Polyoxometalate functionalizing CeO2 hollow nanospheres as enhanced oxidase mimics for ascorbic acid colorimetric sensing

Zhou, Tao; Zhang, Tonglei; Wang, Yan; Ge, Danhua; Chen, Xiaojun

doi:10.1016/j.saa.2022.122219

Cited by 13 publications

(2 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the past decades, various reported nanozymes have been considered promising alternatives for natural enzymes because they have effectively solved the inherent defect of poor stability and high cost. − Different nanomaterials including cobalt–nitrogen–carbon, Co 3 S 4 nanosheets, MnCo 2 O 4 nanofibers, MoS 2 -polypyrrole (PPy)-Pd nanotubes, and perovskite LaMnO 3+∂ nanofibers have been developed to detect l -Cys. − In comparison with peroxidase mimics, the colorimetric sensing process based on oxidase mimics could avoid additional issues for bioassays in the absence of H 2 O 2 . Noble metal nanoparticles (NMNs) have shown oxidase-like properties, and NMNs are easy to combine with oxygen (such as the Au–O bond and Pt–O bond) to promote the dissociation of O 2 based on the d-band theory, thus catalyzing the production of ROS .…”

Section: Introductionmentioning

confidence: 99%

Synergistically Enhanced Oxidase-like Property of Core–Shell MOF Nanozymes by Decorating Au and Ag/AgCl Nanoparticles for l-Cysteine Colorimetric Sensing

Li,

Chen,

Zhou

et al. 2023

Langmuir

Self Cite

View full text Add to dashboard Cite

Monitoring L-cysteine (L-Cys) is of importance for human health and food safety. Herein, we designed a novel strategy for bimetallic Au and Ag/AgCl anchoring on Ni-doped ZIF-67 to form core−shell nanocubes (Ni-ZIF-67/AuAg/AgCl) using the galvanic replacement processes. The unique properties of ZIF-67 nanocubes were conducive to generating strong synergistic catalytic effects with Au and Ag/AgCl, particularly when Ni-ZIF-67/AuAg/AgCl composites were employed as oxidase mimics for catalyzing the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB). The Ni-ZIF-67/AuAg/AgCl composites displayed strong affinity toward TMB, displaying a lower Michaelis constant K m value of 0.25 mM and a higher maximum initial rate V max of 9 × 10 −8 M s −1 . By virtue of the nanozyme, the colorimetric sensor was constructed for L-Cys detection with a relatively low detection limit of 0.051 μM. The superior catalytic performance of the as-prepared Ni-ZIF-67/AuAg/AgCl composites can be ascribed to the core−shell structure, large specific surface area, and strong synergistic catalytic effects, which are beneficial for exposing more active sites and enhancing the conductivity to further boost their catalytic activity.

show abstract

Section: Introductionmentioning

confidence: 99%

Synergistically Enhanced Oxidase-like Property of Core–Shell MOF Nanozymes by Decorating Au and Ag/AgCl Nanoparticles for l-Cysteine Colorimetric Sensing

Li,

Chen,

Zhou

et al. 2023

Langmuir

Self Cite

View full text Add to dashboard Cite

show abstract

“…Exogenous sources of AA depend on the diet, including beverages, foods, and medications. Studies have shown that lack and excessive intake of AA were both harmful to body health( Xu et al, 2021 ; Zhou et al, 2023 ). Therefore, the accurate determination of AA was of great significance in the clinical, pharmaceutical, and food fields.…”

Section: Introductionmentioning

confidence: 99%

Rapid and sensitive determination of ascorbic acid based on label-free silver triangular nanoplates

Qiao

Liu

Fan

et al. 2023

Current Research in Food Science

View full text Add to dashboard Cite

A Ratiometric Fluorescence Assay for Detection of Ascorbic Acid Based on N,S Co‐Doped Carbon Dots Combined With Ce⁴⁺

Hu,

Wang,

et al. 2024

Luminescence

View full text Add to dashboard Cite

Hence, N,S‐CDs with photoluminescent property were simply synthesized via a one‐step hydrothermal method. Combined with the commercial reagent Ce4+, a ratiometric fluorescence assay for ascorbic acid (AA) detection was established. Ce4+, possessing oxidization, could directly oxidize o‐phenylenediamine (OPD) to form the yellow fluorescent product oxOPD. Under the excitation wavelength of 370 nm, oxOPD had a maximum fluorescence emission at 562 nm. Meanwhile, due to the occurrence of the inner filter effect (IFE), oxOPD quenched the fluorescence of N,S‐CDs. However, ascorbic acid (AA) inhibited the oxidation of Ce4+, causing the fluorescence of oxOPD at 562 nm to decrease, accompanied by an increase in the fluorescence belonging to N,S‐CDs at 450 nm. Thus, a Ce4+‐assisted ratiometric fluorescence method was established for AA detection. The two fluorescence output signals in this method had opposite changing trends, which could reduce system errors and improve the accuracy. This method was successfully applied to the determination of AA in drugs and fruits.

show abstract

Polyoxometalate functionalizing CeO2 hollow nanospheres as enhanced oxidase mimics for ascorbic acid colorimetric sensing

Cited by 13 publications

References 37 publications

Synergistically Enhanced Oxidase-like Property of Core–Shell MOF Nanozymes by Decorating Au and Ag/AgCl Nanoparticles for l-Cysteine Colorimetric Sensing

Synergistically Enhanced Oxidase-like Property of Core–Shell MOF Nanozymes by Decorating Au and Ag/AgCl Nanoparticles for l-Cysteine Colorimetric Sensing

Rapid and sensitive determination of ascorbic acid based on label-free silver triangular nanoplates

A Ratiometric Fluorescence Assay for Detection of Ascorbic Acid Based on N,S Co‐Doped Carbon Dots Combined With Ce⁴⁺

Contact Info

Product

Resources

About

Polyoxometalate functionalizing CeO2 hollow nanospheres as enhanced oxidase mimics for ascorbic acid colorimetric sensing

Cited by 13 publications

References 37 publications

Synergistically Enhanced Oxidase-like Property of Core–Shell MOF Nanozymes by Decorating Au and Ag/AgCl Nanoparticles for l-Cysteine Colorimetric Sensing

Synergistically Enhanced Oxidase-like Property of Core–Shell MOF Nanozymes by Decorating Au and Ag/AgCl Nanoparticles for l-Cysteine Colorimetric Sensing

Rapid and sensitive determination of ascorbic acid based on label-free silver triangular nanoplates

A Ratiometric Fluorescence Assay for Detection of Ascorbic Acid Based on N,S Co‐Doped Carbon Dots Combined With Ce4+

Contact Info

Product

Resources

About

A Ratiometric Fluorescence Assay for Detection of Ascorbic Acid Based on N,S Co‐Doped Carbon Dots Combined With Ce⁴⁺