Journal
MATERIALS LETTERS
Volume 228, Issue -, Pages 61-64Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2018.05.118
Keywords
SAPO-11; Silicoaluminophosphate; Ethanol medium; Crystal morphology; Porous materials; Texture
Funding
- Ministry of Education and Science of the Russian Federation [RFMEFI60417X0159]
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Silicoaluminophosphate-11 (SAPO-11) crystals were synthesized in different media - water and ethanol - by the two-stage hydrothermal method using ultrasonic pretreatment of precursor mixture. Changing of the synthesis medium from water to ethanol leads to transformation of SAPO-11 morphology: from pseudo-spherical aggregative crystals to novel screw-like morphology. SAPO-11 crystals, synthesized in ethanol medium (Et-SAPO-11), have remarkable textural properties: the greater values of BET surface area and micropore/mesopores volume, compared with crystals, obtained in the water medium (W-SAPO-11). Besides, the acidity of Et-SAPO-11 is lower than that of W-SAPO-11 due to hindered incorporation of silicon into aluminophosphate lattice in ethanol medium. (C) 2018 Elsevier B.V. All rights reserved.
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