Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (01): 8-14.doi: 10.13475/j.fzxb.20181004207

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Modification of activated carbon fiber using graphene oxide doped titanium dioxide

LUO Jiani, LI Lijun, ZHANG Xiaosi, ZOU Hantao(), LIU Xueting   

  1. Key Laboratory of Green Processing and Functional Textile Materials,Ministry of Education, Wuhan Textile University, Wuhan, Hubei 430200, China
  • Received:2018-10-23 Revised:2019-08-09 Online:2020-01-15 Published:2020-01-14
  • Contact: ZOU Hantao E-mail:hantao.zou@wtu.edu.cn

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Abstract:

In order to better tackle wastewater pollution, activated carbon fiber was modified to improve adsorption performance. In this paper, graphene oxide (GO) doped titanium dioxide (TiO2) solution was prepared using the sol-gel method. The GO-TiO2 was successfully loaded on the activated carbon fibers (ACFs) using the immersion-pulling method. The effect of GO doping content on the performances of the modified GO-TiO2/ACFs was investigated. The microstructure and surface morphology were characterized by Fourier transform infrared spectrometer, Raman spectra, scanning electron microscope and X-ray diffraction. The photocatalytic degradation and adsorption kinetics of the modified ACFs under visible light were studied, and the results show that TiO2 in the prepared GO-TiO2/ACFs mainly consists of anatase phase. The GO doping prevented the growth and agglomeration of TiO2 crystal and resulted in smaller crystal size of TiO2, decreasing from 15.7 nm to 8.1 nm. Compared to TiO2/ACFs, the GO-TiO2/ACFs with a small content of GO demonstrated a superior adsorption performance under the visible light, and the removal rate of methylene blue increased from 65% to 85%. The GO-TiO2/ACFs adsorption results manifested better conformation with the pseudo-second-order kinetics model than the pseudo-first-order kinetics model.

Key words: activated carbon fiber, titanium dioxide, graphene oxide, photocatalytic performance, sol-gel method

CLC Number: 

  • TS102.6

Fig.1

FT-IR spectrum of GO doped TiO2 activated carbon fiber"

Fig.2

Raman spectrum of GO doped TiO2 activated carbon fiber"

Fig.3

XRD pattern of GO doped TiO2 activated carbon fiber"

Fig.4

SEM images of GO doped TiO2 activated carbon fiber(×1 000)"

Fig.5

Adsorption curve of GO doped TiO2 activated carbon fiber under visible light"

Tab.1

Kinetic parameters for adsorption of MB onto GO doped TiO2 activated carbon fiber under visible light"

样品名称 样品含量
(m(GO):m(Ti))		 qe/
(mg·g-1)		 准一级动力学方程 准二级动力学方程
k1/min-1 R2 qe1/(mg·g-1) k2/min-1 R2 qe2/(mg·g-1)
TiO2/ACF 0:1 0.610 0.242 0.952 0.792 2.598 0.993 2 0.618
GO-Ti700/ACF 1:700 0.822 0.176 0.885 1.058 1.562 0.995 4 0.836
GO-Ti350/ACF 1:350 0.873 0.359 0.901 1.214 1.422 0.998 5 0.885
GO/ACF 1:0 0.721 0.218 0.842 0.862 1.254 0.995 1 0.742
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