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N-doped reduced graphene oxide /MnO2 nanocomposite for electrochemical detection of Hg2+ by square wave stripping voltammetry

采用方波溶出伏安法电化学检测Hg2+的N掺杂还原氧化石墨烯/MnO2纳米复合材料

关键词:
来源:
ELECTROCHIMICA ACTA
全文链接1:
http://agri.ckcest.cn/topic/downloadFile/325df69f-f1ed-491f-abf1-a91bbb47c746
全文链接2:
类型:
学术文献
语种:
英文
原文发布日期:
2018-09-21
摘要:
In this paper, N-doped reduced graphene oxide and MnO2 nanocomposite (N-RGO/MnO2) was synthesized via hydrothermal method, which was used to modify the glass carbon electrode (GCE) for electrochemical detection of Hg2+. p-phenylenediamine was used as the nitrogen source and "bridging" molecule between MnO2 and RGO. The electrochemical sensing performance towards Hg2+ was evaluated by square wave anodic stripping voltammetry method. The presence of N-RGO/MnO2 nanocomposite has enhanced the electrochemical performance of the GCE toward Hg2+. The N-RGO/MnO2 nanocomposite modified electrode was found to have a good sensitivity toward Hg2+ and the favorable sensitivity (72.16 mA/mM) and LOD (0.0414 nM) for Hg2+ were achieved under the optimized conditions. Moreover, the modified electrode possessed a good stability and reproducibility. The excellent performance can be attributed to the characteristic nanostructure and N-doping property of the N-RGO/MnO2 nanocomposite. This electrochemical sensing strategy is expected to enrich the application field of electrochemical determination and does good to the issue of environment pollution analysis.
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