...
首页> 外文期刊>Journal of porous materials >Study on the preparation of CdTe nanocrystals on the surface of mesoporous silica and evaluation as modifier of carbon paste electrodes
【24h】

Study on the preparation of CdTe nanocrystals on the surface of mesoporous silica and evaluation as modifier of carbon paste electrodes

机译:介孔二氧化硅表面CdTe纳米晶体的制备及其作为碳糊电极改性剂的评价

获取原文
获取原文并翻译 | 示例
           

摘要

Here CdTe nanocrystals were grown onto mesoporous silicas. The influence of the surface areas, volumes and pore diameters of the silica matrices on the spectroscopic properties of CdTe was evaluated. Emission properties of the CdTe were found to depend on the textural properties of silicas. Electrochemical characterization of different electrodes (unmodified carbon paste, and carbon paste modified with the mesoporous silica and with CdTe anchored onto mesoporous silica) evidenced that the presence of CdTe nanocrystals lead to a significant increase of the anodic peak referring to Cu2+ detection. The electrode with optimal characteristics responded to Cu2+ in the linear range from 5.0x10(-8) to 2.3x10(-6) mol L-1 and the calculated limit of detection was 6.4x10(-8) mol L-1. The method developed here proved to be efficient for monitoring Cu2+ in sugar cane spirit (cachaca), with quantitative results comparable to those obtained from Flame Atomic Absorbtion Spectroscopy.
机译:在此,CdTe纳米晶体生长在介孔二氧化硅上。评估了二氧化硅基质的表面积,体积和孔径对CdTe光谱性质的影响。发现CdTe的发射性质取决于二氧化硅的质构性质。不同电极(未改性的碳糊以及用中孔二氧化硅和CdTe固定在中孔二氧化硅上改性的碳糊)的电化学表征表明,CdTe纳米晶体的存在导致阳极峰显着增加,这涉及到Cu2 +检测。具有最佳特性的电极在5.0x10(-8)到2.3x10(-6)mol L-1的线性范围内对Cu2 +作出响应,计算出的检出限为6.4x10(-8)mol L-1。事实证明,这里开发的方法对于监测甘蔗油中的铜离子是有效的,其定量结果可与火焰原子吸收光谱法相比。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号