期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 810, 期 -, 页码 95-99出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2017.12.077
关键词
Modified electrode; Perovskite material; SrTiO3 nanopartides; Direct electrochemistry; Biosensor
资金
- National Natural Science Foundation of China [21475116, 21575125, 21575124]
- Qinglan Project of Jiangsu Province
- Yangzhou University
- Priority Academic Program Development of Jiangsu Higher Education Institution (PAPD)
- Six Talent Peaks Project of Jiangsu Province
- University Natural Science Foundation of Jiangsu Province [16KJD150003]
In this work, SrTiO3 nanoparticles (SrTiO(3)NPs), a novel and effective perovskite-type material, are synthesized to modify electrode for the development of sensitive enzymatic electrochemical biosensor applications. The electrochemical behavior of glucose oxidase (GOx) immobilized on SrTiO(3)NPs-modified glassy carbon electrode is investigated. Scanning electron microscopy and cyclic voltammetry are used to characterize the morphology and assay property of different modified electrodes. Results illustrate that SrTiO(3)NPs possess large surface area and apparently enhance the direct electron transfer between GOx and modified electrode. The SrTiO(3)NPs-based enzyme biosensor shows a high sensitivity of 15.6 mA.(-1).cm(-2), wide linear range from 0.01 mM to 1.2 mM, and a low detection limit of 3 mu m (S/N = 3). Furthermore, the resultant glucose biosensor has excellent selectivity, acceptable repeatability, practicality and stability. The perovskite SrTiO(3)NPs provide a very attractive and potential electrode material to develop electrochemical biosensors.
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