期刊
JOURNAL OF SAUDI CHEMICAL SOCIETY
卷 22, 期 3, 页码 343-351出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jscs.2016.05.004
关键词
Mesoporous silica; CO2 sequestration; Cu nanoparticles
资金
- King Abdulaziz City for Science and Technology (KACST) [592-32]
The CO2 sequestration is one of the most promising solutions to tackle global warming. In this study, spherical mesoporous silica particles (MPS-S) and rod-shaped mesoporous silica particles (MPS-R) loaded with Cu nanoparticles were selectively prepared and employed for CO2 adsorption. For the first time uniform Cu nanoparticles were incorporated into the rod-shaped mesoporous silica particles by post-synthesis modification using both N-[3-(trimethoxysilyl) pro pyl]ethylenediamine (PEDA) and ethylenediamine (EDA) as coupling agents. The physiochemical properties of the mesoporous and copper grifted silica composites were investigated by CHN elemental analysis, FTIR spectroscopy, thermogravimetric analysis, X-ray diffraction, energy dispersive X-ray spectroscopy (EDX), surface area analysis, scanning, transmission electron microscopy and gas analysis system (GSD 320, TERMO). The mesoporous silica shows highly ordered mesoporous structures, with the rod-shaped particles having a higher surface area than the spherical ones. Copper nanoparticles with an average diameter of 6.0 nm were uniformly incorporated into the MPS-S and MPS-R. Moreover, Cu-loaded mesoporous silica exhibits up to 40% higher CO2 adsorption capacity than the bare MPS. The MPS-R modified with Cu nanoparticles showed a maximum CO2 adsorption capacity of 0.62 mmol/g and the humidity showed a slight negative effect on CO2 uptake process. The enhancement of CO2 adsorption onto transition metal/mesoporous substrates provides basis for imminent CO2 sequestration. (C) 2016 King Saud University. Production and hosting by Elsevier B.V.
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