Hydroquinone colorimetric sensing based on platinum deposited on CdS nanorods as peroxidase mimics
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ORIGINAL PAPER
Hydroquinone colorimetric sensing based on platinum deposited on CdS nanorods as peroxidase mimics Xin Zhao 1 & Haoyuan Lyu 1 & Xiuxiu Yao 1 & Chang Xu 1 & Qingyun Liu 1
&
Zhenxue Liu 1 & Xianxi Zhang 2 & Xiao Zhang 3
Received: 6 February 2020 / Accepted: 12 July 2020 / Published online: 1 October 2020 # Springer-Verlag GmbH Austria, part of Springer Nature 2020
Abstract Pt deposited on CdS nanorods (Pt/CdS) have been prepared via the UV light photoreduction method. The Pt/CdS nanocomposites possess highly significant peroxidase-like activity with the assistance of the colorless substrate 3,3,5,5-tetramethylbenzidine (TMB). In the presence of peroxidase mimic Pt/CdS, TMB is quickly oxidized into a typical blue product (oxTMB, which has an obvious absorption at 652 nm) by H2O2 only in 3 min, which is easily detected visually. The catalytic activity of Pt/CdS originates from the accelerated electron transfer between the reactants. Combining the peroxidase-like activity of Pt/CdS with the blue change of TMB, a fast colorimetric sensing platform for detection of H2O2 has been constructed with a linear range 0.10– 1.00 mM and a detection limit of 45.5 μM. The platform developed is further used to detect hydroquinone (HQ) in the range1.0– 10 μM with a lower detection limit of 0.165 μM. The colorimetric platform has a potential to detect HQ residue in real water samples with recoveries ranging from 83.56 to 91.76%. Keywords Pt/CdS . Peroxidase . H2O2 . Colorimetric detection . Hydroquinone
Introduction Hydroquinone (HQ), as an important chemical intermediate and raw material, has been widely used in industrial production. Moreover, the isomer of HQ, catechol (CC), is also an important chemical raw material. HQ and its isomer often coexist in industrial sewage [1, 2]. According to the report,
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00604-020-04451-z) contains supplementary material, which is available to authorized users. * Qingyun Liu [email protected] 1
College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, People’s Republic of China
2
Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage & Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, People’s Republic of China
3
Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, People’s Republic of China
when the human body is exposed to acute high level of hydroquinone that will affect the central nervous system, resulting in tremor, convulsions, and death [3]. Therefore, it is of great practical significance to achieve the rapid and sensitive detection of HQ in water. Currently, the detection methods of HQ have been developed, including chromatography [4], colorimetry [5], and spectrophotometry [6]. Among them, the colorimetric method has
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