Facile and fast fabrication of polyaniline nanorods on acidized titanium foils with a synergistic effect for electrochemical sensing

Lei Zhang; Honglian Cai; Cuisong Zhou; Congmin Wang; Yuyin Long; Xiaoqin Li; Dan Xiao

doi:10.1039/c5tb00794a

Facile and fast fabrication of polyaniline nanorods on acidized titanium foils with a synergistic effect for electrochemical sensing

J Mater Chem B. 2015 Nov 28;3(44):8629-8637. doi: 10.1039/c5tb00794a. Epub 2015 Oct 6.

Authors

Lei Zhang¹, Honglian Cai, Cuisong Zhou, Congmin Wang, Yuyin Long, Xiaoqin Li, Dan Xiao

Affiliation

¹ College of Chemistry, Key Laboratory of Green Chemistry and Technology, Ministry of Education, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, China. zcs@scu.edu.cn.

PMID: 32262719
DOI: 10.1039/c5tb00794a

Abstract

A facile method to quickly construct polyaniline nanorods (PANI-NR) on acidized titanium (Ti) foils was reported. In this strategy, the acidized Ti foils (Ti-ac) can act as nucleation sites for controllable growth of PANI-NR. Attributed to the synergistic effect of the PANI-NR, doped CNTs and Ti-ac, the PANI-NR/CNT/Ti-ac composite exhibited decreased redox potential and improved electron transport capability. PANI-NR/CNT/Ti-ac was used as an excellent platform for electrochemically sensing ascorbic acid (AA). At a low AA concentration range from 0.4 μM to 125 μM (R² = 0.998), a high sensitivity of 281 μA mM^-1 cm^-2 was obtained. The detection limit of AA was 80 nM at a signal-to-noise ratio of 3, which was better than that of reported PANI microtubes (280 nM), PANI nanoparticles (8.3 μM) and PANI film/PAA/MWCNTs (250 nM). A strategy for fabricating the PANI-NR/CNT composite on Ti-ac was provided and the improved electrochemical performance suggests promising application of PANI-NR/CNT/Ti-ac as a sensing platform.