Study on the application of reduced graphene oxide and multiwall carbon nanotubes hybrid materials for simultaneous determination of catechol, hydroquinone, p-cresol and nitrite

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• 作者：Fangxin Hu ; Shihong Chen ; ^{cshong@swu.edu.cn} ; Chengyan Wang ; Ruo Yuan ; ^{yuanruo@swu.edu.cn} ; Dehua Yuan ; Cun Wang
• 关键词：Reduced graphene oxide ; Multiwall carbon nanotubes ; Hybrid materials ; Environmental contamination ; Simultaneous detection
• 刊名：Analytica Chimica Acta
• 出版年：2012
• 期刊代码：2_00032670
• 类别：ch
• 出版时间：29 April, 2012
• 卷：724
• 期：Complete
• 页码：40-46
• 文件大小：1123 K

摘要

In this paper, the reduced graphene oxide and multiwall carbon nanotubes hybrid materials (RGO-MWNTs) were prepared and a strategy for detecting environmental contaminations was proposed on the basis of RGO-MWNTs modified electrode. The hybrid materials were characterized by the scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and N₂ sorption-desorption isotherms. Due to the excellent catalytic activity, enhanced electrical conductivity and high surface area of the RGO-MWNTs, the simultaneous measurement of hydroquinone (HQ), catechol (CC), p-cresol (PC) and nitrite (NO₂^{鈭?/sup>) with four well-separate peaks was achieved at the RGO-MWNTs modified electrode. The linear response ranges for HQ, CC, PC and NO₂鈭?/sup> were 8.0-391.0 渭M, 5.5-540.0 渭M, 5.0-430.0 渭M and 75.0-6060.0 渭M, correspondingly, and the detection limits (S/N = 3) were 2.6 渭M, 1.8 渭M, 1.6 渭M and 25.0 渭M, respectively. The outstanding film forming ability of RGO-MWNTs hybrid materials endowed the modified electrode enhanced stability. Furthermore, the fabricated sensor was applied for the simultaneous determination of HQ, CC, PC and NO₂鈭?/sup> in the river water sample.}