A visible light-responsive iodine-doped titanium dioxide nanosphere.
A visible light-responsive iodine-doped titanium dioxide nanosphere.
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DOI：
10.1016/s1001-0742(10)60389-0
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发表时间：
2011
影响因子：
6.9
通讯作者：
Zhiqiao He;Liyong Zhan;Fangyue Hong;Shuang Song;Zheng-Kun Lin;Jianmeng Chen;Mantong Jin
中科院分区：
文献类型：
--
作者：
Zhiqiao He;Liyong Zhan;Fangyue Hong;Shuang Song;Zheng-Kun Lin;Jianmeng Chen;Mantong Jin
I-doped titanium dioxide nanospheres (I-TNSs) were synthesized via a two-step hydrothermal synthesis route, their potential for the efficient utilization of visible light was evaluated. The prepared anatase-phase I-TNSs had a bimodal porous size distribution with a Brunauer-Emmett-Teller surface area of 76 m2/g, a crystallite size of approximately 14 nm calculated from X-ray diffraction data, and a remarkable absorption in the visible light region at wavelengths > 400 nm. The photocatalytic activity of the samples was evaluated by decoloration of Methyl Orange in aqueous solution under visible light irradiation in comparison to the iodine-doped TiO2(I-TiO2). The I-TNSs showed higher photocatalytic efficiency compared with I-TiO2after irradiation for 180 min even though the latter had a much greater surface area (115 m2/g). It was concluded that the surface area was not the predominant factor determining photocatalytic activity, and that the good crystallization and bimodal porous nanosphere structure were favourable for photocatalysis.
