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Colloids Interfaces 2018, 2(3), 25; https://doi.org/10.3390/colloids2030025

CO2 Adsorption Property of Amine-Modified Amorphous TiO2 Nanoparticles with a High Surface Area

Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan
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Received: 23 May 2018 / Revised: 28 June 2018 / Accepted: 3 July 2018 / Published: 5 July 2018
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Abstract

Carbon dioxide capture and storage (CCS) technologies have attracted a great deal of attention as effective measures to prevent global warming. Adsorption methods using porous materials seem to have several advantages over the liquid absorption methods. In this study, we have developed a synthesis method of new amorphous titanium dioxide (TiO2) nanoparticles with a diameter of 3 nm, a high surface area of 617 m2/g and a large amount of OH groups. Next, the surface of the amorphous TiO2 nanoparticles was modified using ethylenediamine to examine whether CO2 adsorption increases. Amorphous TiO2 nanoparticles were successfully modified with ethylenediamine, which was used in excess due to the presence of a large amount of hydroxyl groups. The amorphous TiO2 nanoparticles modified with ethylenediamine show a higher CO2 adsorption capacity (65 cm3/g at 0 °C, 100 kPa) than conventional TiO2 and mesoporous SiO2. We discuss the origin of the higher CO2 adsorption capacity in terms of the high specific surface area of the amorphous TiO2 nanoparticles and the modification with ethylenediamine on the surface of the amorphous TiO2 nanoparticles. The optimization of the amount of ethylenediamine bound on the particles increased the CO2 adsorption capacity without pore blocking. View Full-Text
Keywords: titanium dioxide; amorphous; nanoparticles; ethylenediamine modification; CO2 adsorption titanium dioxide; amorphous; nanoparticles; ethylenediamine modification; CO2 adsorption
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Ota, M.; Hirota, Y.; Uchida, Y.; Nishiyama, N. CO2 Adsorption Property of Amine-Modified Amorphous TiO2 Nanoparticles with a High Surface Area. Colloids Interfaces 2018, 2, 25.

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