Room-temperature synthesis of bimetallic Co-Zn based zeolitic imidazolate frameworks in water for enhanced CO2 and H2 uptakes

被引:184
作者
Kaur, Gurpreet [1 ]
Rai, Rohit K. [1 ]
Tyagi, Deepika [1 ]
Yao, Xin [2 ]
Li, Pei-Zhou [2 ]
Yang, Xin-Chun [3 ]
Zhao, Yanli [2 ]
Xu, Qiang [3 ]
Singh, Sanjay K. [1 ,4 ]
机构
[1] Indian Inst Technol IIT Indore, Discipline Chem, Indore 453552, India
[2] Nanyang Technol Univ, Sch Phys & Math Sci, Div Chem & Biol Chem, 21 Nanyang Link, Singapore 637371, Singapore
[3] Natl Inst Adv Ind Sci & Technol, Ikeda, Osaka 5638577, Japan
[4] Indian Inst Technol IIT Indore, Discipline Met Engn & Mat Sci, Indore 453552, India
关键词
METAL-ORGANIC FRAMEWORK; GAS-ADSORPTION; ZIF-8; EFFICIENT; COBALT; MOF-5; CONVERSION; NANOFIBERS; OXIDATION; CATALYSTS;
D O I
10.1039/c6ta04342a
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A simplemethodology was explored to access highly robust bimetallic Co-Zn based zeolitic imidazolate frameworks at room temperature. By tuning the content of Co and Zn precursors, CoZn-ZIF-8 frameworks with varying Co : Zn (25-90% of Co2+ as confirmed by ICP-AES results) were synthesized. Electron micrographs and powder X-ray diffraction (PXRD) patterns confirmed the formation of bimetallic CoZn-ZIF-8 frameworks of 150-300 nm size, where Zn atoms were partially replaced by Co atoms. The as-synthesized CoZn-ZIF-8 frameworks displayed a tuned pore size, pore volume and surface area, with the highest surface area (enhanced by similar to 40% compared to Zn-ZIF-8) and pore volume (enhanced by similar to 33% compared to Zn-ZIF-8) for Co75Zn25-ZIF-8. The as-synthesized CoZn-ZIF-8 frameworks also displayed enhanced CO2 and H-2 uptakes at 298 K and 77 K, respectively, at 1 bar. Noteworthy enhancement of similar to 30% in the CO2 and similar to 23% in the H-2 uptake was displayed by Co75Zn25-ZIF-8 frameworks as compared to Zn-ZIF-8 under analogous conditions.
引用
收藏
页码:14932 / 14938
页数:7
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