Highly selective colorimetric platinum nanoparticle-modified core-shell molybdenum disulfide/silica platform for selectively detecting hydroquinone

Xixi Zhu*, Yan Xue, Shutong Hou, Peng Song, Tao Wu, Hui Zhao, Nahid A. Osman, Abdullah K. Alanazi, Yan Gao, Hala M. Abo-Dief, Handong Li, Ben Bin Xu, Priyanka Wasnik, Qingyun Liu

*Corresponding author for this work

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6 Citations (Scopus)

Abstract

The one-step hydrothermal reduction method was used to create platinum nanoparticle (Pt NPs)-modified molybdenum disulfide (MoS2)-silica (SiO2) nanocomposites (Pt-MoS2/SiO2) with excellent peroxidase-like activity. Results of characterization revealed the successful synthesis of Pt-MoS2/SiO2 with the diameter being about 1 μm. Steady-state kinetic experiments indicated that the catalytic behavior of Pt-MoS2/SiO2 followed the Michaelis–Menten model of enzyme kinetics and had a good affinity with the substrates. The electron spin resonance (ESR) analysis results showed that hydrogen peroxide could be decomposed into hydroxyl radicals (·OH) and superoxide radicals (·O2) under the catalysis of Pt-MoS2/SiO2, and followed by oxidizing colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into a blue oxidation product (oxTMB). However, hydroquinone (HQ) could prevent TMB from oxidizing, and the amount of fade relied on the amount of HQ. This led to the development of a quick, sensitive, and accurate colorimetric sensing device for HQ, with a linear range of 0.5–9 μM and a limit of detection (LOD) as low as 0.242 μM. Furthermore, the satisfactory sensitivity and selectivity of HQ sensing platform in tap water and river water samples endowed it as a potential candidate in real applications. Graphical Abstract: A facile and efficient sensing platform for hydroquinone was established based on the peroxidase-like activity of platinum modified core–shell molybdenum disulfide/silica nanocomposites. [Figure not available: see fulltext.].

Original languageEnglish
Article number142
JournalAdvanced Composites and Hybrid Materials
Volume6
Issue number4
Early online date22 Jul 2023
DOIs
Publication statusPublished - 1 Aug 2023

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