石墨烯/酞菁钴复合材料对亚硝酸根的催化性能

研究石墨烯/酞菁钴复合材料的制备方法及电催化性能,采用微波合成法,以石墨烯(GR)、氯化钴和邻苯二腈为原料,原位合成了石墨烯/酞菁钴(GR/CoPc)复合材料. 通过紫外-可见光谱(UV-vis)、透射电子显微镜(TEM)、拉曼(Raman)光谱、X射线衍射(XRD)、红外光谱(FT-IR)对其结构、微观形貌进行表征,酞菁钴呈棒状均匀分布于石墨烯的片层表面. 制备了GR/CoPc/GCE修饰电极并研究了亚硝酸根在修饰电极上的电化学行为及其作用机理. GR/CoPc/GCE修饰电极对NO₂-的电催化性能较单独的CoPc和GR修饰电极相比明显提高. 在实验条件下,亚硝酸根在GR/CoPc/GCE修饰电极上的响应电流与其浓度在1.67～644.27μmol/L的范围内呈良好的线性关系,检测限可达0.6μmol/L. 该修饰电极对亚硝酸根的检测有良好的稳定性、抗干扰性及重现性. 

Graphene-Cobalt Phthalocyanine Complex for Electro-Catalytic of Nitrite

The preparation method of graphene/cobalt phthalocyanine (GR/CoPc) and its eletrocatalysis performance was presented. Synthesized by microwave-assisted method (DMEA as the solvent), with graphene (GR), anhydrous cobalt chloride and dicyanobenzene, the GR/CoPc complex was characterized by UV-vis, TEM, Raman, XRD and FT-IR. The GR/CoPc has CoPc distributed uniformly on its suface. EIS, CV, CA were used to study the electrocatalytic performance of the electrodes modified by GR/CoPc, CoPc and GR. The results show that GR/CoPc/GCE exhibits better electrocatalytic activity than CoPc/GCE and GR/GCE, towards the oxidation of NO₂-. The GR/CoPc/GCE shows broad linear range (1.67～644.27μmol/L), good stability, anti-interference and reproducible, with detection limit of 0.6μmol/L.