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Research Article

Gold nanoparticle-decorated MoSe2 nanosheets as highly effective peroxidase-like nanozymes for total antioxidant capacity assay

Chengyi Hong1, Lingling Chen1, Jiayi Huang1, Yunling Shen1, Hongfen Yang3, Zhiyong Huang1, Ren Cai2( ), Weihong Tan2
College of Ocean Food and Biological Engineering, Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Jimei University, Xiamen 361021, China
Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology College of Material Science and Engineering, and Collaborative Research Center of Molecular Engineering for Theranostics, Hunan University, Changsha 410082, China
University of Texas at Austin, Austin, TX 78712, USA
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Abstract

A visual colorimetric detection strategy is reported for total antioxidant capacity (TAC) assay by using 3,3',5,5'-tetramethylbenzidine (TMB) oxidation as chromogenic substrate based on gold nanoparticle-decorated MoSe2 nanosheets (Au@MoSe2). Au@MoSe2 nanostructures exhibit high peroxidase-like activity and can catalyze H2O2 to oxidize TMB. Based on inhibition effect of ascorbic acid (AA) on TMB oxidation, a facile and sensitive colorimetric method was developed for AA detection. Under optimal conditions, the proposed method showed a sensitivity for AA in a concentration range from 2 to 120 μM and limit of detection was 0.41 μM. Furthermore, the method was employed for TAC assay in actual samples, including commercial beverages and vitamin C tablets. This work represents a model in nanostructure design and will lead to further development of TAC assay in evaluation of antioxidant food quality.

Graphical Abstract

We report a colorimetric method to evaluate the total antioxidant capacity (TAC) of antioxidant food based on gold nanoparticle-decorated MoSe2 nanosheets.

Keywords

nanozymesperoxidase mimicsAu@MoSe2 nanostructurestotal antioxidant capacity assay

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Nano Research
Volume 16 Issue 5,
May 2023
Pages 7180-7186
DOI: 10.1007/s12274-022-5328-9

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Cite this article:
Hong C, Chen L, Huang J, et al. Gold nanoparticle-decorated MoSe2 nanosheets as highly effective peroxidase-like nanozymes for total antioxidant capacity assay. Nano Research, 2023, 16(5): 7180-7186. https://doi.org/10.1007/s12274-022-5328-9
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Received: 12 September 2022
Revised: 03 November 2022
Accepted: 14 November 2022
Published: 29 December 2022
© Tsinghua University Press 2022