Periodic Mesoporous Organosilicas with Multifunctional Bridging and Surface Groups for Removal of Heavy Metal Ions

具有多功能桥联和表面基团的周期性介孔有机硅用于去除重金属离子

• 批准号: 0553014
• 负责人: Mietek Jaroniec
• 金额: $ 20万
• 依托单位: Kent State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-04-01 至 2010-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0553014&HistoricalAwards=false
• 关键词: Periodic; Mesoporous; Organosilicas; Multifunctional; Bridging

ABSTRACTProposal Number: CTS-0553014Institution: Kent State UniversityP.I.: Mietek JaroniecTitle: Periodic Mesoporous Organosilicas with Multifunctional Bridging and Surface Grooups for Removal of Heavy Metal IonsHeavy metal ions present in water constitute a serious threat for people and ecosystems, and consequently their removal is currently a major concern of the U.S. governmental agencies. Removal of these ions by ion exchange and selective adsorption attracts particular attention. The prior NSF project was focused on the synthesis of high capacity adsorbents for heavy metal ions by surface functionalization of ordered mesoporous silicas (OMSs) with multifunctional ligands. The main objective of the current project is to develop the so-called periodic mesoporous organosilicas (PMOs) with incorporated multifunctional bridging groups that show high affinity and selectivity towards heavy metal ions such as mercury and lead. In addition, the mesopore surface of these PMOs can be decorated with other multifunctional ligands to increase their selectivity and adsorption capacity. More specifically, we propose to synthesize new PMO-based adsorbents for removal of mercury ions and other heavy metal ions by designing their framework with multifunctional bridging groups such as tris[3-(trimethoxysilyl) propyl]isocyanurate and bis[3-(triethoxysilyl)propyl] tetrasulfide as well as decorating their surface with (3-mercaptopropyl) trimethoxysilane and diphenylthiocarbazone ligands. The performance of these adsorbents will be critically evaluated for removal of mercury and lead ions from aqueous solutions and the best combination of the surface functionality and porous structure will be established. In addition, the possibility of regeneration and reuse of the PMO-based adsorbents will be explored.

摘要提案编号：CTS-0553014机构：肯特州立大学P.I.：Mietek Jaroniec标题：具有多功能桥接和表面基团的周期性介孔有机硅去除重金属离子存在于水中的重金属离子对人类和生态系统构成严重威胁，因此它们的去除目前是美国政府机构的主要关注点。通过离子交换和选择性吸附去除这些离子引起了特别的关注。之前的NSF项目重点关注通过用多功能配体对有序介孔二氧化硅（OMS）进行表面官能化来合成高容量重金属离子吸附剂。目前项目的主要目标是开发所谓的周期性介孔有机硅（PMO），其中包含多功能桥接基团，对汞和铅等重金属离子表现出高亲和力和选择性。此外，这些PMO的介孔表面可以用其他多官能配体修饰，以增加其选择性和吸附容量。更具体地说，我们建议合成新的PMO基吸附剂，用于去除汞离子和其他重金属离子，通过设计它们的框架与多官能桥连基团，如三[3-（三甲氧基甲硅烷基）丙基]异氰脲酸酯和双[3-（三乙氧基甲硅烷基）丙基]四硫化物，以及装饰它们的表面与（3-巯丙基）三甲氧基硅烷和二苯基硫代卡巴腙配体。这些吸附剂的性能将严格评估从水溶液中去除汞和铅离子，并将建立表面功能和多孔结构的最佳组合。此外，将探讨PMO基吸附剂再生和再利用的可能性。