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RISS 인기검색어
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- 저자 : Vengadesh, Periasamy (검색결과 1 건)
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Babu, Kaliyamoorthy Justice,Zahoor, Awan,Nahm, Kee Suk,Aziz, Md. Abdul,Vengadesh, Periasamy,Kumar, Georgepeter Gnana The Royal Society of Chemistry 2016 NEW JOURNAL OF CHEMISTRY Vol.40 No.9
<P>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 mM, with a relatively low detection limit of 100 nM and a high sensitivity of 0.33 mA mM(-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.</P>
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