β- AgVO3 Nanorods as Peroxidase Mimetic for Colorimetric Determination of Glucose.

Autor: Lu, Junyu, Wei, Lianqiang, Yao, Dongmei, Yin, Xiuju, Lai, Hongfang, Huang, Xiuxiang
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Zdroj: Journal of the Chinese Chemical Society; Jul2017, Vol. 64 Issue 7, p795-803, 9p
Abstrakt: β- AgVO3 nanorods have been demonstrated to exhibit intrinsic peroxidase-like activity. The oxidation of glucose can be catalyzed by glucose oxidase ( GO x) to generate H2O2 in the presence of O2. The β- AgVO3 nanorods can catalytically oxidize peroxidase substrates including o-phenylenediamine ( OPD), 3,3′,5,5′-tetramethylbenzidine ( TMB), and diammonium 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonate) ( ABTS) by H2O2 to produce typical color reactions: OPD from colorless to orange, TMB from colorless to blue, and ABTS from colorless to green. The catalyzed reaction by the β- AgVO3 nanorods was found to follow the characteristic Michaelis-Menten kinetics. Compared with horseradish peroxidase and AgVO3 nanobelts, β- AgVO3 nanorods showed a higher affinity for TMB with a lower Michaelis-Menten constant ( Km) value (0.04118 mM) at the optimal condition. Taking advantage of their high catalytic activity, the as-synthesized β- AgVO3 nanorods were utilized to develop a colorimetric sensor for the determination of glucose. The linear range for glucose was 1.25-60 μM with the lower detection limit of 0.5 μM. The simple and sensitive GO x-β- AgVO3 nanorods- TMB sensing system shows great promise for applications in the pharmaceutical, clinical, and biosensor detection of glucose. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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