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제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Electrocatalytic activity of molybdenum oxide nanoparticles dispersed on 2,6-diaminopyridine functionalized reduced graphene toward dopamine detection in presence of ascorbic acid.

등록일
2019년 2월 14일 15시 20분 57초
접수번호
4501
발표코드
ELEC.P-468 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 18일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Electrochemistry
저자 및
공동저자
Nipa Roy, seungwon Jeon Jeon seung-won1,*
Chemistry, Chonnam National University, Bangladesh
1Department of Chemistry, Chonnam National University, Korea
We have reported the synthesis of a 2,6-diaminopyridine functionalized electrochemically reduced graphene supported MoO3 (2,6 DAP-ERGO/MoO3) nanocomposite by hydrothermal method and tested as an electro active catalyst for the detection of dopamine (DA) in presence of ascorbic acid (AA). The 2,6 DAP-ERGO/MoO3 nanocomposite has been characterized by X-ray photoelectron spectroscopy (XPS) & field emission transmission electron microscopy (FE-TEM) technique. The electrochemical determination of dopamine was confirmed over the cyclic voltammetry (CV), Differential pulse voltammetry (DPV) in the presence of Ascorbic Acid at a high concentration as well as chronoamperometric (CA) experiment in a 0.1 M phosphate buffer solution (PBS) at pH 7.4. The impact of interference has been checked in being of several electro active biomolecules such as ascorbic acid (AA), serotonin (5-HT), glucose, Hydrazine (N2H4) and uric acid (UA). The 2,6 DAP-ERGO/MoO3 modified electrode demonstrated an attractive electrochemical response with relatively better sensitivity (271.57 μA mM-1cm-2) a broad linear detection range (0.1 μM - 900 μM) & detection limit 0.142 μM ) (S/N = 3). The diffusion coefficient for dopamine determination has been estimated as 4.6 × 10-8 cm2 s-1. The practical application of this proposed nanocomposite was analyzed using human urine sample which exhibited satisfactory result.

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