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介孔金属有机框架中均相催化剂的表面密封封装
作者:小柯机器人 发布时间:2022/1/12 10:06:34

上海科技大学李涛团队报道了介孔金属有机框架中均相催化剂的表面密封封装策略。相关研究成果于2022年1月7日发表于国际顶尖学术期刊《美国化学会杂志》。

研究人员已开发出快速表面密封策略,用于将均相催化剂磷钨酸(PTA)封装在介孔金属-有机框架(MOF)MIL-101(Cr)中。这种新的表面聚合方法利用非溶剂诱导相分离将多胺和二酐单体浓缩并引导到MOF颗粒表面,从而在几秒钟内形成小于10 nm、均匀且交联的聚合物涂层。表面密封的PTA-MOF复合催化剂在充分保持纯PTA对苯酚催化分解的催化活性的同时,可重复使用多达10次,且没有明显的活性损失,PTA的浸出可以忽略不计。

由于该表面涂覆方法不受MOF或催化剂的限制,因此它将成为MOFs中均相催化剂固定化的首选技术。

附:英文原文

Title: Surface-Seal Encapsulation of a Homogeneous Catalyst in a Mesoporous Metal–Organic Framework

Author: Dongxu Wang, Siqi Li, Chunhui Wu, Tao Li

Issue&Volume: January 7, 2022

Abstract: A rapid surface sealing strategy has been developed for the encapsulation of a homogeneous catalyst, phosphotungstic acid (PTA), in a mesoporous metal–organic framework (MOF), MIL-101(Cr). This new surface polymerization method utilizes non-solvent-induced phase separation to concentrate and direct polyamine and dianhydride monomers onto MOF particle surfaces, thus realizing the formation of a sub-10 nm, uniform, and cross-linked polymer coating within a few seconds. While fully preserving the catalytic activity of the neat PTA for the catalytic decomposition of phenol, the surface-sealed PTA-MOF composite catalyst can be reused up to 10 times with no noticeable loss of activity and negligible leaching of PTA. Since this surface coating method is not limited by either the MOF or the catalyst, it will become the technique of choice for the immobilization of homogeneous catalysts in MOFs.

DOI: 10.1021/jacs.1c11573

Source: https://pubs.acs.org/doi/10.1021/jacs.1c11573

 

期刊信息

JACS:《美国化学会志》,创刊于1879年。隶属于美国化学会,最新IF:14.612
官方网址:https://pubs.acs.org/journal/jacsat
投稿链接:https://acsparagonplus.acs.org/psweb/loginForm?code=1000