Hình thái bề mặt của các hạt nano vàng electrodeposited trên điện cực carbon thủy tinh và ứng dụng trong việc phát hiện hg (ii) ở nồng độ vết

• Ngôn ngữ: vie
• Ký hiệu phân loại: 537.85 Electricity and electronics
• Thông tin xuất bản: Hóa học, 2014
• Mô tả vật lý: 133-137
• Bộ sưu tập: Metadata
• ID: 563500

Tóm tắt

In the present study, we showed the variation of surface morphologies of gold nanoparticles (Au-NPs) on glassy carbon electrode (GCE) obtained by electrochemical method via controlling the electrochemical deposition time and stirring condition. The size in diameter of gold particles was not significantly changed with the variation of these conditions, whereas their surface coverage was strongly dependent. This behavior governed the enhancement of the peak current on the differential pulse voltammograms for reduction of Hg(II) bound to 4-pyridineethanethiolate self-assembled on gold particles through chemical preconcentration. This result clearly proves the applicability of the modified electrode in detection of Hg(II) at trace concentration.