菊状二硫化钼纳米片在蔬菜和水样中 Co(II)的固相萃取中的应用。
Application of dahlia-like molybdenum disulfide nanosheets for solid phase extraction of Co(II) in vegetable and water samples.
机构信息
School of Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran.
School of Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran.
出版信息
Food Chem. 2017 May 15;223:8-15. doi: 10.1016/j.foodchem.2016.12.023. Epub 2016 Dec 10.
Recently, molybdenum disulfide has been attracted considerable attention due to its unique three layered structure. Adsorption sites with abundant electron density on edges and surfaces of MoS can adsorb different metal ions with no need to ligand and functionalization. In this study, dahlia-like MoS nanosheets were prepared by a simple hydrothermal method and characterized using different tools such as FESEM, TEM, EDX, XRD, DLS and zeta potential measurements. Then, they were applied for solid phase extraction of Co(II) as an example of heavy metals. Different factors (the pH, adsorbent amount, contact time, type of eluent, matrix and reusability) affecting the extraction process were studied. Under optimum conditions, the relative standard deviation, adsorption capacity and limit of detection were 2.3%, 80.0mgg and 0.31μgL, respectively. The accuracy of the method was confirmed by analyzing the standard reference material (SRM 1640a) and spiked real samples.
最近，由于二硫化钼独特的三层结构，它引起了相当多的关注。边缘和表面上丰富电子密度的吸附位可以吸附不同的金属离子，而无需配体和功能化。在这项研究中，通过简单的水热法制备了类鹤望兰状的 MoS 纳米片，并使用 FESEM、TEM、EDX、XRD、DLS 和 zeta 电位测量等不同工具对其进行了表征。然后，以 Co(II)为例，将其应用于重金属的固相萃取。研究了影响萃取过程的不同因素（pH 值、吸附剂用量、接触时间、洗脱剂类型、基体和可重复性）。在最佳条件下，相对标准偏差、吸附容量和检测限分别为 2.3%、80.0mgg 和 0.31μgL。通过分析标准参考物质（SRM 1640a）和加标实际样品，验证了该方法的准确性。
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