Synthesis of AlPO4-type Mesoporous Materials Using Alum Sludge

Alum 슬러지를 이용한 AlPO4-계 다공성 물질의 합성

  • Kang, Kwang Cheol (Green Home Energy Technology Research Center, Kongju National University) ;
  • Kim, Young Ho (Department of Chemistry, Kongju National University) ;
  • Kim, Jin-man (Department of Architecture, Kongju National University) ;
  • Lee, Choul Ho (Department of Chemical Engineering, Kongju National University) ;
  • Rhee, Seog Woo (Green Home Energy Technology Research Center, Kongju National University)
  • 강광철 (공주대학교 그린홈에너지기술연구소) ;
  • 김용호 (공주대학교 화학과) ;
  • 김진만 (공주대학교 건축학부) ;
  • 이철호 (공주대학교 화학공학부) ;
  • 이석우 (공주대학교 그린홈에너지기술연구소)
  • Received : 2010.12.06
  • Accepted : 2011.01.17
  • Published : 2011.04.10

Abstract

In this study, the formation of $AlPO_4$-type porous materials from alum sludge was investigated. The materials were synthesized by the reaction of aluminum hydroxide and phosphoric acid with an organic template. Cationic surfactant, natural humic acid, and amino acids were used for the organic template. The residual organic templates were removed by calcination at $600^{\circ}C$ in the air. Powder X-ray diffraction patterns showed the charicteristic patterns of the $AlPO_4$-type porous materials. The morphology of the material was examined using a scanning electron microscopy. The coordination environment of $Al^{3+}$ ion was investigated by $^{27}Al$ MAS NMR technique. Both tetrahedrally and octahedrally coordinated$Al^{3+}$ ions were found in the as-synthesized samples while all $Al^{3+}$ ions were tetrahedrally coordinated in the calcined products. The development of mesopore in the solid material was confirmed by the measurement of BET specific surface area. Finally, they were used for removal of toxic formaldehyde from the air and the formaldehyde molecules were adsorbed on the surface of pores. In conclusion, $AlPO_4$-type porous materials from alum sludge might be applicable in the removal of toxic volatile organic compounds from the air.

Acknowledgement

Supported by : 한국연구재단, 중소기업청

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