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- Title
Hydroquinone colorimetric sensing based on platinum deposited on CdS nanorods as peroxidase mimics.
- Authors
Zhao, Xin; Lyu, Haoyuan; Yao, Xiuxiu; Xu, Chang; Liu, Qingyun; Liu, Zhenxue; Zhang, Xianxi; Zhang, Xiao
- 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%.
- Subjects
PEROXIDASE; HYDROQUINONE; PLATINUM; CHARGE exchange; DETECTION limit; PLATINUM catalysts; NANOCOMPOSITE materials
- Publication
Microchimica Acta, 2020, Vol 187, Issue 10, p1
- ISSN
0026-3672
- Publication type
Article
- DOI
10.1007/s00604-020-04451-z