Nanolayers of carbon protected copper oxide nanocomposite for high performance energy storage and non-enzymatic glucose sensor

• Published in: Journal of alloys and compounds Vol. 875; p. 160063
• Main Authors: Vediyappan, Veeramani, Sivakumar, Mani, Chen, Shen-Ming, Lai, Qiwen, Madhu, Rajesh
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.09.2021; Elsevier BV
• Subjects: Capacitance; Carbon; Carbon shell-copper oxide nanorods; Chemical synthesis; Copper oxide nanorods; Copper oxides; Dopamine; Dopamine-derived carbon; Electrochemical analysis; Electrochemical studies; Electrode materials; Energy storage; Glucose; Glucose sensor; Nanocomposites; Nanorods; Nanostructured materials; Supercapacitor; Electrochemical studies; Supercapacitor; Carbon shell-copper oxide nanorods; Copper oxide nanorods; Glucose sensor; Dopamine-derived carbon
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2021.160063

•Nanolayers of carbon protected copper oxide (CuO-NC) were synthesized a simple chemical synthesis method and dopamine (DA) was used as carbon precursors.•The bifunctional CuO-NC materials provided a high specific capacitance of 247 F g−1 at a current density of 2.5 A g−1.•CuO-NC-GCE exhibit the glucose-sensing performance of excellent sensitivity value of 272.6 µA mM−1 cm−2 and low limit of detection (0.14 µM). [Display omitted] Nanolayers of carbon shell protected nanorods-like copper oxide (CuO-NC) material were prepared via a simple chemical synthesis method. A small molecule compound such as dopamine (DA) was used as carbon precursors. The prepared nanostructured materials were characterized by various techniques and used as bifunctional electrode materials for supercapacitor and non-enzymatic glucose bio-sensing. The electrochemical performance suggested that bifunctional CuO-NC materials provided a high specific capacitance of 247 F g−1 at a current density of 2.5 A g−1. Remarkably, the specific capacitance increased as a function of cycle numbers, and a maximum capacitance of 364 F g−1 was reached and sustained. Furthermore, the glucose-sensing performance was investigated and an excellent sensitivity value of 272.6 µA mM−1 cm−2 was achieved with a low limit of detection (0.14 µM). These excellent activities are mainly attributed to the presence of carbon shell, which acted as high active sites and enhanced electronic conductive paths for CuO-NC. The carbon shell also provided fast electron-transportation and effective protection of the nanorod structures under harsh redox condition, leading to excellent electrochemical activity.