Defective NH2-UiO-66 (Zr) effectively converting CO2 into cyclic carbonate under ambient pressure, solvent-free and co-catalyst-free conditions
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Defective NH2-UiO-66 (Zr) effectively converting CO2 into cyclic carbonate under ambient pressure, solvent-free and co-catalyst-free conditions
Defective NH2-UiO-66 (Zr) effectively converting CO2 into cyclic carbonate under ambient pressure, solvent-free and co-catalyst-free conditions
中国化学工程学报(英文版)2022年43卷第3期 页码:222-229
Affiliations:
School of Chemistry and Chemical Engineering, Hefei University of Technology, Anhui Key Laboratory of Controllable Chemical Reaction & Material Chemical Engineering,Hefei,China,230009
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纸质出版:2022
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Xueting Liu, Chunhui Hu, Jingjing Wu, 等. Defective NH2-UiO-66 (Zr) effectively converting CO2 into cyclic carbonate under ambient pressure, solvent-free and co-catalyst-free conditions[J]. 中国化学工程学报(英文版), 2022,43(3):222-229.
-UiO-66 (Zr) effectively converting CO
Xueting Liu, Chunhui Hu, Jingjing Wu, 等. Defective NH2-UiO-66 (Zr) effectively converting CO2 into cyclic carbonate under ambient pressure, solvent-free and co-catalyst-free conditions[J]. 中国化学工程学报(英文版), 2022,43(3):222-229.DOI:
-UiO-66 (Zr) effectively converting CODOI:
Defective NH2-UiO-66 (Zr) effectively converting CO2 into cyclic carbonate under ambient pressure, solvent-free and co-catalyst-free conditions
HAc catalysts were synthesized by solvothermal method using acetic acid (HAc) as a modulator
and were applied to the cycloaddition of CO
2
and epichlorohydrin (EPIC) under ambient pressure. Influences of the modulation by HAc on morphologies and structures of the MOFs are demonstrated
via
PXRD
FESEM
FTIR
N
2
adsorption–desorption
XPS and
1
H NMR characterizations. The results show that the MOFs containing mesoporous pores can be prepared by adjusting the concentration of HAc. By optimizing the amount of HAc added
the specific surface area of NH
2
-UiO-66-8HAc is as high as 879.17 m
2
·g
-1
which is 28.3% higher than that of the original MOFs. And the evaluation of catalytic performance showed that HAc modulation enhanced the activity of NH
2
-UiO-66-
x
HAc under mild conditions. The exposure of Lewis acid sites
increased specific surface area and porosity
via
the modulation of HAc defective ligand can be supposed the key factors to determine the enhanced catalytic activities. In addition
considering the influence of gas concentration on the reaction
the concept of TOP (Turnover of Pressure
defined as the mass of conversions of a unit mass catalyst under unit pressure and unit time) was first proposed in this article.
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