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DOI码：10.1002/chem.200700011

发表刊物：Chem. Eur. J.

摘要：It was found that chloroauric acid (HAuCl4) could be directly reduced by the luminescent reagent luminol in aqueous solution to form gold nanoparticles (AuNPs), the size of which depended on the amount of luminol. The morphology and surface state of as-prepared AuNPs were characterized by transmission electron microscopy, UV/visible spectroscopy, X-ray photoelectron spectroscopy, FTIR spectroscopy, and thermogravimetric analysis. All results indicated that residual luminol and its oxidation product 3-aminophthalate coexisted on the surface of AuNPs through the weak covalent interaction between gold and nitrogen atoms in their amino groups. Subsequently, a luminol-capped AuNP-modified electrode was fabricated by the immobilization of AuNPs on a gold electrode by virtue of cysteine molecules and then immersion in a luminol solution. The modified electrode was characterized by cyclic voltammetry, electrochemical impedance spectroscopy, and scanning electron microscopy. The as-prepared modified electrode exhibited an electrochemiluminescence (ECL) response in alkaline aqueous solution under a double-step potential. H2O2 was found to enhance the ECL. On this basis, an ECL sensor for the detection of H2O2 was developed. The method is simple, fast, and reagent free. It is applicable to the determination of H2O2 in the range of 3×10−7–1×10−3 mol L−1 with a detection limit of 1×10−7 mol L−1 (S/N=3).

合写作者：段春凤,董永平,郭吉兆

第一作者：王伟

论文类型：期刊论文

通讯作者：崔华

学科门类：理学

文献类型：J

卷号：13

期号：24

页面范围：6975-6984

是否译文：否

发表时间：2007-08-07

收录刊物：SCI

发布期刊链接：https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/chem.200700011