MnO2 nanorods grown NGNF nanocomposites for the application of highly sensitive and selective electrochemical detection of hydrogen peroxide

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 46; pp. 19 - 27
• Main Authors: Ramachandran, K., Zahoor, Awan, Raj Kumar, T., Nahm, Kee Suk, Balasubramani, A., Gnana Kumar, G.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.02.2017; 한국공업화학회
• Subjects: Active sites; Detection limit; Hydrothermal; Nanofibers; Sensitivity; 화학공학; Sensitivity; Active sites; Nanofibers; Hydrothermal; Detection limit
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2016.09.012

[Display omitted] •MnO2 rods anchored NGNFs were prepared by hydrothermal technique.•The growth mechanism of prepared composite is elucidated.•Synergetic interaction between MnO2 rods and NGNFs improved H2O2 detection.•Possible mechanism involved in the H2O2 detection at composite is provided.•NGNF/MnO2 exhibited a rapid amperometric response and low detection limit.•The sensor displayed good analytical reliability in human urine samples. The tetragonal α-phase structured manganese dioxide nanorods were densely grown over the nitrogen doped graphite nanofibers (NGNF/MnO2) via a facile and one-pot hydrothermal technique. The amperometric results depicted that NGNF/MnO2 composite exhibited a high sensitivity of 1096μAmM−1cm−2 and a wide linear range from 0.1 to 11mM with the lower detection limit of 1.25μM toward the non-enzymatic hydrogen peroxide (H2O2) detection, owing to the synergistic effects of NGNF and MnO2. In the prospect of excellent selectivity, real sample analysis and other striking advantages, the developed non-enzymatic sensors hold promising potential for the tight monitoring of H2O2 in the food and clinical diagnosis fields.