TY - JOUR
T1 - Cu-Based Metal-Organic Framework Nanoparticles for Sensing Cr(VI) Ions
AU - Shi, Wei
AU - He, Mengqi
AU - Li, Weitao
AU - Wei, Xing
AU - Bui, Brian
AU - Chen, Mingli
AU - Chen, Wei
N1 - Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/1/22
Y1 - 2021/1/22
N2 - 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, Fourier-transform 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 Cr(VI), and a linear range of 0.1-30 μM 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.
AB - 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, Fourier-transform 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 Cr(VI), and a linear range of 0.1-30 μM 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.
KW - Cr(VI)
KW - MOF-based nanozyme
KW - nanozyme probe
KW - oxidoreductase-like
KW - sensing
UR - http://www.scopus.com/inward/record.url?scp=85099825139&partnerID=8YFLogxK
U2 - 10.1021/acsanm.0c03118
DO - 10.1021/acsanm.0c03118
M3 - Article
AN - SCOPUS:85099825139
SN - 2574-0970
VL - 4
SP - 802
EP - 810
JO - ACS Applied Nano Materials
JF - ACS Applied Nano Materials
IS - 1
ER -