Controllable One-Pot Synthesis and Enhanced Visible Light Photocatalytic Activity of Tunable C-Cl-Codoped TiO2 Nanocrystals with High Surface Area
Controllable One-Pot Synthesis and Enhanced Visible Light Photocatalytic Activity of Tunable C-Cl-Codoped TiO2 Nanocrystals with High Surface Area
复制标题
高比表面积可调C-Cl共掺杂TiO2纳米晶的可控一锅法合成及增强可见光光催化活性
DOI：
10.1021/jp909888n
复制
发表时间：
2010-01-21
影响因子：
3.7
通讯作者：
Zhang, Lizhi
中科院分区：
文献类型：
--
作者：
Xu, Hua;Zhang, Lizhi
我们证明了控制合成的C-Cl-共掺杂TiO 2，纳米晶体的水解四异丙醇钛（TTIP）在氯仿中含有微量的水在150摄氏度的低温下，没有随后的热程序。C和Cl掺杂剂是由水诱导氯仿的溶剂热分解产生的，并且调节水与TTIP的摩尔比能够调节晶体尺寸和掺杂剂浓度。采用X射线衍射（XRD）、透射电子显微镜（TEM）、高分辨透射电子显微镜（HRTEM）、氮吸附、X射线光电子能谱（XPS）和紫外-可见漫反射光谱（DRS）等手段对粉体进行了表征。C-Cl共掺杂的TiO 2具有介孔结构，比表面积在158.1 ~ 469.6m2/g之间。以罗丹明B（RhB）为目标物，考察了C-Cl共掺杂TiO 2纳米晶在可见光下的光催化活性。在所有合成的C-Cl-共掺杂TiO 2中，水与TTIP的摩尔比为2时合成的样品表现出最高的光活性。其活性甚至远高于我们以前工作中报道的C-TiO_2和Cl-TiO_2。C-Cl共掺杂TiO 2纳米粒子的可见光催化活性的提高主要归因于C-Cl共掺杂的协同效应和较大的比表面积。
We demonstrate the controlled synthesis of C-Cl-codoped anatase TiO2, nanocrystals by hydrolysis of titanium tetraisopropoxide (TTIP) in chloroform containing trace amounts of water at a low temperature of 150 degrees C without subsequent thermal procedure. The C and Cl dopants resulted from the solvothermal decomposition of chloroform induced by water, and the adjusting of molar ratios of water to TTIP was able to tune the crystal sizes and the concentration of the dopants. The as-prepared powders were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), nitrogen adsorption, X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectroscopy (DRS). All the C-Cl-codoped TiO2 possessed mesoporous Structure and high Surface areas between 158.1 and 469.6 m(2)/g. The photocatalytic activities of the resulting C-Cl-codoped TiO2 nanocrystals were evaluated by the photodegradation of RhB Under visible light irradiation. The sample synthesized with it molar ratio of water to TTIP equal to 2 exhibited the highest photoactivity among all the synthesized C-Cl-codoped TiO2. Its activity was even much higher than that of the C-TiO2 and Cl-TiO2 reported in our previous work. The enhanced visible light photocatalyitc activity of that C-Cl-codoped TiO2 nanocrystal Could be primarily attributed to the large surface area and the synergetic effect of the codoping.