物理化学学报 >> 2013, Vol. 29 >> Issue (03): 585-589.doi: 10.3866/PKU.WHXB201212253

催化和表面科学 上一篇    下一篇

原位碳、氮共掺杂二氧化钛空心球的制备与可见光光催化性能

刘素芹1,2, 戴高鹏1,2, 梁英1,2, 刘华俊1, 梁桂杰2   

  1. 1 湖北文理学院化学工程与食品科学学院, 湖北 襄阳 441053;
    2 低维光电材料与器件湖北省重点实验室, 湖北 襄阳 441053
  • 收稿日期:2012-10-02 修回日期:2012-12-17 发布日期:2013-02-25
  • 通讯作者: 戴高鹏 E-mail:dgp2000@126.com
  • 基金资助:

    湖北省自然科学基金(2012FFB01903)和湖北省教育厅项目(T201215, Z20102601, Q20122507)资助

Fabrication and Visible-Light Photocatalytic Activity of In situ Carbon and Nitrogen Co-Doped TiO2 Hollow Sphere

LIU Su-Qin1,2, DAI Gao-Peng1,2, LIANG Ying1,2, LIU Hua-Jun1, LIANG Gui-Jie2   

  1. 1 Department of Chemical engineering and Food Science; Hubei University of arts and science, Xiangyang 441053, Hubei Province, P. R. China;
    2 Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Xiangyang 441053, Hubei Province, P. R. China
  • Received:2012-10-02 Revised:2012-12-17 Published:2013-02-25
  • Supported by:

    The project was supported by the Natural Science Foundation of Hubei Province, China (2012FFB01903) and Research Program of Hubei Province Department of Education, China (T201215, Z20102601, Q20122507).

摘要:

在H2O2-HF 的乙醇-水混合溶液中, 通过水热处理碳氮化钛(TiCN)制备了碳、氮共掺杂TiO2 空心球(CNTH). 用X 射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、X 射线光电子能谱(XPS)和紫外-可见(UV-Vis)吸收光谱表征了所制备的样品. 在可见光(λ≥400 nm)照射下, 通过降解甲基蓝检测了碳、氮共掺杂TiO2空心球的光催化活性. 结果表明, 源于TiCN中的部分碳和氮原子原位掺入了TiO2的晶格中, 部分碳掺入TiO2点阵的间隙中. 该材料在整个可见光区展示了增强的可见光吸收, 其带边明显红移. 光催化研究表明在强可见光吸收和独特的空心球结构的协同作用下, 碳、氮共掺杂TiO2空心球展示了比P25更高的可见光光催化活性.

关键词: 碳、氮共掺杂, 二氧化钛空心球, 可见光, 光催化

Abstract:

Carbon and nitrogen co-doped TiO2 hollow spheres (CNTHs) were synthesized by hydrothermal treatment of titanium carbonitride (TiCN) in a mixture of H2O2, HF, ethanol, and water. CNTHs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and UV-visible (UV-Vis) diffuse reflectance spectroscopy. Some of the carbon and nitrogen from TiCN was doped into the lattice of TiO2 in situ, and some carbon atoms were incorporated into the interstitial positions of the TiO2 lattice. The CNTHs exhibited enhanced absorption over the whole visible-light region and an obvious red shift at the absorption edges compared with that of TiO2. The ability of the CNTHs to degrade methylene blue (MB) in aqueous solution under visible light irradiation (λ≥400 nm) was investigated. The CNTHs showed much higher photocatalytic activity than P25 in the degradation of MB because of the synergetic effects of their strong visible absorption and unique hollow sphere structure.

Key words: Carbon and nitrogen co-doping, TiO2 hollow sphere, Visible light, Photocatalysis

MSC2000: 

  • O644