Single source precursor approach to the synthesis of Bi₂S₃ nanoparticles: A new amperometric hydrogen peroxide biosensor

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• 作者：Amit Kumar Dutta ; Swarup Kumar Maji ; Kamala Mitra ; Arpita Sarkar ; Namrata Saha ; Abhisek Brata Ghosh ; Bibhutosh Adhikary
• 关键词：Bi2S3 nanoparticles ; Single-source precursor ; X-ray crystallography ; Electro-catalytic activity ; Amperometric biosensor
• 刊名：Sensors and Actuators B: Chemical
• 出版年：1 March, 2014
• 年：2014
• 卷：192
• 期：Complete
• 页码：578-585
• 全文大小：1797 K

文摘

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 10-40 nm and a wide range of edge lengths from 50 nm 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 渭M. In addition to high stability, the present biosensor has good relative standard deviation (RSD = 3.2%) and detection limit (DL of 2.5 渭M at 3蟽).