TiO2-loaded activated carbon fiber: Hydrothermal synthesis, adsorption properties and photo catalytic activity under visible light irradiation--颗粒学报PARTICUOLOGY

Meng, H., Hou, W., Xu, X., Xu, J., & Zhang, X. (2014). TiO2-loaded activated carbon fiber: Hydrothermal synthesis, adsorption properties and photo catalytic activity under visible light irradiation. Particuology, 14, 38–43. https://doi.org/10.1016/j.partic.2013.04.006

TiO₂-loaded activated carbon fiber: Hydrothermal synthesis, adsorption properties and photo catalytic activity under visible light irradiation

Hao Meng, Wei Hou, Xinxin Xu, Junli Xu, Xia Zhang^*

Department of Chemistry, College of Science, Northeastern University, Shenyang 110819, China

10.1016/j.partic.2013.04.006

Volume 14, June 2014, Pages 38-43

Received 18 January 2013, Revised 25 March 2013, Accepted 12 April 2013, Available online 25 June 2013.

E-mail: xzhang@mail.neu.edu.cn

Highlights

• TiO₂ nanoparticles were deposited on activated carbon fibers by hydrothermal method.

• TiO₂ loading could be adjusted by altering the initial concentration of TBOT.

• TiO₂/ACF showed photocatalytic activity toward RhB under visible light irradiation.

• Composite fiber with 75.1% of TiO₂ presented best degradation rates (67.6%).

Abstract

TiO₂-loaded activated carbon fibers (ACF) were prepared by a hydrothermal method. The samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectrometry and UV–vis diffuse reflectance spectra (DRS). SEM images showed that the TiO₂ nanoparticles were deposited on the surface of ACF, and the particle size and loading amount of TiO₂ were varied by changing the initial concentration of tetrabutyl titanate (TBOT). The results of an ash experiment showed that the loading amounts of TiO₂ were 18.4%, 43.3%, 52.5%, 75.1%, and 91.1% for initial concentrations of TBOT of 0.07, 014, 0.21, 0.28, and 0.35 mol/L, respectively. Physical interactions played an important role in the formation of TiO₂/ACF composite fibers that absorb UV and visible light. Compared with those of ACF, improved adsorption and photocatalytic activity toward Rhodamine B (RhB) were observed for TiO₂/ACF composite fiber. The Rhodamine B could be removed efficiently by TiO₂/ACF composite fibers, and the TiO₂ loading amount had a significant effect on the photocatalytic activity of TiO₂/ACF composite fibers.

Graphical abstract

Keywords

Activated carbon fiber (ACF); TiO₂ nanoparticles; Adsorption property; Photocatalytic activity; Hydrothermal synthesis

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