Journal
JOURNAL OF POROUS MATERIALS
Volume 29, Issue 6, Pages 1991-2001Publisher
SPRINGER
DOI: 10.1007/s10934-022-01313-2
Keywords
NiO; rGO; Hydrothermal; Supercapacitor; Glucose biosensing
Funding
- DST-SERB, Government of India [ECR/2017/002099]
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The NiO/rGO composites were synthesized using a hydrothermal method and characterized for their structural and morphological properties. The composites exhibited excellent electrochemical supercapacitor performance and glucose sensing properties, with high specific capacitance, sensitivity, stability, and detection limit.
The NiO/rGO composites are synthesized via a hydrothermal method followed by annealing treatment with varying graphene oxide concentrations. The structural and morphological characterizations of synthesized samples are done by XRD, FT-IR, Raman, and FE-SEM. The electrochemical supercapacitor performance of prepared electrodes is characterized by CV, GCD, and EIS studies. The NiO/rGO composite achieved the highest specific capacitance of 727.1 F g(-1) at 1 mA cm(-2) current density and showed good cyclic stability of about 80.4% over 9000 cycles. In a nonenzymatic glucose sensing study, the sensing properties are analyzed by CV and chronoamperometry. The NiO/rGO composite showed the highest glucose sensitivity of 442.4 mu A mM(-1) cm(-2) with correlation coefficient R-2 = 0.9964 and LOD of 7.42 mu M.
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