期刊
MICROCHEMICAL JOURNAL
卷 160, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.microc.2020.105623
关键词
Zeolitic imidazolate framework-67; Co3O4; Cobalt copper carbonate hydroxide; Hierarchical nanostructures; Enzymeless glucose sensor
资金
- National Natural Science Foundation of China [61901186, 61904122]
- Special Innovation Projects of Universities in Guangdong Province [2019KTSCX178]
- Scientific Research Starting Foundation for Doctors of Huizhou University [2019JB006]
- Program for Innovative Research Team of Huizhou University (IRTHZU)
- Open Project Program of Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University [EFMD2020002Z]
An ultrasensitive electrochemical glucose sensor was developed by synthesizing in situ grown nanowires and cobalt oxide, with significantly improved electrochemical properties, wide linear range, and fast response-recovery time. The sensor also exhibits good reproducibility, long-term stability, and anti-bending property for glucose detection, making it a useful tool for enzymeless glucose monitoring in real serum samples.
An ultrasensitive electrochemical glucose sensor was developed by hydrothermal growth of cobalt copper carbonate hydroxide nanowires (CCCH NWs) on copper foam (CF) and surface in situ growth of zeolitic imidazolate framework-67 (ZIF-67) derived cobalt oxide (Co3O4) (Co3O4@CCCH NWs/CF). Benefitting from the large accessible surface area, the heterojunction between Co3O4 and CCCH NWs, as well as the high electrical conductivity of copper foam, the electrochemical properties of Co3O4@CCCH NWs/CF sensor were significantly improved. As demonstration, we achieved an ultra-high sensitivity of 16.01 mu A/mu M/cm(2), a wide linear range of 0.001 similar to 2.0 mM, and remarkable fast response-recovery times (1.5 s and 1.3 s) for emzymeless glucose detection based on the optimized sensor. Moreover, the fabricated Co3O4@CCCH NWs/CF sensor has a good reproducibility, a long-term stability and anti-bending property for glucose detection. More interestingly, this sensor can be used to determine the glucose level of real serum samples, thereby providing a useful tool for enzymeless glucose monitoring.
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