Graft copolymer templated synthesis of mesoporous MgO/TiO 2 mixed oxide nanoparticles and their CO 2 adsorption capacities

Harim Jeon, Yoon Jae Min, Sung Hoon Ahn, Seok Min Hong, Jong Shik Shin, Jong Hak Kim, Ki Bong Lee

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Mesoporous mixed oxide nanoparticles consisting of MgO and TiO 2 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/TiO 2 mixed oxides were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and nitrogen adsorption/desorption analysis. Interestingly, MgO/TiO 2 mixed oxide exhibited much higher CO 2 adsorption capacity (0.477mol CO 2/kg sorbent for 40:60 MgO/TiO 2) than pure MgO (0.074) or TiO 2 (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.

Original languageEnglish
Pages (from-to)75-81
Number of pages7
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume414
DOIs
Publication statusPublished - 2012 Nov 20

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Keywords

  • CO adsorption
  • Graft copolymer
  • Magnesium oxide
  • Porous material
  • Sol-gel process
  • Titanium oxide

ASJC Scopus subject areas

  • Colloid and Surface Chemistry

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