Ultrafast and sensitive colorimetric detection of ascorbic acid with Pd-Pt core-shell nanostructure as peroxidase mimic
Ultrafast and sensitive colorimetric detection of ascorbic acid with Pd-Pt core-shell nanostructure as peroxidase mimic
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DOI：
10.1016/j.sintl.2020.100031
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Edwin Davidson;Zheng Xi;Zhuangqiang Gao;Xiaohu Xia
中科院分区：
文献类型：
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作者：
Edwin Davidson;Zheng Xi;Zhuangqiang Gao;Xiaohu Xia
近年来，具有过氧化物酶样性质的纳米结构（即过氧化物酶模拟物）由于其低成本、良好的稳定性和高催化活性而引起了人们的特别兴趣。在本文中，我们证明了使用Pd-Pt核-壳纳米立方体（NC）作为有效的过氧化物酶模拟物来实现抗坏血酸（AA，其通常被称为维生素C）的快速和灵敏的比色检测。利用AA的抗氧化性，Pd-Pt纳米粒子催化H2 O2氧化3，3 ′，5，5 ′-四甲基联苯胺（TMB）产生的显色信号被AA淬灭。方法的检出限为0.40 μM，线性范围为0-15 μM，线性关系良好。据我们所知，在这项工作中报道的方法提出了最快的AA检测所有其他报道的比色方法，只有3分钟的反应时间。该方法具有操作简单、成本低、室温条件下稳定性好等特点。
In recent years, nanostructures with peroxidase-like properties (i.e.peroxidase mimics) have attracted special interest due to their low costs, decent stabilities, and high catalytic activities. Herein, we demonstrate the use of Pd-Pt core-shell nanocubes (NCs) as efficient peroxidase mimics to achieve rapid and sensitive colorimetric detection of ascorbic acid (AA, which is commonly known as vitamin C). The color signal generated by the Pd-Pt NCs catalyzed oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) by H2O2is quenched in presence of AA based on its antioxidant property. This colorimetric method attains a detection limit of 0.40 μM and a linear range of 0–15 μM, with good linearity. To the best of our knowledge, the method reported in this work presents the fastest AA detection among all the other reported colorimetric methods, with only a 3-min reaction time. Furthermore, this method features a simple procedure, cost-effectiveness, room temperature conditions and good stability.