Carbon nanotubes/TiO2 nanotubes composite photocatalysts for efficient degradation of methyl orange dye--颗粒学报PARTICUOLOGY

Jiang, T., Zhang, L., Ji, M., Wang, Q., Zhao, Q., Fu, X., & Yin, H. (2013). Carbon nanotubes/TiO2 nanotubes composite photocatalysts for efficient degradation of methyl orange dye. Particuology, 11(6), 737–742. https://doi.org/10.1016/j.partic.2012.07.008

Carbon nanotubes/TiO₂ nanotubes composite photocatalysts for efficient degradation of methyl orange dye

Tingshun Jiang^*, Lei Zhang, Meiru Ji, Qian Wang, Qian Zhao, Xiaoqi Fu, Hengbo Yin

School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China

10.1016/j.partic.2012.07.008

Volume 11, Issue 6, December 2013, Pages 737-742

Received 9 January 2012, Revised 28 June 2012, Accepted 6 July 2012, Available online 27 February 2013.

E-mail: tshjiang@ujs.edu.cn

Highlights

► CNTs/TNTs composite photocatalysts were prepared by mixing CNTs and TNTs in nitric acid solution.

► Photocatalytic activities were evaluated under UV light using methyl orange as model pollutant.

► CNTs/TNTs with CNTs content of 0.10 calcined at 450 °C exhibited higher photocatalytic activity.

► Degradation efficiency of CNTs/TNTs was reduced only 7.6% after three cycles for methyl orange.

Abstract

A series of carbon nanotubes/TiO₂ nanotubes (CNTs/TNTs) composite photocatalysts were successfully prepared by incorporation of CNTs in HNO₃ washing process. These photocatalysts were characterized by XRD, N₂ physical adsorption, UV–vis diffuse reflectance spectroscopy, TEM and Raman spectroscopy, respectively, and their photocatalytic activities were tested by using methy1 orange (MO) as a model compound. Also, the effects of amount of CNTs incorporated, calcination temperature and amount of catalyst on the photocatalytic activity of the composite photocatalyst were systematically investigated. The results show that the CNTs/TNTs composite exhibits much higher photocatalytic activity than that of the TNTs or CNTs alone.

Graphical abstract

Keywords

Carbon nanotube; TiO₂ nanotube; Composite photocatalyst; Characterization; Photocatalytic activity; Methyl orange

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