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Analytical applications of silica-modified electrodes - A comprehensive review [Review]

机译：二氧化硅改性电极的分析应用-综述[综述]

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摘要

This article aims to review the electroanalytical applications of chemically modified electrodes involving silica and silica-containing matrices. After a brief introduction to silica chemistry, the implication of pure and grafted silicas in electrochemistry, as well as that of the silica-based materials originating from the sol-gel technology, will be discussed. The interest of silica-modified electrodes (SiO2-MEs) with respect to electroanalysis will be pointed out by means of several examples. In the last five years, successful applications of SiO2-MEs have been achieved. Among them, silica grafted with inorganic films or organic moieties was successfully applied to the selective preconcentration or the electrocatalytic detection of various analytes. Also, the ability of the sol-gel chemistry to encapsulate enzymes within a silica matrix without preventing its activity was exploited in the development of new amperometric biosensors. These promising fields are thought to lead to significant advances in the near future, because of the explosive growth in both the synthesis of novel mesoporous organically-modified silica-based materials and the huge development of sol-gel chemistry in tailoring and construction of new modified electrodes. [References: 307]
机译：本文旨在回顾涉及二氧化硅和含二氧化硅基质的化学修饰电极的电分析应用。在简要介绍了二氧化硅化学之后，将讨论纯二氧化硅和接枝二氧化硅在电化学中的意义，以及源自溶胶凝胶技术的二氧化硅基材料的意义。二氧化硅改性电极（SiO 2 -ME）相对于电分析的兴趣将通过几个例子指出。在过去的五年中，SiO2-ME已成功应用。其中，接枝有无机膜或有机部分的二氧化硅已成功地用于各种化合物的选择性预富集或电催化检测。同样，在新的安培生物传感器的开发中，利用了溶胶-凝胶化学将酶包封在二氧化硅基质内而不阻止其活性的能力。人们认为这些有前途的领域将在不久的将来取得重大进展，这是因为新型介孔有机改性二氧化硅基材料的合成爆炸性增长，以及在溶胶和凝胶化学的剪裁和构建中的巨大发展电极。 [参考：307]

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