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Issue 58, 2019
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Molecular imprinting on PtPd nanoflowers for selective recognition and determination of hydrogen peroxide and glucose

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Abstract

PtPd nanoflowers (PtPd NFs) exhibit intrinsic peroxidase-like activity as nanozymes, but the nanozymes lack substrate specificity and have low catalytic activity. Herein, a molecularly imprinted nanogel on PtPd NFs was prepared by using 3,3′,5,5′-tetramethylbenzidine (TMB) as the template through the aqueous precipitation polymerization method. After the TMB was washed out, many substrate binding pockets were retained in the PtPd NFs. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and powder X-ray diffraction (XRD) were employed to characterize the molecularly imprinted polymer (MIP) PtPd nanoflowers (T-MIP-PtPd NFs). The obtained T-MIP-PtPd NFs exhibited enhanced catalytic activity and specific recognition for TMB. Compared with PtPd NFs, T-MIP-PtPd NFs showed a linear range from 0.01–5000 μM and a detection limit of 0.005 μM toward the detection of H2O2. Glucose can also be sensitively detected through cascade reaction by the T-MIP-PtPd NFs and glucose oxidase. Therefore, molecular imprinting on nanozymes technology shows promising application in biocatalysis and sensing fields.

Graphical abstract: Molecular imprinting on PtPd nanoflowers for selective recognition and determination of hydrogen peroxide and glucose

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Supplementary files

Article information


Submitted
23 Jul 2019
Accepted
02 Oct 2019
First published
21 Oct 2019

This article is Open Access

RSC Adv., 2019,9, 33678-33683
Article type
Paper

Molecular imprinting on PtPd nanoflowers for selective recognition and determination of hydrogen peroxide and glucose

C. Fan, J. Liu, H. Zhao, L. Li, M. Liu, J. Gao and L. Ma, RSC Adv., 2019, 9, 33678
DOI: 10.1039/C9RA05677G

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