Ionic liquid-assisted: In situ growth of a cobalt oxide composite and its application in supercapacitors and electrochemical biosensors

Fajun Li, Chaohui Ruan, Yang Wang, Lixu Lei*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

Cobalt(ii,iii) oxide (Co3O4) nanorods/reduced graphene oxide (Co3O4 NR/RGO) composite has been successfully prepared via a reactable ionic liquid-assisted hydrothermal process and subsequent annealing. Here, the ionic liquid 1-hexadecyl-3-methylimid-azolium trifluoroacetate ([C16MIM]CF3COO) has been used as the template, co-solvent and reactant. Co3O4 NR/RGO can be used as the electrode material in supercapacitor applications and the non-enzymatic electrochemical detection of glucose. It has been found that the Co3O4 NR/RGO composite displays superior capacitive performance not only with high specific capacitance of 813.1 F g-1 at a current density of 1 A g-1, but also with excellent cycling stability. It can even detect glucose with a high sensitivity of 81.8 μA mM-1 and a remarkable low detection limit of 67 nM (S/N = 3).

Original languageEnglish
Pages (from-to)18659-18666
Number of pages8
JournalNew journal of chemistry
Volume42
Issue number23
DOIs
Publication statusPublished - 2018

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