Photocatalytic activity of TiO2 containing anatase nanoparticles and rutile nanoflower structure consisting of nanorods
Photocatalytic activity of TiO2 containing anatase nanoparticles and rutile nanoflower structure consisting of nanorods
复制标题
含有锐钛矿纳米粒子和由纳米棒组成的金红石纳米花结构的TiO2的光催化活性
DOI：
10.1016/s1001-0742(12)60318-0
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发表时间：
2013-12-01
影响因子：
6.9
通讯作者：
Chen, Jianmeng
中科院分区：
文献类型：
--
作者：
He, Zhiqiao;Cai, Qiaolan;Chen, Jianmeng
以钛酸丁酯和浓盐酸为原料，采用水热法合成了一系列不同晶相和形貌的二氧化钛。通过紫外-可见光照射下降解水溶液中的甲基橙（Methyl橙子）评价了样品的光催化活性。通过对高分辨透射电镜、X射线粉末衍射、X射线光电子能谱和Brunauer-Emmett-Teller测试等表征结果的分析，认为催化剂的光催化活性与催化剂的三维形貌和晶相组成直接相关。一种优良的催化剂应该同时具有金红石三维花状结构和微细粒颗粒。三维花状结构可以增强光的捕获，以及反应物分子从本体溶液到TiO 2上的反应位点的转移。此外，发现最佳的金红石/金红石相比例为80：20，这有利于光生电子-空穴对的有效分离。
A series of TiO2 with different crystal phases and morphologies was synthesized via a facile hydrothermal process using titanium n-butoxide and concentrated hydrochloric acid as raw materials. The photocatalytic activity of the samples was evaluated by degradation of Methyl Orange in aqueous solution under UV-Visible light irradiation. On the basis of detailed analysis of the characterizing results of high-resolution transmission electron microscopy, X-ray powder diffraction measurements, X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller measurement, it was concluded that the photo-activity of the catalyst is related directly to the 3D morphology and the crystal phase composition. An excellent catalyst should have both a rutile 3D flower-like structure and anatase granulous particles. The 3D flower-like structure could enhance light harvesting, as well as the transfer of reactant molecules from bulk solution to the reactive sites on TiO2. In addition, the optimum anatase/rutile phase ratio was found to be 80:20, which is beneficial to the effective separation of the photogenerated electron-hole pairs.