Cu-Based Metal-Organic Framework Nanoparticles for Sensing Cr(VI) Ions

被引：62

作者：

Shi, Wei ^{[1
]}

He, Mengqi ^{[1
]}

Li, Weitao ^{[1
]}

Wei, Xing ^{[1
]}

Bui, Brian ^{[2
]}

Chen, Mingli ^{[1
,3
]}

Chen, Wei ^{[2
]}

机构：

[1] Northeastern Univ, Coll Sci, Res Ctr Analyt Sci, Dept Chem, Shenyang 110819, Peoples R China

[2] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA

[3] Northeastern Univ, Analyt & Testing Ctr, Shenyang 110819, Peoples R China

来源：

ACS APPLIED NANO MATERIALS | 2021年 / 4卷 / 01期

基金：

中国国家自然科学基金;

关键词：

MOF-based nanozyme; oxidoreductase-like; Cr(VI); sensing; nanozyme probe; REDUCED GRAPHENE OXIDE; COLORIMETRIC DETECTION; PEROXIDASE; NANOZYME; REMOVAL; CAPTURE; MIMICS;

D O I：

10.1021/acsanm.0c03118

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A nanoscale MOF-199 was synthesized in a simple and fast way by mixing btc triethylammonium and copper nitrate solution at room temperature and characterized by scanning electron microscopy, transmission electron microscopy, Fouriertransform infrared spectroscopy, and X-ray diffraction. The mimicking enzyme activity and the steady-state kinetics of the nanozyme were investigated. The prepared MOF-199 was a uniformly nanosized octahedron, and it exhibited excellent Cr(VI)-activated oxidoreductase catalytic properties. MOF-199 was employed as a catalyst; in 5 min, 3,3',5,5'-tetramethylbenzidine (TMB) was oxidized by Cr(VI) into a bluish and oxidized TMB, which was recorded by UV-vis spectroscopy, and the mechanism was discussed. It facilitated the sensing of COO, and a linear range of 0.1-30 mu M was obtained with a limit of detection of 20 nM. The selectivity of the present method for Cr(VI) was excellent, and its application to environmental water samples was accomplished.

引用

页码：802 / 810

页数：9

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