Simultaneous detection and removal of metal ions based on a chemosensor composed of a rhodamine derivative and cyclodextrin-modified magnetic nanoparticles

A variety of chemosensors have been reported for detection of metal ions. However, the metal ions could not be separated and removed at the same time for the goal of water purification. This paper presents to detect and remove metal ions from aqueous solution simultaneously by a fluorescence chemosensor and functional magnetic nanoparticles. A novel probe adamantyl (AD)–maleic anhydride (MAH)–rhodamine B (RhB) was designed and synthesized from RhB, ethylene diamine, MAH, and AD. AD–MAH–RhB showed high selectivity and sensitivity to metal ions in aqueous solution. The sensing mechanism was explored by FTIR and mass spectra. The results suggested that AD–MAH–RhB could conjugate with metal ions and form the binding complexes with various stoichiometries of probe and metal ions. Moreover, β-cyclodextrin-modified magnetic nanoparticles (CD-MNP) were fabricated and used as host materials to form inclusion complex of CD-MNP and AD–MAH–RhB-metal ions. Then, the metal ions could be removed by an outer magnet, which were confirmed by fluorescent spectrum. The probe and CD-MNP had the great potential application for sewage treatment.     

光伏电站设计智能优化

由于目前光伏电站设计目前没有相应的标准,因此以个人经验为指导的情况,无法保证电站建设的成本最优,鉴于此问题,本文提出了一种光伏电站优化设计方法,基于模拟退火算法,通过对光伏区域中的组件进行最优分组来实现两级电缆成本的最优。并通过实际项目对该算法进行检验,达到比较理想效果。     

园子沟选煤厂洗选工艺比选

通过对园子沟煤矿煤质特征的分析和目标市场的调研,对"100~8 mm块煤采用重介浅槽分选"、"100~13 mm块煤采用重介浅槽,13~6 mm粒煤采用有压两产品重介旋流器分选"两种脱粉入洗工艺进行了技术经济比较,发现前者优势明显,其比选结果对动力煤洗选工艺选择有一定的借鉴意义。     

自旋转移力矩磁隧道结的建模与仿真

自旋转移力矩磁隧道结(STT-MTJ)是一种新兴的非易失性存储单元.因为有着掉电后数据不丢失、无限的写次数、与CMOS工艺兼容、不会增加器件面积以及良好的可缩放性等诸如多优点而得到了广泛的研究.但是由于目前的工艺厂商尚未推出相应的模型,研究者难以先期使用该技术进行电路设计.文章介绍了STT-MTJ的工作原理,详细研究了使用Verilog-A对STT-MTJ建模的思路,并在HSPICE中进行了仿真验证,为后续的STT-MTJ研究奠定了基础.