铌酸盐纳米薄膜对微量铜离子检测及定量分析

Detection and Quantitative Analysis of Copper Ions over Niobate Nano-films

为了扩充HNbWO 6和HNbMoO 6材料的应用范围和水体微量重金属离子的定量检测手段,通过层层自组装法制备HNbWO 6和HNbMoO 6纳米薄膜材料,采用XRD、UV-vis、CV曲线、I-t曲线以及EIS曲线等表征方式对HNbWO 6和HNbMoO 6纳米薄膜材料的晶相和电化学性质进行测试。比较HNbWO 6和HNbMoO 6纳米薄膜材料的电化学性能,选取性能优异的纳米薄膜,考察薄膜材料层数对其电化学性质的影响。研究具有最优层数的多层薄膜材料对微量元素的检测和定量分析。结果显示,HNbWO 6纳米薄膜具有比HNbMoO 6纳米薄膜更优异的电化学性能。在1~10层范围内,10层的HNbWO 6纳米薄膜材料具有更强的电化学性质和更高的稳定性。通过促进电子-空穴的复合,选择性的检测环境中的微量铜离子,并定量分析Cu^2+浓度。

In order to expand the application fields of HNbWO 6 and HNbMoO 6 materials and the quantitative detection method of the trace heavy metal ions in water,HNbWO 6 and HNbMoO 6 nano-film materials were prepared through the layer-by-layer self-assembly.The crystal phase and the electrochemical properties of nano-film materials were characterized by powder XRD,UV-vis,CV curves,I-t curves and EIS curves.The electrochemical properties of HNbWO 6 and HNbMoO 6 nano-film materials were compared.The nano-film materials with excellent performance were selected to investigate the effect of the number of the nano-film on the electrochemical properties.The detection and quantitative analysis of trace elements were studied over the multilayer nano-films with optimal number of layers.The results show that the electrochemical properties of HNbWO 6 nano-film materials are stronger than those of HNbMoO 6 nano-film materials.The electrochemical properties and stability of the 10-layered HNbWO 6 nano-film materials are stronger than those of the others in the range of 1 to 10 layers.The trace copper ions in the environment can be selectively detected and quantitative analyzed by the 10-layered HNbWO 6 nano-film materials via promoting the recombination of the electron and hole of the compound.