Controlled chitosan coated Prussian blue nanoparticles with the mixture of graphene nanosheets and carbon nanoshperes as a redox mediator for the electrochemical oxidation of nitrite

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• 作者：Lin Cui  ; [Author Vitae] ; Jianying Zhu  ; [Author Vitae] ; Xiaomeng Meng  ; [Author Vitae] ; Huanshun Yin  ; [Author Vitae] ; Xiaoping Pan  ; [Author Vitae] ; Shiyun Ai ; ^{ashy@sdau.edu.cn} ; ^{chemashy@yahoo.com.cn}  ; [Author Vitae]
• 关键词：Chitosan ; Prussion blue ; Graphene nanosheets and carbon nanospheres mixture ; Electrochemical oxidation ; Nitrite
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2012
• 出版时间：3 January 2012
• 年：2012
• 卷：161
• 期：1
• 页码：641-647
• 全文大小：449 K

文摘

The graphene nanosheets and carbon nanospheres mixture (GNS-CNS) was prepared by electrolyzing graphite rob in KNO₃ solution under a constant current. The cationic chitosan (CS) coated Prussian blue (PB) as an efficient redox mediator could interact with the anion GNS-CNS via electrostatic interaction. The synergy effect of CS@PB nanoparticles and GNS-CNS contributed to the excellent electrochemical response towards the nitrite oxidation. The as-prepared CS@PB/GNS-CNS modified glass carbon (GC) electrode demonstrated its high sensitivity, low detection limit, short response time, and wide concentration range for the nitrite detection.