物理化学学报2011，Vol.27Issue(6)：1509-1515,7.
二氧化钛涂覆多壁碳纳米管的制备及可见光催化活性
Preparation and Visible Light Photocatalytic Activity of Titanium Dioxide Coated Multiwalled Carbon Nanotubes
摘要
Abstract
Titanium dioxide coated multiwalled carbon nanotubes (MWCNTs) composite photocatalysts were prepared by the controllable oxidation of titanium carbide coated MWCNTs obtained by the molten salt method using MWCNTs as a reaction template and metal titanium powder as a titanium source. The effects of the molten salt reaction temperature, the molar ratio of MWCNTs to titanium powder, and the oxidation temperature on the structure and morphology of the products were investigated. The samples were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM),transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The photodegradation of a methylene blue (MB) solution was used to evaluate the photocatalytic activity of the catalyst under visible light irradiation (λ＞420 nm). The results suggest that the TiO2 coated MWCNTs keep the similar fibred morphology with the pristine MWCNTs. Uniform and fine well-dispersed TiO2 coatings on the surface of MWCNTs closely contact with the MWCNTs support and Ti- O- C chemical bonds form between them. The prepared TiO2/MWCNTs photocatalyst shows higher visible light photocatalytic activity because the MWCNTs increase the adsorption of methylene blue on the photocatalyst and an impurity state is formed close to the valence band of titanium dioxide, which can enhance the absorption and utilization of solar energy.关键词
碳纳米管/二氧化钛/碳掺杂/涂层/光催化Key words
Carbon nanotube/ Titanium dioxide/ Carbon doping/ Coating/ Photocatalysis分类
化学化工引用本文复制引用
丛野,秦云,李轩科,董志军,袁观明,崔正威..二氧化钛涂覆多壁碳纳米管的制备及可见光催化活性[J].物理化学学报,2011,27(6):1509-1515,7.基金项目
国家自然科学基金(20803054,50972110)资助项目 （20803054,50972110）
