Nafion公司
碳纳米管
对苯二酚
间苯二酚
微分脉冲伏安法
电化学
电极
自来水
儿茶酚
材料科学
无机化学
伏安法
碳纤维
检出限
电化学气体传感器
循环伏安法
化学
核化学
纳米技术
有机化学
复合数
复合材料
色谱法
物理化学
环境工程
工程类
作者
Chan Wei,Qitong Huang,Shirong Hu,Hanqiang Zhang,Wuxiang Zhang,Zhaoming Wang,Menglin Zhu,Pingwang Dai,Linjun Huang
标识
DOI:10.1016/j.electacta.2014.10.051
摘要
In this work, an excellent electrochemical sensor based on Nafion/multi-walled carbon nanotubes/carbon dots/multi-walled carbon nanotubes (Nafion/MWCNTs/CDs/MWCNTs) for simultaneous determination of hydroquinone (HQ), catechol (CC) and resorcinol (RS) in 0.1 M phosphate buffer solutions (PBS, pH = 7.0) was found. The functioned MWCNTs, which contained amido bond, were combined to CDs via the electrostatic interaction to build the Nafion/MWCNTs/CDs/MWCNTs modified electrode. As we know, MWCNTs have large specific surface area and CDs have electrical conductivity, which were benefited to build the composite modified electrode. The three dihydroxybenzene isomers could well separate from each other at the scan rate of 100 mV s−1 with a potential difference of 119 mV and 419 mV for the oxidation peak potentials of HQ–CC and CC–RS, respectively. Differential pulse voltammetry (DPV) was used for the simultaneous determination of HQ, CC and RS in their ternary mixture. The peak current obtained was linearly dependent on the HQ, CC and RS concentrations in the range of 1.0 to 200.0 μM, 4.0 to 200.0 μM and 3.0 to 400.0 μM and the detection limits for HQ, CC and RS were 0.07 μM, 0.06 μM and 0.15 μM (S/N = 3), respectively. The modified electrode was applied to detect the tap water, well water and river water and the recoveries of tap water, well water and river water samples were 100.3–109.8% for HQ, 96.0–105.8% for CC and 83.4–101.6% for RS, respectively.
科研通智能强力驱动
Strongly Powered by AbleSci AI