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자료유형
학술저널
저자정보
Jinbao Luo (Hefei University of Technology) Jiewu Cui (Hefei University of Technology) Yan Wang (Hefei University of Technology) Dongbo Yu (Hefei University of Technology) Yongqiang Qin (Hefei University of Technology) Hongmei Zheng (Hefei University of Technology) Yu Hong (Hefei University of Technology) Yong Zhang (Hefei University of Technology) Yucheng Wu (Hefei University of Technology)
저널정보
성균관대학교 성균나노과학기술원 NANO NANO Vol.13 No.7
발행연도
2018.1
수록면
140 - 150 (11page)

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Selectivity is significant to the practical applications of electrochemical biosensors in clinical and diagnostic field. In this paper, porous CeO2-x/C nanorods (NRs) derived from Ce-based metal organic framework (MOF) were synthesized and employed as substrate to construct uric acid biosensors with high sensitivity and selectivity at low working potential. The morphology, microstructures and elemental states of as-prepared samples were investigated by SEM, XRD, TEM and XPS systematically. It was found that a great amount of oxygen vacancies was introduced into the interstitial of CeO2 and nonstoichiometric CeO2/C (CeO2-x/C) nanorods based on Ce-MOF were formed under calcination in Ar atmosphere. The increased oxygen vacancies enabled the negatively shifting of the working potential towards H2O2 detection for CeO2-x/C nanorods, favoring the construction of biosensors based on the detection of H2O2. Uric biosensors based on CeO2-x/C NRs exhibited a high sensitivity of 220.0 μA · cm -2 · mM -1 and a linear range from 50 μM to 1000 μM at working potential of -0.4 V versus SCE. It also exhibited superior selectivity toward interferents coexisting with uric acid in urine due to the low working potential.

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