Detection of phenol at boron-doped nanocrystalline diamond electrodes

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• 作者：A.F. Azevedo ; ^{adriana@las.inpe.br}  ; [Author Vitae] ; F.A. Souza  ; [Author Vitae] ; J.T. Matsushima  ; [Author Vitae] ; M.R. Baldan  ; [Author Vitae] ; N.G. Ferreira  ; [Author Vitae]
• 关键词：Nanocrystalline ; Doped diamond films ; Phenol oxidation ; Electroanalysis ; Detection ; Chromatography
• 刊名：Journal of Electroanalytical Chemistry
• 出版年：2011
• 出版时间：15 July 2011
• 年：2011
• 卷：658
• 期：1-2
• 页码：38-45
• 全文大小：1180 K

文摘

The phenol quantification using boron-doped nanocrystalline diamond (BDND) from electroanalytical technique of square wave voltammetry (SWV) is reported. BDND depositions were performed using Hot Filament Chemical Vapor Deposition reactor, where it was possible to grow films with statics substrate-holder (sample S1) or with spinning substrate-holder (sample S2). The variation of this growth parameter induced significant changes on the electrode properties. For example, the electrode S2 presented smoothness surface with low roughness in relation to that for electrode S1. Besides, Raman spectra showed different features for both electrodes that could be related to boron incorporation. Electrochemical measurements also presented differences between electrodes, showing the advantages of electrode S2, such as, rapid charge transfer, large electrochemical area and excellent phenol detection limit ?.1 mg L^?. The phenol standard sample of 8.0 mg L^? was used to validate the application of this electrode as a nanosensor. Its concentration calculated from SWV using electrode S2 was 8.2 ¡À 0.2 mg L^? while from Ion Chromatograph it was 7.9 ¡À 0.1 mg L^?. These results demonstrated the high potential of BDND electrodes for electroanalytical applications.