Graphitic Carbon Nitride/Chitosan Composite for Adsorption and Electrochemical Determination of Mercury in Real Samples
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- 作者：Mandana Amiri ; Haneie Salehniya ; Aziz Habibi-Yangjeh
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2016
- 出版时间：July 27, 2016
- 年：2016
- 卷：55
- 期：29
- 页码：8114-8122
- 全文大小：569K
- 年卷期：0
- ISSN：1520-5045
文摘
In this research, graphitic carbon nitride (g-C3N4) was synthesized using pyrolysis of melamine and its phase, morphology, composition, and structure were characterized by using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy dispersive analysis of X-rays, and FT-IR spectroscopy. The modification of carbon paste electrode with g-C3N4/chitosan composite has been performed using the casting method. Experimental results demonstrated the superb adsorptive properties of g-C3N4/chitosan composite through Hg(II). Differential pulse voltammetry (DPV) was applied for quantitative determinations. The linear calibration curves is obtained in the ranges of 1.0 × 10–6to 8.0 × 10–5 mol L–1 and 1.0 × 10–7 to 5.0 × 10–6 mol L–1. The proposed protocol can offer a highly selective and sensitive method for the detection of Hg(II) with a detection limit of 1.0 × 10–8 mol L–1. Determination of Hg(II) was performed in the presence of Fe(II) and Cu(II). Finally, the modified electrode has been applied for sensitive determination of Hg(II) in real samples.