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%. Graphical abstract Graphical abstract

中文翻译：

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基于沉积在硫化镉纳米棒上的铂作为过氧化物酶模拟物的对苯二酚比色传感

沉积在 CdS 纳米棒上的 Pt (Pt/CdS) 已通过紫外光光还原方法制备。在无色底物 3,3,5,5-四甲基联苯胺 (TMB) 的帮助下，Pt/CdS 纳米复合材料具有非常显着的类过氧化物酶活性。在过氧化物酶模拟物 Pt/CdS 的存在下，TMB 仅在 3 分钟内被 H2O2 快速氧化成典型的蓝色产物（oxTMB，在 652 nm 处有明显吸收），这很容易被肉眼检测到。Pt/CdS 的催化活性源于反应物之间加速的电子转移。将 Pt/CdS 的类过氧化物酶活性与 TMB 的蓝色变化相结合，构建了一个用于检测 H2O2 的快速比色传感平台，线性范围为 0.10-1.00 mM，检测限为 45.5 μM。开发的平台进一步用于检测范围为 1.0-10 μM 的对苯二酚 (HQ)，检测下限为 0.165 μM。比色平台有可能检测实际水样中的 HQ 残留物，回收率范围为 83.56% 至 91.76%。图形摘要图形摘要