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Preparation of TiO2/activated carbon with Fe ions doping photocatalyst and its application to photocatalytic degradation of reactive brilliant red K2G

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Abstract

Titanium dioxide coated on activated carbon (AC) with Fe ions doping (Fe-TiO2/AC) composite was prepared by an improved sol-gel method. The photocatalytic activities were tested by photocatalytic degradation of reactive brilliant red K2G in solution. The results show that in comparison with the agglomeration of pure TiO2, the TiO2 nanoparticles are well dispersed in the AC matrix, of which sizes are decreased with Fe ions doping. Additionally, the iron species on TiO2 of composite are Fe2O3 and FeO, which do not affect the crystalline structures of TiO2 nanoparticles. The AC matrix and iron doping content influence the fluorescence intensity of composite due to their effects on recombination probability of hole-electron pairs. Compared with TiO2, 0.3% Fe-TiO2, TiO2/AC, 0.5% Fe-TiO2/AC and 0.1% Fe-TiO2/AC, the 0.3% Fe-TiO2/AC shows the highest photoactivity with the complete mineralization of K2G for finite time due to the optimum Fe ions content and AC matrix. Furthermore, the kinetic constant (k = 0.0229 min−1) of 0.3% Fe-TiO2/AC composite is more than the sum of both TiO2/AC (0.0154 min−1) and 0.3% Fe-TiO2 (0.0057 min−1) because coexistence of the AC and Fe ions has an enlarging effect on improving the photoactivity of TiO2.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Jishou University, Jishou, 416000, China

    YouJi Li, Jing Li, MingYuan Ma, YuZhu Ouyang & WenBin Yan

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  1. YouJi Li
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  2. Jing Li
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  3. MingYuan Ma
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  4. YuZhu Ouyang
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  5. WenBin Yan
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Correspondence to YouJi Li.

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Supported by the Education Department Foundation of Hunan Province (Grant No. 08B063) and Science and Natural Science Foundation of Hunan Province (Grant No. 09JJ6101)

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Li, Y., Li, J., Ma, M. et al. Preparation of TiO2/activated carbon with Fe ions doping photocatalyst and its application to photocatalytic degradation of reactive brilliant red K2G. Sci. China Ser. B-Chem. 52, 1113–1119 (2009). https://doi.org/10.1007/s11426-009-0169-x

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