期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 192, 期 -, 页码 578-585出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.11.030
关键词
Bi2S3 nanoparticles; Single-source precursor; X-ray crystallography; Electro-catalytic activity; Amperometric biosensor
Bi2S3 nanoparticles (NPs) are synthesized from a single source precursor complex Bi(ACDA)(3) (HACDA=2-aminocyclopentene-1-dithiocarboxylic acid) through a simple solvothermal decomposition process. The precursor complex is characterized by several spectroscopic techniques (FTIR, UV-vis spectroscopy) and finally the structure has been determined by single crystal X-ray diffraction study suggesting an unusual distorted pentagonal pyramidal geometry. The transmission electron microscopic (TEM) study ascertains the NPs to be of rod-like structure with a diameter of approximately 10-40nm and a wide range of edge lengths from 50nm to 300 nm. These NPs, immobilized on surface of a glassy carbon electrode (GCE), show high electron transfer ability and good electrochemical behavior and also exhibit electro-catalytic activity toward the reduction of hydrogen peroxide. As a result, this Bi2S3 NPs have been employed as a new H2O2 biosensor for amperometric estimation of H2O2 in a linear range from 10 to 5000 mu M. In addition to high stability, the present biosensor has good relative standard deviation (RSD =3.2%) and detection limit (DL of 2.5 mu M at 3 sigma). (C) 2013 Elsevier B.V. All rights reserved.
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