Sol-Gel Synthesized Adsorbents for Metal Separation  

作　　者：L. L. Tavlarides J. S. Lee K. H. Nam N. Agarwal 

机构地区：[1]Department of Chemical Engineering and Materials Science, Syracuse University, Syracuse, NY 13244, USA

出　　处：《Tsinghua Science and Technology》2006年第2期233-240,共8页清华大学学报（自然科学版（英文版）

基　　金：National Science Foundation (Nos. CTS-9805118 and CTS-0120204)

摘　　要：A series of organo-ceramic adsorbents have been synthesized by a sol-gel processing technique for metal ion extraction. These adsorbents generally have significantly high metal uptake capacities, good physical-chemical stabilities, and well-designed pore geometries compared to other pre-existing metalchelating ceramic-based adsorbents. This work describes the synthesis and evaluation of pyrazole and calix[4]arene crown adsorbents for selective separation of platinum, palladium, and gold and cesium ions, respectively, from solutions. These materials exhibit mesoporous properties with high surface areas and pore volumes. The sol-gel synthesis starting with precursor silanes and titania results in gel particles of desired pore characteristics and high capacity and stability. Characterization studies, such as adsorption isotherms, breakthrough curves for fixed bed operation, and material stability, show promising results for applications to metal sepation.A series of organo-ceramic adsorbents have been synthesized by a sol-gel processing technique for metal ion extraction. These adsorbents generally have significantly high metal uptake capacities, good physical-chemical stabilities, and well-designed pore geometries compared to other pre-existing metalchelating ceramic-based adsorbents. This work describes the synthesis and evaluation of pyrazole and calix[4]arene crown adsorbents for selective separation of platinum, palladium, and gold and cesium ions, respectively, from solutions. These materials exhibit mesoporous properties with high surface areas and pore volumes. The sol-gel synthesis starting with precursor silanes and titania results in gel particles of desired pore characteristics and high capacity and stability. Characterization studies, such as adsorption isotherms, breakthrough curves for fixed bed operation, and material stability, show promising results for applications to metal sepation.

关 键 词：metal separation organo-ceramic adsorbent CALIX[4]ARENE sol-gel synthesis MESOPOROUS 

分 类 号：TF111[冶金工程—冶金物理化学]