%0 Journal Article
%T A visible light-responsive iodine-doped titanium dioxide nanosphere<br>
%A Zhiqiao He
%A Liyong Zhan
%A Fangyue Hong
%A Shuang Song
%A Zhengying Lin
%A Jianmeng Chen
%A Mantong Jin
%A <br>
%J 环境科学学报(英文版)
%D 2011
%I 
%X I-doped titanium dioxide nanospheres (I-TNSs) were synthesized via a two-step hydrothermal synthesis route, their potential for the e cient 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 di raction 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 e ciency compared with I-TiO2 after 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.
%K I-doped titanium dioxide
%K nanospheres
%K Methyl Orange
%K visible light<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=E80817E2148807B87119D6A2B1A23D1D&yid=9377ED8094509821&vid=EA389574707BDED3&iid=CA4FD0336C81A37A&sid=43608FD2E15CD61B&eid=C5F8B8CB20F1B3D8&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=34