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Titolo:
On the formation of vertically oriented MCM-22 zeolite crystal films
Autore:
Cheng, M; Hu, G; Tan, D; Bao, X;
Indirizzi:
Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China Chinese Acad Sci Dalian Peoples R China 116023 n 116023, Peoples R China
Titolo Testata:
MICROPOROUS AND MESOPOROUS MATERIALS
fascicolo: 1, volume: 50, anno: 2001,
pagine: 69 - 76
SICI:
1387-1811(200112)50:1<69:OTFOVO>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR-SIEVE CRYSTALS; IN-SITU CRYSTALLIZATION; GROWTH; MEMBRANE;
Keywords:
MCM-22; MWW; zeolite film; zeolite membrane; oriented growth;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Bao, X Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China Chinese Acad Sci 457 Zhongshan Rd Dalian Peoples R China 116023 na
Citazione:
M. Cheng et al., "On the formation of vertically oriented MCM-22 zeolite crystal films", MICROP M M, 50(1), 2001, pp. 69-76

Abstract

Growth of MCM-22 zeolite films on glass substrates was studied with the focus on the understanding of the unusual vertical crystal orientation. The films formed were characterized by scanning electron microscopy and X-ray diffraction. Separate thin disk-like MCM-22 crystals were found vertically oriented at the early crystallization stage. With crystallization the crystals grew into thick disks and finally into continuous films. The vertically oriented MCM-22 thin crystals could be developed from the orientation of columnar MCM-22 nuclei, which have larger parameters in their c-directions than those in a and b directions. The preferred orientation of MCM-22 nuclei and the fast growth rate in the layer direction are responsible for the vertical growth of MCM-22 zeolite films. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 16:08:32