Water-bathing synthesis of high-surface-area zeolite P from diatomite--颗粒学报PARTICUOLOGY

Du, Y., Shi, S., & Dai, H. (2011). Water-bathing synthesis of high-surface-area zeolite P from diatomite. Particuology, 9(2), 174-178. https://doi.org/10.1016/j.partic.2010.06.006

Water-bathing synthesis of high-surface-area zeolite P from diatomite

Yucheng Du ^a *, Shuli Shi ^a, Hongxing Dai ^b

a Key Lab of Advanced Functional Materials, Ministry of Education, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
b Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

10.1016/j.partic.2010.06.006

Volume 9, Issue 2, April 2011, Pages 174-178

Received 3 April 2010, Revised 22 May 2010, Accepted 2 June 2010, Available online 12 January 2011.

E-mail: ychengdu@bjut.edu.cn

Highlights

Abstract

Zeolite P was synthesized for the first time via a novel water-bathing route at 90 °C using scrubbed diatomite, sodium hydroxide, and aluminum hydroxide as precursor, with SiO₂/Al₂O₃, SiO₂/Na₂O, and H₂O/Na₂O molar ratios of 7.43, 3.81, and 80.00, respectively. The as-fabricated samples were characterized by means of scanning electron microscopy, X-ray diffraction, and nitrogen adsorption measurements. This study showed that (i) treating the diatomite raw material with sodium hexametaphosphate could open the pores in the diatomite via removal of the clay clogged in its pores; (ii) tetragonal mesoporous zeolite P samples with a surface area of 56–60 m²/g could be generated after 6–24 h of water-bathing reaction at 90 °C; (iii) extension of water-bathing reaction time could improve the mesoporous structure of zeolite P; and (iv) Ca²⁺ adsorption capacity of the zeolite P sample was about 300 cmol/kg. Such high-surface-area porous zeolite P could be used as an effective adsorbent for the treatment of water containing calcium and magnesium ions.

Graphical abstract

Keywords

Diatomite; Water-bathing synthesis method; Zeolite P

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