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21-P-06-Fabrication of hollow fibers and spheres composed of zeolites by layer-by-layer adsorption method
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21 - Nanocomposite Fundamentals and Applications (Wednesday) 21-P-06- Fabrication of hollow fibers and spheres composed of zeolites by layer-by-layer adsorption method Y. Tang (a), Y.-J. Wang (a), X.-D. Wang (a), W.-L. Yang (b)and Z. Gao (a)
a Department of Chemistry, Fudan University, Shanghai 200433, China, yitang@)Cudan.edu.cn b Department of Macromolecular Science, Fudan University, Shanghai 200433, China Hollow fibers and spheres of zeolite (labeled as HFZ and HSZ, respectively) were successfully fabricated using carbon fibers and polystyrene (PS) spheres as templates respectively, through layer-by-layer technique, coupled with removal of the templates by calcination. The optimum performance conditions to obtain these kinds of materials were systematically studied. The wall thickness and composition of these novel materials can be readily tailored by varying the number of nanozeolite/PDDA (poly(diallyldimethyl ammonium chloride)) deposition cycles and zeolite type used, respectively. The properties of these novel materials were characterized by means of XRD, IR and SEM.
21-P-07- The zeolitisation of diatoms to create hierarchical pore structures S.M. Holmes(a), R.J. Plaisted(b), P. Crow(b), P. Foran(b), C.S. Cundy(b) and M.W. Anderson(b)
a Environmental Technology Centre, Chemical Engineering Dept. UMIST, Sackville Street, Manchester, M60 1QD, UK. e-mail." [email protected], fax: +44 161 2004399 b UMIST Centre for Microporous Materials, Sackville Street, Manchester, M60 1QD, UK. The synthesis of a hierarchical pore structure, combining the macroporous diatomaceous earth with microporous zeolites, is reported. Diatomaceous earth is an abundant and varied source of macroporous silica which has been 'zeolitisatised' to produce a bifunctional, hierarchical composite. A range of different zeolites have been synthesised to generate different pore architectures, hydrophobic/hydrophilic materials and ion-exchange/catalytic properties.
21-P-08 - Generating the narrowest single-walled carbon nanotubes in the channels of AIPO4-5 single crystals G.D. Li (a,b), Z.K. Tang (b), N. Wang (b), K.H. Wong (b) and J.-S. Chen* (a)
a Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, [email protected], edu. cn, Changchun, P. R. China b Department of Physics, HKUST, Hong Kong, P. R. China The pyrolysis of tripropylamine trapped in the framework structure of A1PO4-5 (AFI) single crystal results in the formation of the narrowest single-walled carbon nanotubes. The diameter of the nanotubes, which are stable enough when located in the AFI channels, is 0.42+0.02 nm. As the nanotubes are strictly aligned in the one-dimensional channels, the AFI crystal containing the tubes shows distinct anisotropic property. The growing process of the nanotubes was monitored by polarized optical microscopy. It has been found that the optimal temperature range for the growth of the nanotubes in A1PO4-5 single crystals is 773-873 K.
21 - Nanocomposite Fundamentals and Applications (Wednesday) 21-P-06- Fabrication of hollow fibers and spheres composed of zeolites by layer-by-layer adsorption method Y. Tang (a), Y.-J. Wang (a), X.-D. Wang (a), W.-L. Yang (b)and Z. Gao (a)
a Department of Chemistry, Fudan University, Shanghai 200433, China, yitang@)Cudan.edu.cn b Department of Macromolecular Science, Fudan University, Shanghai 200433, China Hollow fibers and spheres of zeolite (labeled as HFZ and HSZ, respectively) were successfully fabricated using carbon fibers and polystyrene (PS) spheres as templates respectively, through layer-by-layer technique, coupled with removal of the templates by calcination. The optimum performance conditions to obtain these kinds of materials were systematically studied. The wall thickness and composition of these novel materials can be readily tailored by varying the number of nanozeolite/PDDA (poly(diallyldimethyl ammonium chloride)) deposition cycles and zeolite type used, respectively. The properties of these novel materials were characterized by means of XRD, IR and SEM.
21-P-07- The zeolitisation of diatoms to create hierarchical pore structures S.M. Holmes(a), R.J. Plaisted(b), P. Crow(b), P. Foran(b), C.S. Cundy(b) and M.W. Anderson(b)
a Environmental Technology Centre, Chemical Engineering Dept. UMIST, Sackville Street, Manchester, M60 1QD, UK. e-mail." [email protected], fax: +44 161 2004399 b UMIST Centre for Microporous Materials, Sackville Street, Manchester, M60 1QD, UK. The synthesis of a hierarchical pore structure, combining the macroporous diatomaceous earth with microporous zeolites, is reported. Diatomaceous earth is an abundant and varied source of macroporous silica which has been 'zeolitisatised' to produce a bifunctional, hierarchical composite. A range of different zeolites have been synthesised to generate different pore architectures, hydrophobic/hydrophilic materials and ion-exchange/catalytic properties.
21-P-08 - Generating the narrowest single-walled carbon nanotubes in the channels of AIPO4-5 single crystals G.D. Li (a,b), Z.K. Tang (b), N. Wang (b), K.H. Wong (b) and J.-S. Chen* (a)
a Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, [email protected], edu. cn, Changchun, P. R. China b Department of Physics, HKUST, Hong Kong, P. R. China The pyrolysis of tripropylamine trapped in the framework structure of A1PO4-5 (AFI) single crystal results in the formation of the narrowest single-walled carbon nanotubes. The diameter of the nanotubes, which are stable enough when located in the AFI channels, is 0.42+0.02 nm. As the nanotubes are strictly aligned in the one-dimensional channels, the AFI crystal containing the tubes shows distinct anisotropic property. The growing process of the nanotubes was monitored by polarized optical microscopy. It has been found that the optimal temperature range for the growth of the nanotubes in A1PO4-5 single crystals is 773-873 K.