A promising binary nanocomposite of zinc cobaltite intercalated with polyaniline for supercapacitor and hydrazine sensor

Omar, F.S. and Numan, A. and Duraisamy, N. and Bashir, S. and Ramesh, K. and Ramesh, S. (2017) A promising binary nanocomposite of zinc cobaltite intercalated with polyaniline for supercapacitor and hydrazine sensor. Journal of Alloys and Compounds, 716. pp. 96-105. ISSN 0925-8388, DOI https://doi.org/10.1016/j.jallcom.2017.05.039.

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Official URL: http://dx.doi.org/10.1016/j.jallcom.2017.05.039


Herein, zinc cobaltite (ZnCo2O4) nanoparticles (synthesized via hydrothermal treatment) were blended with polyaniline (PANI) (synthesized via chemical oxidative polymerization) to form PANI-ZnCo2O4 nanocomposite. The structural crystallinity and phase purity of PANI-ZnCo2O4 nanocomposite were authenticated by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) analysis. The morphological studies showed that the spinel structured ZnCo2O4 nanoparticles were well embedded on tubular-shaped PANI matrix, suggesting the effective connection between ZnCo2O4 nanoparticles with PANI matrix. The electrochemical performance studies of PANI-ZnCo2O4 nanocomposite for supercapacitor exhibited enhanced specific capacity of 398 C/g at a current density of 1 A/g as compared with ZnCo2O4 nanoparticles and PANI. The enhancement of electrochemical performance was contributed from the augmentation of electroactive sites for redox reaction, rapid electron transfer rate and the synergistic effect of ZnCo2O4 nanoparticles and highly conductive PANI. The fabricated PANI-ZnCo2O4//activated carbon based hybrid supercapacitor achieved high energy density (13.25 Wh/kg at 375 W/kg) as well as excellent cycling stability (∼90% retention after 3000 cycles). Furthermore, PANI-ZnCo2O4 nanocomposite was employed as a hydrazine sensor which exhibited good sensitivity of 0.43 μA μM−1 in the linear range of 0.1–0.6 mM with a low detection limit of 0.2 μM.

Item Type: Article
Funders: Fundamental Research Grant Scheme (FP012-2015A), from Ministry of Education, Malaysia, Postgraduate Research Grant (PPP) (PG034-2015A), UGC-Dr D.S. Kothari Postdoctoral Fellowship (Ref no. No.F.4-2/2006 (BSR)/EN/15-16/0031)
Uncontrolled Keywords: Nanostructured materials; Electrochemical reactions; Electrode materials; Oxide materials; Catalysis
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 04 Aug 2017 01:28
Last Modified: 04 Aug 2017 01:28
URI: http://eprints.um.edu.my/id/eprint/17614

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