Copper oxide nanosheets as an effective nanozyme with haloperoxidase-like activity for the colorimetric detection of H2O2 and glucose

被引:2
|
作者
Singh, Renuka [1 ]
Kumari, Richa [2 ]
Tripathi, Chandra Shekhar Pati [2 ]
Guin, Debanjan [1 ]
机构
[1] Banaras Hindu Univ Varanasi, Inst Sci, Dept Chem, Varanasi 221005, Uttar Pradesh, India
[2] Banaras Hindu Univ Varanasi, Inst Sci, Dept Phys, Varanasi 221005, Uttar Pradesh, India
关键词
CuO nanosheets; Haloperoxidase activity; Glucose; Reactive chlorine species; PEROXIDASE-LIKE ACTIVITY; REDUCED GRAPHENE OXIDE; HYDROTHERMAL SYNTHESIS; CATALYTIC-ACTIVITY; CUO NANOPARTICLES; HYDROGEN-PEROXIDE; FENTON CHEMISTRY; NANORODS; HYBRIDS; NANOWIRES;
D O I
10.1016/j.saa.2024.124720
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
Copper oxide nanosheets (CuO NSs) have been successfully obtained by exploiting an effective one-step approach of sugar-blowing method followed by calcination. The nanosheets were characterized by several techniques like X-ray powder diffraction (XRD), Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). Impressively, CuO NSs display haloperoxidase (HPO) like catalytic activity which catalyses the oxidation of chloride ions by H 2 O 2 giving rise to reactive chlorine species (RCS). A sensitive and selective colorimetric sensor was then demonstrated via the oxidation of chromogenic substrate 3,3 ' ,5,5 ' - tetramethylbenzidine (TMB) by the novel nanoenzyme CuO NSs through the generation of RCS for H 2 O 2 and glucose detection with limit of detection of 109 nM and 21 nM in the linear ranges of 4.6 mu M to 769 mu M and 0.22 mu M to 19.57 mu M respectively. Additionally, the methodology is validated for the analysis of glucose in real samples.
引用
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页数:8
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