The results showed that their photoelectrochemical property with light on in M H2SO4 indicating a n-conductor that depended on PANi thickness covered TiO2-layer among them the best one obtained by oxidative temperature of 500 oC for 30 minutes during thermal treatment of titanium substrate connected with an immersing into acidic aniline solution for only 8 min during polymerization. | Vietnam Journal of Chemistry, International Edition, 54(6): 771-775, 2016 DOI: Preparation of Ti/TiO2-PANi electrodes by combining method of thermal treatment with polymerization processing and their electrochemical property Mai Thi Xuan1, Nguyen The Duyen2, Pham Thi Tot1, Mai Thị Thanh Thuy1, Nguyen Thi Van Anh1, Phan Thi Binh1* 1 Institute of Chemistry, Vietnam Academy of Science and Technology 2 Faculty of Chemistry, Hanoi Pedagogical University No2 Received 8 August 2016; Accepted for publication 19 December 2016 Abstract Ti/TiO2-PANi-electrodes were synthesized by combining method of thermal treatment of titanium substrate with chemical polymerization processing of aniline on which. Their morphological structure was observed by scanning electron microscopy. The presence of PANi and TiO2 were indicated by infrared spectra and X-ray diffraction, respectively. Their electrochemical properties were characterized by cyclic voltammetry and impedance spectroscopy. The results showed that their photoelectrochemical property with light on in M H2SO4 indicating a n-conductor that depended on PANi thickness covered TiO2-layer among them the best one obtained by oxidative temperature of 500 oC for 30 minutes during thermal treatment of titanium substrate connected with an immersing into acidic aniline solution for only 8 min during polymerization. Keywords. TiO2-PANi composite, cyclic voltammetry, impedance spectroscopy, combining method. 1. INTRODUCTION 2. EXPERIMENTAL Polyaniline (PANi) is a typical conductive polymer because of its optoelectrical, electrical and optical properties as well as energy storage and conversion [1-3]. It is widely applied to fabricate sensors [4], solar cell [5] and microbial fuel cell [6] due to its good environmental stability and easy synthesis. TiO2 is a known semi-conductive oxide metal with chemical and physical stability, photocatalytic and photoelectrochemical properties for application to dye
