Mesoporous aluminosilicate ropes with improved stability from protozeolitic nanoclusters

Journal Article · Thu Feb 15 00:00:00 EST 2007 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2006.11.017· OSTI ID:21015684

Junlin, Zheng ^[1]; Dejin, Kong ^[1]; Weimin, Yang ^[1]; Zaiku, Xie ^[1]; Dong, Wu ^[2]

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1. Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208 (China)
2. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001 (China)

Mesoporous aluminosilicate ropes with improved hydrothermal stability have been prepared through S{sup +}X{sup -}I{sup +} route via self-assembly of protozeolitic nanoclusters with cetyltrimethylammonium bromides (CTAB) template micelles in HNO{sub 3} solution. SEM observation confirmed that high-yield aluminosilicate ropes could be produced under proper HNO{sub 3} concentration. NO{sub 3} {sup -} ions had strong binding strength to the CTA{sup +} ions and tended to form more elongated surfactant micelles, thus fibrous products were fabricated under the direction of these long rod micelles in shearing flow. At the same time, the NO{sub 3} {sup -} ions combining with CTA{sup +} ions generated more active (CTA{sup +}NO{sub 3} {sup -}) assembly, which effectively catalysed the polymerization of protozeolitic nanoclusters with large volume into highly ordered mesostructures. Compared with normal MCM-41 silica synthesized through S{sup +}X{sup -}I{sup +} route in acidic media, the hydrothermal stability was improved considerably. These protozeolitic nanoclusters survived strongly acidic media and entered into mesostructured framework, which contributed to the improvement of hydrothermal stability. - Graphical abstract: Mesoporous aluminosilicate ropes with enhanced hydrothermal stability were fabricated from protozeolitic nanoclusters through S{sup +}X{sup -}I{sup +} route in HNO{sub 3} solution under the direction of CTAB templates.

• OSTI ID: 21015684
• Journal Information: Journal of Solid State Chemistry, Vol. 180, Issue 2; Other Information: DOI: 10.1016/j.jssc.2006.11.017; PII: S0022-4596(06)00598-6; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BROMIDES
NANOSTRUCTURES
NITRATES
NITRIC ACID
NITROGEN OXIDES
POLYMERIZATION
SCANNING ELECTRON MICROSCOPY
SILICA
STABILITY
ZEOLITES