Stable Ti3+ Self-Doped Anatase-Rutile Mixed TiO2 with Enhanced Visible Light Utilization and Durability

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• 作者：Yan Zhou ; Changhong Chen ; Ningning Wang ; Yingying Li ; Hanming Ding
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：March 24, 2016
• 年：2016
• 卷：120
• 期：11
• 页码：6116-6124
• 全文大小：573K
• ISSN：1932-7455

文摘

Blue Ti³⁺ self-doped TiO₂ nanoparticles with mixed phases of anatase and rutile have been synthesized via a facile solvothermal method. The phase evolution of the blue TiO₂ varying from anatase to rutile has been studied by simply controlling the initial volume ratios of TiCl₃ to titanium isopropoxide in the reaction solutions. The blue TiO₂ has a distinct improvement of visible light harvesting and remarkable enhancement in photocatalytic activity, which could be ascribed to the presence of Ti³⁺ centers and the synergetic effect between the two phases. In addition, the as-prepared blue TiO₂ shows an excellent stability during the photocatalytic reactions. A photocatalytic mechanism of the self-doped blue TiO₂ was proposed at last.