A novel water-stable MOF Zn(Py)(Atz) as heterogeneous catalyst for chemical conversion of CO2 with various epoxides under mild conditions

被引:81
作者
Lan, Jianwen [1 ]
Qu, Ye [1 ]
Zhang, Xiao [1 ]
Ma, Haoran [2 ]
Xu, Ping [1 ]
Sun, Jianmin [1 ]
机构
[1] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, MIIT Key Lab Crit Mat Technol New Energy Convers, Sch Chem & Chem Engn, Harbin 150080, Heilongjiang, Peoples R China
[2] Harbin 3 High Sch, Harbin, Heilongjiang, Peoples R China
基金
中国国家自然科学基金;
关键词
CO2 chemical conversion; Various epoxides; Mild conditions; Heterogeneous catalyst; Water stability; METAL-ORGANIC FRAMEWORK; CYCLIC CARBONATES; CYCLOADDITION; ADSORPTION; FIXATION; STABILITY; ACYLAMIDE; PROPERTY;
D O I
10.1016/j.jcou.2019.09.019
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A novel Zn-based three-dimensional framework Zn-2(Py)(Atz)(2)center dot DMF center dot 2H(2)O (H2Py = 3,5-Pyridinedicarboxylic acid, Hatz = 3-Amino-1,2,4-triazole) abbreviated as Zn(Py)(Atz), with micropores and outstanding stability, was facilely fabricated by employing mixed ligands of nitro-rich unit amitrole and 3,5-dipicolinic acid. The Zn site acted as Lewis acid for epoxides activation, abundant micropores (BET surface area 764.5 m(2)/g, pore volume 0.32 cm(3)/g) and nitro-rich unit facilitated CO2 sorption and its activation. The acid-base synergistic effects of Zn (Py)(Atz) MOF catalyst resulted in its promising potential in CO2 chemical conversion. Satisfactorily, Zn(Py) (Atz) exhibited decent CO2 sorption capacity (52.3 cm(3)/g at 273 K) and good performance of 92.1% propylene carbonate yield and 98% selectivity for the CO2 cycloaddition to propylene oxide under mild conditions (60 degrees C 1.5 MPa), also high cyclic carbonates yields and selectivities were obtained over various epoxides. Moreover, PXRD analysis confirmed the excellent stability of Zn(Py)(Atz) in distilled water ( > 1 week) and acid/or base aqueous solution (pH = 2-14 for 72 h), which could meet the demand of industrial environment. Additionally, the Zn(Py)(Atz) catalyst was completely recycled for seven times with little decrease in product yield. The efficient, highly stable, easily recycle and solvent-free catalyst reported herein is potential material in CO2 capture and utilization.
引用
收藏
页码:216 / 224
页数:9
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