碳纳米管修饰电极在酸性溶液中对NO_2^-的检测

Carbon Nanotube Powder Microelectrode's Detection of Nitrite in the Solution

在载有Os(bpy) 3 2 + 的碳纳米管粉末微电极上 ,第一步及第二步还原平台电势上 ,NO2 -离子检测的灵敏度及温度系数分别为 5 .7A·cm-2 ·mol-1和 6 .8A·cm-2 ·mol-1及 0 .16 % /℃和 0 .14 % /℃ .检测限为10 -7μmol/dm3 .拥有如此高的灵敏度和很低的温度系数 。

Through the performance of carbon nanotube powder microelectrodes with anodic treatment and Os(bpy) 3 2+ solution for NO 2 - detection, the first and second plateau potential detection sensitivity reach 5.7 A·cm -2 ·mol -1 and 6.8 A·cm -2 ·mol -1 ; the temperature coefficient reaches 2 mol -1 0.16%/℃ and 0.14%/℃. This kind of carbon nanotube powder microelectrode may be of great interest for us to study the NO 2 - sensor.