Surface modification of TiO2 with g-C3N4 for enhanced UV and visible photocatalytic activity
Surface modification of TiO2 with g-C3N4 for enhanced UV and visible photocatalytic activity
复制标题
g-C3N4 对 TiO2 进行表面修饰以增强紫外和可见光催化活性
DOI：
10.1016/j.jallcom.2015.01.080
复制
发表时间：
2015-05-15
影响因子：
6.2
通讯作者：
Zhang, Jinlong
中科院分区：
文献类型：
--
作者：
Lei, Juying;Chen, Ying;Zhang, Jinlong
通过简单的煅烧工艺制备了g-C3 N4改性TiO 2复合材料。采用X射线衍射（XRD）、漫反射光谱（DRS）、傅立叶变换红外光谱（FT-IR）、透射电子显微镜（TEM）、热重-差热分析（TG-DTA）和X射线光电子能谱（XPS）对样品进行了表征，证明g-C3 N4对TiO 2的改性是成功的。以酸性橙子7（AO 7）为光催化剂，考察了复合材料的光催化活性，结果表明，复合材料在可见光和紫外光下均具有良好的光催化活性。此外，碱处理，然后引入到研究g-C3 N4和TiO 2之间的相互作用。用碱去除改性后的g-C3 N4后，没有发现氮掺杂在TiO 2晶格中，说明g-C3 N4是表面附着在TiO 2上的，这说明g-C3 N4/TiO 2复合材料光催化活性的提高是由于两种半导体之间的协同作用。(C)2015 Elsevier B. V.版权所有。
g-C3N4 modified TiO2 composites were prepared through a simple calcination process of anatase and cyanamide. The as-prepared samples were characterized by X-ray diffraction (XRD), diffuse reflectance spectrophotometry (DRS), fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), thermogravimetry differential thermal analysis (TG-DTA) and X-ray photoelectron spectroscopy (XPS), proving a successful modification of TiO2 with g-C3N4. Photodegradation of acid orange 7 (AO7) was used to evaluate the photocatalytic activities of the composites, showing excellent activity of them under both visible and UV light. In addition, base treatment was then introduced to investigate the interaction between g-C3N4 and TiO2. After removing the g-C3N4 modified on TiO2 by base, no nitrogen doping is found in TiO2 lattice, demonstrating the g-C3N4 was surface attached on TiO2 and attributing all improvement of photocatalytic activity of g-C3N4/TiO2 composite to the synergy between the two semiconductors. (C) 2015 Elsevier B.V. All rights reserved.