Yucui Zhao
以环氧树脂为前驱体，在N2气氛下，通过不同温度煅烧，将TiO 2负载到活性炭纤维（ACF）上，并对其表面特性和对亚甲基蓝的光催化活性进行了详细的研究。负载TiO 2后，ACF的孔结构得到了很好的保持。SEM和TEM观察表明，负载在ACF上的TiO 2以小团簇的形式存在，一次粒子仍保持在纳米级。在不同温度下煅烧后，环氧树脂在TiO 2表面的残留导致了TiO 2的紫外-可见光谱和红外光谱的变化，从而反映出其光催化活性的差异。460°C焙烧的样品光催化活性最好，重复使用后仍保持较高的活性。即使在第六次循环时，TiO 2/ACF复合材料的MB去除量仍然略高于悬浮液中新鲜P25的MB去除量。
TiO2loaded on activated carbon fibers (ACF) was performed by using epoxy resin as the precursor of the link between them, followed by calcination at different temperatures in N2atmosphere, and detailed surface characteristics and photocatalytic activity for methylene blue have been carried out. The pore structure of ACF was preserved well after loading with TiO2particles. From SEM and TEM images, it was observed that TiO2loaded on ACF was in the form of small clusters, and the primary particles still kept in nanometer size. Upon calcination at different temperatures, the residue of epoxy resin on the surface of TiO2resulted in the changes in UV–vis and IR spectra, which reflected in the differences of photocatalytic activity. The sample calcined at 460°C exhibited the best photocatalytic activity, and still maintained high activity without any decrease when used repeatedly. Even at the sixth cycle, the amount of MB removal for TiO2/ACF composite was still slightly higher than that for fresh P25 in suspension.