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Synthesis of MnO 2 /MWNTs Nanocomposites Using a Sonochemical Method and Application for Hydrazine Detection
Author(s) -
Wang Meifang,
Wang Cong,
Wang Guangfeng,
Zhang Wei,
Bin Fang
Publication year - 2010
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200900521
Subject(s) - nanocomposite , materials science , x ray photoelectron spectroscopy , cyclic voltammetry , detection limit , scanning electron microscope , electrode , hydrazine (antidepressant) , chemical engineering , composite number , electrochemistry , analytical chemistry (journal) , nanotechnology , composite material , chemistry , organic chemistry , engineering , chromatography
A sonochemical method has been successfully used to synthesize MnO 2 /MWNTs nanocomposites. The structure and nature of the resulting MnO 2 /MWNTs composite were characterized by scanning electron microscopy (SEM), energy‐dispersive X‐ray diffraction (EDX), X‐ray photoelectron spectroscopy (XPS).The results show that the sonochemically synthesized MnO 2 nanoparticles were homogeneously dispersed on the modified MWNT surfaces. The performance of the MnO 2 /MWNTs nanocomposites modified electrode was characterized using cyclic voltammetry (CV) and Nyquist plots. The electrode exhibits efficient electron transfer ability and high electrochemical response towards hydrazine. This may be attributed to the small particle size, high dispersion of MnO 2 particles. The fabricated hydrazine sensor showed a wide linear range of 5.0×10 −7 –1.0×10 −3 M with a response time less than 5 s and a detection limit of 0.2 μM. Taking the advantage of the unique properties of both MWNTs and MnO 2 , it would greatly broaden the applications of MWNTs and MnO 2 .