|
|||||
|
|
Synthesis of carbon nanotube/anatase titania composites by a combination of sol-gel and self-assembly at low temperature |
|
| Authors: | Changyuan Hu Rongfa Zhang Junhuai Xiang Tingzhi Liu Wenkui Li Mingsheng Li Shuwang Duo Fei Wei |
| Affiliation: | a Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China b School of Materials Science and Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R. China c Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University, Beijing 100084, P.R. China d Department of Chemical Engineering, Tsinghua University, Beijing 100084, P.R. China |
| Abstract: | A simple method is described for the synthesis of carbon nanotube/anatase titania composites by a combination of a sol-gel method with a self-assembly technique at 65 °C. This method makes use of polyelectrolyte for wrapping multi-walled carbon nanotube (MWCNT) and providing them with adsorption sites for electrostatically driven TiO2 nanoparticle deposition. The composites were characterized using X-ray diffraction, transmission electron microscopy, Fourier transform infrared and X-ray photoelectron spectroscopy, and photoluminescence for analyzing their crystal phase, microstructure, particle size, and other physicochemical properties. The results showed that MWCNT were covered with an anatase TiO2 thin layer or surrounded by an anatase TiO2 thick coating, which is constructed of TiO2 particles about 6 nm in size. The composites were rich in surface hydroxyl groups. The excited e− in conduction band of TiO2 may migrate to MWCNT. Concerning the potential applicability, MWCNT/TiO2 composites showed excellent photocatalytic activity toward the photodegradation of methyl orange. |
| Keywords: | TiO2 Carbon nanotubes Sol-gel Self-assembly Photodegradation Methyl orange |
| 本文献已被 ScienceDirect 等数据库收录！ | |