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形貌可控钒酸铜纳米晶在电化学传感应用上具有非常重要的意义。采用简便的水热合成方法,制备出一系列具有不同形貌的的钒酸铜纳米晶(纳米颗粒,纳米带和纳米花)。采用XRD、SEM和循环伏安法(CV)等测试技术,对各种钒酸铜纳米晶产物的物相组成、形貌和电化学性能进行表征。结果表明,Cu_3V_2O_7(OH)_2·2H_2O(CVOH)晶体的形貌可以通过改变铜盐、表面活性剂种类以及溶液p H值进行调控。采用CVOH纳米晶作为活性材料修饰玻碳电极(GCEs)发现,电极对抗坏血酸的响应性能增强。比较三种不同形貌的钒酸铜纳米晶,纳米带状对电极的增强效应最显著。钒酸铜纳米带修饰GCEs电化学感应抗坏血酸,其CV的峰值电流与其浓度呈正比。因此,CVOH纳米晶体可作为检测抗坏血酸的电化学活性材料。
The morphology of controlled vanadic acid copper nanocrystals in the electrochemical sensing applications has a very important significance. A series of copper vanadate nanocrystals (nanoparticles, nanoribbons and nano-flowers) with different morphologies were prepared by a simple hydrothermal method. The phase composition, morphology and electrochemical properties of various copper vanadate nanocrystals were characterized by XRD, SEM and cyclic voltammetry (CV). The results show that the morphology of Cu_3V_2O_7 (OH) _2 · 2H_2O (CVOH) crystals can be controlled by changing the copper salts, surfactants and p H value of the solution. The CVOH nanocrystal as an active material modified glassy carbon electrode (GCEs) found that the electrode response to ascorbic acid enhanced performance. Comparison of three different morphologies of copper vanadate nanocrystals, nanobelts, the most significant enhancement effect. Copper vanadate nanoribbon modified GCEs electrochemically induced ascorbic acid, the CV peak current is proportional to its concentration. Therefore, CVOH nanocrystals can be used as electrochemically active materials for the detection of ascorbic acid.