tailieunhanh - Synthesis of PANi-TiO2 composite and preparation of Ti/PANi-TiO2 electrode for electrochemical study in brewery wastewater

It was found the lowest charge transfer resistance of Ω in the case of using 40 wt % TiO2. The SEM images explained that the composite existed in uniform fiber with diameter size of nano range. It was found the presence of TiO2 and PANi in material structure by X-ray diffraction and IR-spectra analysis, respectively. | Vietnam Journal of Chemistry, International Edition, 55(2): 158-162, 2017 DOI: Synthesis of PANi-TiO2 composite and preparation of Ti/PANi-TiO2 electrode for electrochemical study in brewery wastewater Nguyen The Duyen1,2,3, Mai Thi Xuan1, Mai Thi Thanh Thuy1, Nguyen Thi Van Anh1, Phan Thi Binh1,2* 1 Institute of Chemistry, Vietnam Academy of Science and Technology 2 Graduate University of Science and Technology, Vietnam Academy of Science and Technology 3 Faculty of Chemistry, Hanoi Pedagogical University No2 Received 6 December 2016; Accepted for publication 11 April 2017 Abstract PANi-TiO2 composites are successfully by synthesized by chemical method using TiO2 from 30 to 80 wt % to aniline during polymerization process for improving their material properties. Their conductivity was characterized by I-E curves among them the highest one ( mS/cm) reached by using 40 wt % TiO 2. Their paste form was made by using chitosan acetic acid solution as binder agent for preparing Ti/PANi-TiO2 electrode which measured in brewery wastewater by electrochemical impedance. It was found an electrical equivalent circuit with 6 elements including solution resistance Rs, capacitance Cf and resistance Rf of composite electrodes, adsorption capacitance Cad, charge transfer resistance R ct and Warburg diffusion element W. It was found the lowest charge transfer resistance of Ω in the case of using 40 wt % TiO2. The SEM images explained that the composite existed in uniform fiber with diameter size of nano range. It was found the presence of TiO2 and PANi in material structure by X-ray diffraction and IR-spectra analysis, respectively. Keywords. Ti/PANi-TiO2 electrode, impedance spectroscopy, substrate electrolyte. 1. INTRODUCTION Today, fossil fuels are becoming exhausted so the search for alternative energy sources is a matter of urgency. At the same time, environmental pollution problems are occurring with alarming levels. Microbial .