微分脉冲伏安法
石墨氮化碳
循环伏安法
纳米棒
电化学
材料科学
铁氰化物
电化学气体传感器
无机化学
纳米复合材料
玻璃碳
核化学
化学
电极
纳米技术
有机化学
光催化
催化作用
物理化学
作者
Jaysiva Ganesamurthi,Shaktivel Manavalan,Shen‐Ming Chen,Pitchaimani Veerakumar,Murugan Keerthi,Huang-Shen Tu
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2020-07-10
卷期号:8 (30): 11088-11098
被引量:72
标识
DOI:10.1021/acssuschemeng.0c00502
摘要
In the present work, we report a one-step pyrolysis synthesis of molybdenum nitride nanorods (MoN NRs) using ammonium heptamolybdate tetrahydrate as a precursor. Properties of MoN NRs have been improved by the sulfur-doped graphitic carbon nitride (MoN@S-GCN) nanocomposite, which has been used to modify the glassy carbon electrode (GCE) for the electrochemical determination of chloramphenicol (CAP). The large surface area of S-GCN-anchored MoN NRs in the nanocomposite demonstrates a synergistic effect of the transport of a kinetic barrier electron and a well-defined redox cycle within the ferricyanide system. In the electrochemical determination of CAP over MoN@S-GCN/GCE, cyclic voltammetry (CV) showed a superior electrochemical response to the CAP concentration, while bare GCE and other modified GCEs showed an inferior electrochemical response. In addition, different concentrations, scanning rates, and pH electrolyte tests have been performed for MoN@S-GCN/GCE, which verified that it is an appropriate candidate for electrochemical detection of CAP. Differential pulse voltammetry (DPV) in the electrochemical determination of CAP exhibits a low detection limit of 6.9 nM and a sensitivity of 1.0557 μM μA–1 cm–2 for the current response, yielding a linear increase with increasing concentration of CAP from 0.5 to 2450 μM. Moreover, the proposed sensor shows appreciable selectivity and satisfactory recovery for real samples of milk and eye drop solutions.
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