Preparation and photocatalytic activity of N-Ag co-doped TiO₂/C porous ultrafine fibers mat

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• 作者：Nan Wu ; Yingde Wang ; Yongpeng Lei ; Bing Wang
• 关键词：Photocatalyst ; Co-doped ; Electrospinning
• 刊名：Ceramics International
• 出版年：January, 2014
• 年：2014
• 卷：40
• 期：1_part_PB
• 页码：2017-2022
• 全文大小：1434 K

文摘

N-Ag co-doped TiO₂/C porous ultrafine fibers mat was prepared by a sol-gel/electrospinning process using polyacrylonitrile (PAN) as a precursor and Ti (OC₄H₉)₄, AgNO₃, urea as titanium, silver, nitrogen source, respectively. The porous structure was obtained by etching SiO₂ nano-particles. Structure and properties of the fibers mat were characterized by SEM, TEM, XRD, XPS, UV-vis, Raman spectroscopy and N₂ physical adsorption analysis. Silver ion and SiO₂ nano-particles have a great influence on the crystallization of TiO₂. The photocatalytic activity was measured by the degradation of methylene blue (MB) under visible light irradiation. N-Ag co-doped TiO₂/C fibers mat exhibited much higher photocatalytic destruction rate than P25. The photocatalytic efficiency of porous fibers mat increased by 11% after etching.