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Graft copolymer templated synthesis of mesoporous MgO/TiO₂ mixed oxide nanoparticles and their CO₂ adsorption capacities
- Jeon, Harim, Min, Yoon Jae, Ahn, Sung Hoon, Hong, Seok-Min, Shin, Jong-Shik, Kim, Jong Hak, Lee, Ki Bong
- Colloids and surfaces 2012 v.414 pp. 75-81
- X-ray diffraction, adsorption, carbon dioxide, colloids, composite polymers, desorption, magnesium oxide, nanoparticles, nitrogen, scanning electron microscopy, sol-gel processing, surface area, titanium dioxide, transmission electron microscopy, vinyl chloride
- Mesoporous mixed oxide nanoparticles consisting of MgO and TiO₂ were synthesized via a sol–gel process by templating poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) graft copolymer. The mesoporous structures and morphologies of the MgO/TiO₂ mixed oxides were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and nitrogen adsorption/desorption analysis. Interestingly, MgO/TiO₂ mixed oxide exhibited much higher CO₂ adsorption capacity (0.477mol CO₂/kg sorbent for 40:60 MgO/TiO₂) than pure MgO (0.074) or TiO₂ (0.063). This result arises from the increase in surface area and pore volume of the mixed oxide due to the formation of bimodal pores.