文献类型：期刊文献

英文题名：Detection and adsorption of Hg2+ by new mesoporous silica and membrane material grafted with a chemodosimeter

作者：Zou, Qi[1]; Zou, Lei[1]; Tian, He[1]

机构：[1] Key Laboratory for Advanced Materials, Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China

年份：2011

卷号：21

期号：38

起止页码：14441

外文期刊名：Journal of Materials Chemistry

收录：EI(收录号：20114814552415)

语种：英文

外文关键词：Membranes - Silica - Solutions - Adsorption - Aluminum oxide - Alumina - Optical properties - Spectroscopic analysis - Dosimetry - Mesoporous materials - Metal ions

摘要：A novel organic-inorganic silica material (MCM-3T), prepared by covalent immobilization of the 2,1,3-benzothiadiazole-based chemodosimeter 3 and thiol group to the mesoporous silica material (MCM-48 type), was characterized by several spectroscopic methods. The MCM-3T shows excellent optical properties with a detection limit of ca. 8.0 × 10-6 M under optimized conditions and exclusively distinguishes the Hg2+ ion from other metal ions in aqueous solution. The MCM-3T can detect Hg2+ ion in a large pH range from 5.0 to 11.0, indicating its convenience for practical application. The MCM-3T is also an outstanding adsorbent for the removal of Hg2+ ion from aqueous solution. The adsorption process of Hg 2+ ion on the MCM-3T is well described by the Freundlich isotherm equation and the equilibrium adsorption capacity is 234.88 mg g-1. Furthermore, a new multifunctional silica membrane was synthesized on an alumina ceramic tube and characterized by SEM. The color and emission color of the membrane changed obviously and 90.7% of Hg2+ ion relative to the initial feed was removed after aqueous Hg2+ ion solution permeated through the membrane. This simple synthetic strategy, the economical starting materials, and the considerable signal changes exhibit a promising application of the MCM-3T and multifunctional silica membrane for the simultaneous detection and separation of Hg2+ ion in environmental and industrial fields. ? The Royal Society of Chemistry.