Issue 41, 2015

Pd nanoparticles supported on nitrogen, sulfur-doped three-dimensional hierarchical nanostructures as peroxidase-like catalysts for colorimetric detection of xanthine

Abstract

Pd nanoparticles supported on nitrogen, sulfur-doped three-dimensional hierarchical nanostructures (Pd/N-S-CS) were successfully prepared by glycol reduction of Pd on nitrogen, sulfur-doped three-dimensional hierarchical nanostructures (N-S-CS) using humic acid (HA) and thiourea as the precursors. Transmission electron microscopy (TEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) were employed to confirm the characterization of Pd/N-S-CS. The results showed that the obtained Pd/N-S-CS had interesting three-dimensional hierarchical nanostructures which were composed of nanosheets, and Pd nanoparticles with an average diameter of 6 nm were distributed on the surface of the nanosheets. Furthermore, the Pd/N-S-CS exhibited excellent peroxidase-like activity and it can effectively catalyze the classical peroxidase substrate 3,3′,5,5′-tetramethylbenzidine (TMB) by H2O2 to produce a color reaction. Based on this finding, a simple, sensitive, and selective colorimetric method for H2O2 and xanthine detection was developed and applied to detect xanthine in urine samples. The detection limit of H2O2 and xanthine were 3.3 × 10−6 M and 2.9 × 10−7 M, respectively. This work is expected to provide a novel and efficient method for the detection of xanthine in the human body.

Graphical abstract: Pd nanoparticles supported on nitrogen, sulfur-doped three-dimensional hierarchical nanostructures as peroxidase-like catalysts for colorimetric detection of xanthine

Article information

Article type
Paper
Submitted
06 Feb 2015
Accepted
30 Mar 2015
First published
31 Mar 2015

RSC Adv., 2015,5, 32183-32190

Pd nanoparticles supported on nitrogen, sulfur-doped three-dimensional hierarchical nanostructures as peroxidase-like catalysts for colorimetric detection of xanthine

W. Shi, H. Fan, S. Ai and L. Zhu, RSC Adv., 2015, 5, 32183 DOI: 10.1039/C5RA02312B

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