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  • 09월 05일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 One-step electrochemical co-reduction synthesis of electrochemically reduced graphene oxide (ERGO) and gold nanoparticles (AuNPs) nanohybrid composite for electrocatalytic detection of dopamine

2017년 8월 31일 16시 59분 23초
ELEC.P-500 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 20일 (금요일) 13:00~14:30
저자 및
Chang-Seuk Lee, sujean Shim, Tae Hyun Kim*
Department of Chemistry, Soonchunhyang University, Korea
Here, we fabricated the electrochemically reduced graphene oxide (ERGO) and gold nanoparticles (AuNPs) nanohybrid composite that was utilized successfully for the electrocatalytic detection of dopamine (DA), ascorbic acid (AA), and uric acid (UA), simultaneously. ERGO/AuNP nanohybrid composite was modified on glassy carbon electrode (GC) by graphene oxide (GO) using cyclic voltammetry (CV) technique. The ERGO/AuNP/GC electrode was obtained using graphene oxide (GO) and aurate ion (Au3+) mixed solution (0.3 mg mL-1 GO, 0.3 mg mL-1 Au3+ in 10 mM PBS buffer solution) by scan from -1.5 V to 0.8 V (vs. Ag/AgCl reference electrode) three times at a scan rate of 10 mV s-1. The ERGO/AuNP/GC was characterized by scanning electron microscopy (SEM), Raman spectroscopy, contact angle measurements, electrochemical impedance spectroscopy, and cyclic voltammetry (CV). The electrochemical performance of the ERGO/AuNP/GC with respect to the detection of DA, AA and UA in 0.1 M PBS (pH 7.4) was investigated by differential pulse voltammetry (DPV) and amperometry. The ERGC/GC exhibited three well-separated voltammetric peaks along with the increased oxidation currents in DPV measurements, which enables simultaneous and individual detection of DA, AA and UA. Detection limits were found to be 0.8 μM, 30 μM and 10 μM for DA, AA and UA, respectively, with S/N ratio of 3 using the amperometric i–t curve technique.