Gold Functionalised Attapulgite for Discrimination of Hydrogen Peroxide and Oxidising Ions

Overview

Journal IET Nanobiotechnol

Publisher Wiley

Specialty Biotechnology

Date 2017 May 7

PMID 28477004

Authors

Dan Zhu

Wenfeng Zhu

Weiwei Wang

Xiaoheng Liu

Affiliations

Soon will be listed here.

Abstract

Aiming to monitor hydrogen peroxide and oxidizing ions in aqueous circumstance, functionalized attapulgite [i.e. gold-modified attapulgite nanocomposites (Au/ATP NCs)] as peroxidase mimics were prepared by loading β-cysteamine-capped gold nanoparticles onto attapulgite with the use of electrostatic interactions. As-prepared Au/ATP NCs were used for the detection of HO. The linear range and detection limit for HO were determined by quantitative experiments emerging excellent stability and recyclability. The peroxidase-like activity of Au/ATP NCs could be expanded for the detection of some oxidative ions (Fe and Ag) was also been discovered. Based on the absorption spectrum and steady-state kinetics, the mechanism for peroxidase mimic reaction is investigated. This work represents the first example of multitarget detection for molecule and cations (HO, Fe and Ag) using Au/ATP NCs as peroxidase enzyme mimics and holds a promise for future biomedical and analytical applications.

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