Manganese dioxide-vulcan carbon@silver nanocomposites for the application of highly sensitive and selective hydrazine sensors

Babu, K.J. and Zahoor, A. and Nahm, K.S. and Aziz, M.A. and Periasamy, V. and Kumar, G.G. (2016) Manganese dioxide-vulcan carbon@silver nanocomposites for the application of highly sensitive and selective hydrazine sensors. New Journal of Chemistry, 40 (9). pp. 7711-7720. ISSN 1144-0546, DOI

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Manganese dioxide (MnO2)-vulcan carbon (VC)@silver (Ag) (core@shell) nanocomposites were synthesized through a simple wet chemical method without using hazardous organic reagents, polymeric micelles, templates or catalysts. The synthesized MnO2-VC@Ag exhibited a MnO2-VC core and Ag shell, and the thickness of shell was found to be 23 nm. The obtained diffraction patterns confirmed that the prepared nanocomposite consists of tetragonal and face-centred cubic structures of MnO2 and Ag nanostructures, respectively. Cyclic voltammetry and amperometric techniques were adopted to electrochemically characterize the MnO2-VC@Ag nanospheres for hydrazine oxidation in phosphate buffer solution. Under the optimized conditions, the fabricated sensor exhibited a good electrochemical performance toward hydrazine oxidation, offering a broad linearity of 0.1 to 350 μM, with a relatively low detection limit of 100 nM and a high sensitivity of 0.33 μA μM-1 cm-2. In addition, anti-interference properties, good reproducibility, long term performance, good repeatability and real sample analysis were achieved for the constructed sensor, owing to the synergetic effects of the Ag and MnO2-VC nanostructures. The aforesaid attractive analytical performance and facile preparation of the MnO2-VC@Ag core-shell nanospheres are new features for electrocatalytic materials and may hold promise for the design and development of effective hydrazine sensors.

Item Type: Article
Funders: University Grants Commission (UGC), New Delhi, India major Project Grant No. MRP-MAJOR-CHEM-2013-36681, Korea Government Ministry of Trade, Industry and Energy: Human Resources Development program (No. 20114030200060) of the Korea Institute of Technology Evaluation and Planning (KETEP)
Uncontrolled Keywords: Carbon; Hydrazine; Manganese dioxide; Nanoshell; Phosphate buffered saline; Silver nanoparticle; Unclassified drug; Vulcan carbon
Subjects: Q Science > QC Physics
T Technology > TP Chemical technology
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 04 Dec 2017 06:33
Last Modified: 04 Dec 2017 06:33

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