Improved voltammetric peak separation and sensitivity of uric acid and ascorbic acid at nanoplatelets of graphitic oxide

被引：67

作者：

Chang, Jen-Lin ^{[1
]}

Chang, Kuo-Hsin ^{[2
,3
]}

Hu, Chi-Chang ^{[2
]}

Cheng, Wan-Ling ^{[1
]}

Zen, Jyh-Myng ^{[1
]}

机构：

[1] Natl Chung Hsing Univ, Dept Chem, Taichung 402, Taiwan

[2] Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu 30013, Taiwan

[3] Natl Chung Cheng Univ, Dept Chem Engn, Chiayi 621, Taiwan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2010年 / 12卷 / 04期

关键词：

Nanoplatelets of graphitic oxide; Edge plane; Uric acid; Ascorbic acid; Screen-printed electrode; MULTIWALLED CARBON NANOTUBES; EDGE PLANE SITES; ELECTROCHEMICAL SENSOR; HYDROTHERMAL DEHYDRATION; ELECTRON-TRANSFER; GRAPHENE OXIDE; PLATFORM; BLOOD;

D O I：

10.1016/j.elecom.2010.02.008

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this study, much improved voltammetric peak separation and sensitivity of uric acid and ascorbic acid was observed at a screen-printed carbon electrode modified with nanoplatelets of graphitic oxide (GO). Electrochemical sensing of uric acid and ascorbic acid was further used to explore the role of oxygen functionalities and edge plane sites on electrocatalysis at GO. We successfully apply a microwave-assisted hydrothermal elimination method to remove the oxygen-containing functional groups from the GO surface. The edge plane on GO can be retained and the density of oxygen-containing functional groups can be easily controlled by varying the microwave treatment temperature. Using this platform, such discrimination to peak separation is attributed to the very distinct behavior of uric acid and ascorbic acid to form hydrogen bonds with oxo-surface groups (especially COOH group) at GO. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：596 / 599

页数：4

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