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Journal of Inorganic Materials

Journal of Inorganic Materials >

2009 , Vol. 24 >Issue 5: 1003 - 1007

DOI: https://doi.org/10.3724/SP.J.1077.2009.01003

Research Paper

Surfactant Assisted Hydrothermal and Thermaldecomposition Synthesis
of Alumina Microfibers with Mesoporous Structures

  • ZHU Zhen-Feng ,
  • SUN Hong-Jun ,
  • LIU Hui ,
  • YANG Dong ,
  • ZHANG Jian-Quan ,
  • GUO Li-Ying
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  • (School of Materials Science and Engineering, University of Science and Technology, Xi’an 710021, China)

Received date: 2009-01-13

  Revised date: 2009-04-20

  Online published: 2009-09-20

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Abstract

Using template PEG as structure directing agent and urea as the precipitant, alumina microfibers with mesoporous structures were successfully synthesized from a hydrothermal preparation and thermal-decomposition of precursor of ammonium aluminum carbonate hydroxide (denoted as AACH), and its adsorbability was also investigated. The phase state, chemical structure, surface morphology, special surface areas and mesoporous structure of the synthesized alumina microfibers were characterized systemically by means of XRD, SEM, TEM, TG/DTA, and N2 adsoption-desoption techniques, respectively. The adsorptive property of the obtained mesoporous alumina fibers was examined by using a typical SCR(Selective Catalytic Reduction) denitrification facility. The results show that the AACH microfibers with diameter of about 200-300nm and length up to 8μm or 10μm are prepared by using PEG as template. The mesoporous η-Alumina microfibers with specific surface area 316m2/g and average pore diameter 2.5nm are obtained after calcined at 900℃ for 2h, and the morphology is retained in the calcination process. SCR denitrification tests show that the as-prepared mesoporous alumina microfibers exhibit more favorable adsorptive property and its efficiency of denitrification increases approximately 15% compared with commercial γ-Al2O3 powder.

Key words： alumina; porous microfibers; hydrothermal and thermal-decomposition synthesis; surfactant assisted; adsorbability

Cite this article

ZHU Zhen-Feng , SUN Hong-Jun , LIU Hui , YANG Dong , ZHANG Jian-Quan , GUO Li-Ying . Surfactant Assisted Hydrothermal and Thermaldecomposition Synthesis
of Alumina Microfibers with Mesoporous Structures[J]. Journal of Inorganic Materials, 2009 , 24(5) : 1003 -1007 . DOI: 10.3724/SP.J.1077.2009.01003

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