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The influence of the acidic scouring treatment on the wastewater treatment of TiO2 loaded activated carbon electrode

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Abstract

Activated carbon (AC) electrodes were loaded with TiO2 by using sol–gel method after a pretreatment process, the effect of the acidic pretreatment of the TiO2 loaded electrode on its deionization efficiency of the wastewater containing NaCl solutions was studied; the physical, chemical and electrochemical properties of the electrode were characterized. The physical and chemical properties of the activated carbon before and after loaded with TiO2 nanoparticles are characterized by using scanning electron microscopy, energy dispersion spectrum analyzer, Brunauer–Emmett–Teller gas adsorption method, thermal gravimetric analysis, Fourier transform infrared spectroscopy respectively . Electrochemical properties were characterized by employing electrochemical workstation and electrical adsorption deionization test. It was found that both the specific capacitance and the ions removal efficiency of the activated carbon loaded with TiO2 had an increase of 16.4 and 49.8 % respectively in comparison with original activated carbon electrode. It was believed that this is due to the presence of crystal anatase TiO2 nanoparticles (the mass content of titanium element in the TiO2/AC complex is about 24.91 %) on the surface and pores in the activated carbon; while Ti–O–C bonds was found on the surface of the activated carbon, its surface wetting properties was significantly improved. However, it was also noticed that and the specific surface area of the activated carbon was decreased from 680.5 to 523.35 m2 g−1. This might lead to the decrease of the physical adsorption properties of the activated carbon electrodes, but its Electrical double-layer capacitance increases, electrical adsorption efficiency was improved.

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Authors and Affiliations

  1. College of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an, 710048, China

    Hai-hong Li, Jie Yang, Chao Zhang, Hong-yan Li & Pan-pan Pei

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  1. Hai-hong Li
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  2. Jie Yang
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  3. Chao Zhang
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  4. Hong-yan Li
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  5. Pan-pan Pei
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Correspondence to Jie Yang.

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Li, Hh., Yang, J., Zhang, C. et al. The influence of the acidic scouring treatment on the wastewater treatment of TiO2 loaded activated carbon electrode. J Porous Mater 22, 887–895 (2015). https://doi.org/10.1007/s10934-015-9962-4

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