화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.22, No.2, 173-177, April, 2011
Export Citation
Alum 슬러지를 이용한 AlPO4-계 다공성 물질의 합성
Synthesis of AlPO4-type Mesoporous Materials Using Alum Sludge
강광철1, 김용호2, 김진만3, 이철호4, 이석우1, 2, †
  • 1공주대학교 그린홈에너지기술연구소
  • 2공주대학교 화학과
  • 3공주대학교 건축학부
  • 4공주대학교 화학공학부
Kwang Cheol Kang1, Young Ho Kim2, Jin-man Kim3, Choul Ho Lee4, and Seog Woo Rhee1, 2, †
  • 1Green Home Energy Technology Research Center, Kongju National University, Cheonan 330-717, Korea
  • 2Department of Chemistry, Kongju National University, Kongju 314-701, Korea
  • 3Department of Architecture, Kongju National University, Cheonan 330-717, Korea
  • 4Department of Chemical Engineering, Kongju National University, Cheonan 330-717, Korea
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초록
본 연구에서는 정수장의 alum 슬러지로부터 AlPO4-계 다공성 물질의 합성과정을 규명하고자 가정용 세제, 휴믹산, 아미노산 등과 같은 유기물질을 틀로 사용하여 Al(OH)3과 인산으로부터 AlPO4-계 다공성 물질을 합성하였으며, 600 ℃의 공기 중에서 소성을 통하여 틀로 사용한 유기물질을 제거하였다. X-선 회절 분석 결과 합성된 물질은 AlPO4-계 다공성 물질의 특징적인 패턴을 나타내었으며, 물질의 형태적인 특성은 주사전자현미경을 이용하여 관찰하였다. 27Al MAS NMR 분석을 통하여 Al3+ 이온 주변의 화학적 배위환경의 변화를 관찰하였다. 소성 전 물질에는 4배위와 6배위된 Al3+ 이온이 함께 존재하지만, 소성 후 물질에서 Al3+ 이온은 모두 4배위 환경에 존재하였다. 합성된 고체 내부에 형성된 기공은 BET 비표면적 측정으로 확인하였다. 최종적으로 합성된 물질의 응용으로 공기 중 유해 포름알데히드 제거 실험을 실시하였으며, 포름알데히드 분자가 물질에 존재하는 기공 표면에 흡착됨을 확인하였다. 결론적으로, alum 슬러지로부터 얻어진 AlPO4-계 다공성 재료를 유해 기체의 흡착 및 제거에 활용할 수 있는 가능성을 제시하였다.
In this study, the formation of AlPO4-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 ℃ in the air. Powder X-ray diffraction patterns showed the charicteristic patterns of the AlPO4-type porous materials. The morphology of the material was examined using a scanning electron microscopy. The coordination environment of Al3+ ion was investigated by 27Al MAS NMR technique. Both tetrahedrally and octahedrally coordinated Al3+ ions were found in the as-synthesized samples while all Al3+ 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, AlPO4-type porous materials from alum sludge might be applicable in the removal of toxic volatile organic compounds from the air.
Keywords:alum sludge;AlPO4;mesoporous materials;surfactant;humic acid
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