Jiqu Han, Qixia Yang
School of Opto-electronic Information Science and Technology, Yantai University, Yantai, Shandong 264005, China.
School of Environment and Materials Engineering, Yantai University, Yantai, Shandong 264005, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Oct 5;149:487-93. doi: 10.1016/j.saa.2015.04.075. Epub 2015 Apr 30.
In the present paper, a core-shell structured inorganic-organic hybrid nanocomposite for Hg(II) sensing and removal was designed and fabricated, where the core was composed of superparamagnetic Fe3O4 and the shell consisted of molecular silica sieve MCM-41. A rhodamine derived probe was grafted onto the backbone of MCM-41 through a silane coupling reagent to control its loading content. This probe functionalized core-shell structure was confirmed and characterized by XRD analysis, electron microscopy images, IR spectra, thermogravimetry and N2 adsorption/desorption isotherms. It was found that the emission of this composite increased with increasing Hg(II) concentrations but was immune to other metal ions, showing good selectivity and high sensitivity towards Hg(II) ions. A linear Stern-Volmer curve was observed with short response time. In addition, this composite possessed good Hg(II)-removing and recycling performance.
在本论文中，设计并制备了一种用于汞（II）传感与去除的核壳结构无机-有机杂化纳米复合材料，其中核由超顺磁性Fe3O4组成，壳由分子筛MCM-41组成。通过硅烷偶联剂将一种罗丹明衍生探针接枝到MCM-41的主链上以控制其负载量。通过X射线衍射分析、电子显微镜图像、红外光谱、热重分析和N2吸附/脱附等温线对这种探针功能化的核壳结构进行了确认和表征。结果发现，该复合材料的发射强度随汞（II）浓度的增加而增强，但对其他金属离子不敏感，对汞（II）离子表现出良好的选择性和高灵敏度。观察到线性的斯特恩-沃尔默曲线，响应时间短。此外，该复合材料具有良好的汞（II）去除和循环性能。
