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Citation: LUO Xiao-Lin, CHEN Ya-Shao, CHANG Peng-Mei, YANG De-Suo, JIANG Luan. Synthesis of SAPO-11 Molecular Sieve Microspheres Using a Microwave Technique and Mediated by Ionic Micelles[J]. Acta Physico-Chimica Sinica, ;2009, 25(01): 137-144. doi: 10.3866/PKU.WHXB20090125 shu

Synthesis of SAPO-11 Molecular Sieve Microspheres Using a Microwave Technique and Mediated by Ionic Micelles

1.
Department of Chemistry and Chemistry Engineering, Baoji University of Arts and Sciences, Baoji 721013, Shaanxi Province, P. R. China; Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Materials Science, Shaanxi Normal University, Xi’an 710062, P. R. China

Received Date: 3 July 2008
Available Online: 12 November 2008

Micelles formed by cetyltrimethylammoniumchlorine (CTAC) and n-butanol were used as shape-directing templates to synthesize SAPO-11 molecular sieve microspheres by a microwave technique. Effects of CTAC concentration, time of crystallization, and dosage of HF were investigated. Properties of the products were characterized systematically by X-ray powder diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), thermal analysis (TG-DTA), electron diffraction spectroscopy (EDS) and N2 physisorption. When c(CTAC)+c(n-butanol)=0.180 mol·L-1, SAPO-11 molecular sieve microspheres with the preferred crystallinity were obtained. The crystallinity of the synthesized SAPO-11 molecular sieve microspheres was improved by prolonging the reaction time. The substitution of Si species and the crystallization of SAPO-11 molecular sieve microspheres were also improved by appropriate usage of HF. Using control experiments, the reaction mechanism for the crystallization of SAPO-11 molecular sieve microspheres as mediated by ionic micelles and using the microwave technique is proposed.
- Micelle; SAPO-11 molecular sieve; Microsphere; Microwave synthesis
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