Mesoporous nitrogen containing carbon materials for the simultaneous detection of ascorbic acid, dopamine and uric acid

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• 作者：Anju Joshi^aAuthor Vitae ; Wolfgang Schuhmann^bAuthor Vitae ; Tharamani C. Nagaiah^a ; ^{tharamani@iitrpr.ac.in" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Mesoporous nitrogen-rich carbonaceous material ; Ascorbic acid ; Uric acid ; Dopamine ; Scanning electrochemical microscopy ; Rotating disc electrode
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：230
• 期：Complete
• 页码：544-555
• 全文大小：3624 K

文摘

Mesoporous nitrogen rich carbonaceous (MNC) materials have been synthesized by pyrolyzing the polymerized ethylenediamine nanocasted into a SBA-15 hard template at 600 and 800 °C and explored for simultaneous determination of ascorbic acid (AA), dopamine (DA) and uric acid (UA). The electrocatalytic activity of these materials for the oxidation of analyte molecules was examined by means of redox-competition mode of scanning electrochemical microscopy (SECM), voltammetric, chronoamperometric and rotating disc electrode (RDE) measurements. MNC material exhibits a superior sensitivity towards the oxidation of AA, DA, and UA with a lowest detection limit of 0.01 μM, 0.001 μM and 0.01 μM respectively without any substantial interferences including glucose at physiologically relevant concentrations.