An Original Tin-Covered Carbon Paste Electrode Combined N-Doped CMK-3 to Detect Trace Copper by Anodic Stripping Voltammetry

作者：Li, Dong; Tang, Li; Luo, Hong-Qun; Li, Nian-Bing^*

来源：Journal of Nanoelectronics and Optoelectronics, 2018, 13(7): 1028-1033.

DOI：10.1166/jno.2018.2354

• Sn/N-Doped CMK-3/CPE
• N-Doped CMK-3/CPE
• Sn/CPE
• Bare CPE
• Trace Copper
• Ordered Mesoporous Carbons (OMCs)

An original tin-covered carbon paste electrode combined N-doped CMK-3 was discussed. As one kind of the ordered mesoporous carbons (OMCs), N-doped CMK-3 has advantages of conducting electrons because the pore is regularly ordered and controllable, with the pore diameters of 7-9 nm, pore volume of 0.65-0.7 cm(3) g(-1), specific square area of 500-600 m(2) g(-1). The Sn/N-doped CMK-3/CPE enhanced the signal of peak current for detection of Cu(II), which is better than the N-doped CMK-3 modified carbon paste electrode, the bare carbon paste electrode, and the tin film modified carbon paste electrode. The optimum conditions are as follows: the mass of N-doped CMK-3 is 4 mg, the Sn(II) concentration is 7.5 mg L-1, the deposition potential is -1.3 V, and the deposition time is 350 s, the pH of the hydrochloric acid solution is 4.75. The Sn/N-doped CMK-3/CPE exhibited large linear range of 6.0-100.0 mu g L-1 with the detection limit of 0.073 mu mol L-1 for Cu(II). The sensor shows eminent results in the process of detecting Cu(II) in river samples with good recoveries.

• 出版日期2018-7
• 单位西南大学