CuCo-Cu@CoCH stamen-like nanoarray prepared by co-reduction for electrochemical detection of hydrogen peroxide

被引:23
作者
Han, Ning [1 ]
Hu, Shiyu [1 ]
Zhang, Liying [1 ]
Yi, Shasha [1 ]
Zhang, Zongtao [1 ]
Wang, Yu [1 ]
Zhou, Ying [1 ]
Chen, Deliang [1 ]
Gao, Yanfeng [2 ]
机构
[1] Zhengzhou Univ, Sch Mat Sci & Engn, 100 Sci Ave, Zhengzhou 450100, Henan, Peoples R China
[2] Shanghai Univ, Sch Mat Sci & Engn, 333 Nanchen Rd, Shanghai 200444, Peoples R China
基金
中国国家自然科学基金;
关键词
Electrochemical sensor; Electroanalysis; Hydrogen peroxide; Co-reduction; Nanoarray; METAL-ORGANIC FRAMEWORK; GRAPHENE OXIDE; AMMONIA BORANE; NANOPARTICLES; SENSOR; GLUCOSE; ALLOY; HYDROLYSIS; ELECTRODE; NANOWIRES;
D O I
10.1016/j.apsusc.2021.151879
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Accurate and convenient detection of H2O2 is of great significance for the diagnosis and treatment to some diseases. Herein, a unique stamen-like CuCo-Cu@Co(CO3)(0.5)(OH) (defined as CuCo-Cu@CoCH) nanoarray was fabricated by cation exchange and co-reduction for electrochemical detection of H2O2. The nanostructure with large electrochemical surface area can adsorb H2O2 efficiently, while the Cu@CoCH nanowire offers a high-way for electron transfer, and the CuCo nanoparticle possesses high activity for H2O2 reduction. Hence, the CuCo-Cu@CoCH nanoarray performs excellently as a electrochemical H2O2 sensor with a high sensitivity of 3570 mM(-1) cm(-2) (1 mu M to 100 mu M) and 3290 mu A mM(-1) cm(-2) (100 mu M to 2000 mu M), a fast response time (< 1.5 s), a low detection limit (0.97 mu M, S/N = 3) and superior selectivity, stability. Furthermore, the nanoarray shows promising electrochemical activity for real-time detection of H2O2 released from HepG2 human liver cancer cells. This work offers a novel material as electrochemical sensor to H2O2 with enhanced performance, and shows a new solution to prepare nanostructure of alloy.
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页数:9
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