Journal
NANOMATERIALS
Volume 12, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/nano12010127
Keywords
layered double hydroxide; Cu2+; amine modification; carbon dioxide; capture; photocatalytic conversion
Categories
Funding
- Open Project Program of the State Key Laboratory of Chemical Engineering [SKL-ChE-11A02]
- Zhejiang Provincial Natural Science Foundation of China [LY16B060014]
- lateral project of Zhejiang University of Technology [HG-[2016]051]
Ask authors/readers for more resources
Cu-Mg-Al layered double hydroxides (LDHs) with amine modification were prepared, and the effects of Cu2+ content on their surface morphology and CO2 adsorption were investigated. The results showed that appropriate Cu2+ content improved the adsorption capacity, and the materials could also be used for photocatalytic reduction of CO2.
Cu-Mg-Al layered double hydroxides (LDHs) with amine modification were prepared by an organic combination of an anionic surfactant-mediated method and an ultrasonic spalling method using N-aminoethyl-gamma-aminopropyltrimethoxysilane as a grafting agent. The materials were characterized by elemental analysis, XRD, SEM, FTIR, TGA, and XPS. The effects of the Cu2+ content on the surface morphology and the CO2 adsorption of Cu-Mg-Al LDHs were investigated, and the kinetics of the CO2 adsorption and the photocatalytic reduction of CO2 were further analyzed. The results indicated that the amine-modified method and appropriate Cu2+ contents can improve the surface morphology, the increase amine loading and the free-amino functional groups of the materials, which were beneficial to CO2 capture and adsorption. The CO2 adsorption capacity of Cu-Mg-Al N was 1.82 mmol center dot g(-1) at 30 degrees C and a 0.1 MPa pure CO2 atmosphere. The kinetic model confirmed that CO2 adsorption was governed by both the physical and chemical adsorption, which could be enhanced with the increase of the Cu2+ content. The chemical adsorption was suppressed, when the Cu2+ content was too high. Cu-Mg-Al N can photocatalytically reduce CO2 to methanol with Cu2+ as an active site, which can significantly improve the CO2 adsorption and photocatalytic conversion.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available