期刊
ACS APPLIED NANO MATERIALS
卷 4, 期 4, 页码 4026-4036出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c00379
关键词
ZnFe2O4; spinel; electrochemical detection; heavy metal ions; glucose
资金
- Natural Science Foundation of China [51962032, 61704114, 51764049]
- Youth Innovative Talents Cultivation Fund, Shihezi University [KX01480109]
- Opening Project of the Research Center for Material Chemical Engineering Technology of Xinjiang Bingtuan [2017BTRC007]
ZnFe2O4 spinel magnetic nanoparticles were successfully synthesized and utilized in electrochemical trace detection of Hg(II), Pb(II), Cu(II), and glucose. The modified electrodes showed excellent performance in terms of sensitivity, stability, and repeatability for heavy metal ions and nonenzymatic glucose detection.
ZnFe2O4 (ZFO) spinel magnetic nanoparticles with a small particle size (11.2 nm) and large specific surface area (54.1 m(2)/g) are synthesized by a one-step hydrothermal method without the calcination process. ZFO-modified electrodes are first utilized for the simultaneous electrochemical trace detection of Hg(II), Pb(II), and Cu(II), which show an outstanding linear response for Hg(II), Pb(II), and Cu(II), and the limit of detection (LOD) is 1.61, 7.38, and 12.03 nM, respectively. Meanwhile, ZFO-modified electrodes exhibit excellent repeatability [relative standard deviation (RSD) of 0.785%], reproducibility (RSD of 0.896%), stability (RSD of 3.240%), and anti-interference analysis, which is successfully applied to the real water environment. Moreover, the ZFO-modified electrode also exhibits a high sensitivity of 1160 mu A mM(-1) cm(-2) and LOD of 0.8 mu M for glucose. These results indicate that ZFO nanoparticles as a promising modified electrode material will be potentially applied in the field of electrochemical sensors for heavy metal ions and nonenzymatic glucose.
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