A Sensitive Electrochemical Sensor Based on Dual Co-Doped N, P-rGO for Simultaneous Determination of Hydroquinone and Catechol
A Sensitive Electrochemical Sensor Based on Dual Co-Doped N, P-rGO for Simultaneous Determination of Hydroquinone and Catechol
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DOI：
10.1149/1945-7111/abdc67
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发表时间：
2021-01
影响因子：
3.9
通讯作者：
Yan-Yan Liu-Yan;Ruirui Xie;Xun Zou;Jiamin Liu;Zhiyong Wu;C. Peng;Peng Zhao
中科院分区：
文献类型：
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作者：
Yan-Yan Liu-Yan;Ruirui Xie;Xun Zou;Jiamin Liu;Zhiyong Wu;C. Peng;Peng Zhao
本文采用一锅法制备了N、P共掺杂还原型氧化石墨烯（N，P-rGO），并利用SEM和电化学技术对其进行了表征。结果表明，N，P-rGO具有良好的导电性和比表面积，对水溶液中共存的对苯二酚（HQ）和邻苯二酚（CC）具有良好的电催化活性。在最佳条件下，与裸玻碳电极（GCE）和N掺杂还原氧化石墨烯（N-rGO）修饰的GCE（N-rGO/GCE）相比，N，P-rGO/GCE对HQ和CC表现出良好的同时测定性能。N，P-rGO/GCE测得HQ和CC的氧化峰电位差为106 mV，表明N，P-rGO/GCE具有良好的分辨率。在1 μM ~ 100 μM浓度范围内，HQ和CC的检出限分别为62.1 nM和99.7 nM。同时，N，P-rGO/GCE具有良好的选择性、稳定性和重现性。将该传感器成功应用于自来水中两种异构体的检测，HQ和CC的回收率分别为99.52%~ 106.36%和95.5%~ 103.97%，验证了N，P-rGO/GCE的实际应用潜力。
In this paper, the N and P co-doped reduce graphene oxide (N, P-rGO) was prepared with one-pot solution method and characterized by using SEM and electrochemical technology. It was found that the N, P-rGO has an outstanding conductivity, large surface area and excellent electrocatalytic activity to hydroquinone (HQ) and catechol (CC), which usually coexist in aqueous environment. Under the optimal conditions, compared with bare glassy carbon electrode (GCE) and N doped reduce graphene oxide (N-rGO) modified GCE (N-rGO/GCE), the N, P-rGO/GCE displayed an excellent simultaneous determination towards HQ and CC. And the oxidation peak potential difference of HQ and CC obtained from N, P-rGO/GCE was 106 mV, indicating N, P-rGO/GCE has excellent resolution. The obtained detection limit was 62.1 nM and 99.7 nM for HQ and CC in a concentration range of 1 μM to 100 μM, respectively. At the same time, N, P-rGO/GCE also displayed satisfied selectivity, decent stability and desirable reproducibility. Furthermore, the fabricated sensor was successfully applied to detect two isomers in tap water and the recoveries of 99.52% to 106.36% and 95.5% to 103.97% for HQ and CC were obtained, which verified the practical application potential of N, P-rGO/GCE.