caa a22 4500 463252691 CHVBK 20180405153345.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s10562-007-9053-5 doi (NATIONALLICENCE)springer-10.1007/s10562-007-9053-5 Silica nanoboxes from alumina rich zeolites: thermal and chemical stability of the monomodal and bimodal materials [Elektronische Daten] [R. Le van Mao, L. Lu, N. Vu, Q. Zhao, H. Yan, N. Al-yassir] Silica nanoboxes synthesized from alumina-rich zeolites, showed two distinct categories of nano-structured materials. Entirely mesoporous nanoboxes (monomodal Al-nanoboxes) were highly thermally and chemically resistant even in the acidic form whereas calcination at high temperature of materials still containing some zeolite remnants (bimodal Al-nanoboxes), resulted in dramatic loss of surface area and pore volume. Pore closure by mobile and amorphous aluminic species was believed to occur. The high thermal and chemical stability of the monomodal Al-nanoboxes was found to be related to the highly siliceous character of the mesopore walls which contained isolated tetrahedral Al atoms linked to tetrahedral Si atoms. Treatment of the acid form of the bimodal nanoboxes with La or Ce containing solutions resulted in quite thermally stable materials owing to the reduction of the number of protonic sites by the rare-earth metal ions. Springer Science+Business Media, LLC, 2007 silica nanoboxes from Al-rich zeolites nationallicence thermal stability nationallicence monomodal nationallicence bimodal pore size distribution nationallicence structure of the cavity walls nationallicence Le van Mao R. Industrial Catalysis Laboratory, Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke West, SP 275-09, H4B 1R6, Montreal, Quebec, Canada aut Lu L. Industrial Catalysis Laboratory, Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke West, SP 275-09, H4B 1R6, Montreal, Quebec, Canada aut Vu N. Industrial Catalysis Laboratory, Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke West, SP 275-09, H4B 1R6, Montreal, Quebec, Canada aut Zhao Q. Industrial Catalysis Laboratory, Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke West, SP 275-09, H4B 1R6, Montreal, Quebec, Canada aut Yan H. Industrial Catalysis Laboratory, Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke West, SP 275-09, H4B 1R6, Montreal, Quebec, Canada aut Al-yassir N. Industrial Catalysis Laboratory, Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke West, SP 275-09, H4B 1R6, Montreal, Quebec, Canada aut Catalysis Letters Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 114/3-4(2007-04-01), 129-134 1011-372X 114:3-4<129 2007 114 10562 https://doi.org/10.1007/s10562-007-9053-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9053-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Le van Mao R. Industrial Catalysis Laboratory, Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke West, SP 275-09, H4B 1R6, Montreal, Quebec, Canada aut NATIONALLICENCE 700 1- Lu L. Industrial Catalysis Laboratory, Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke West, SP 275-09, H4B 1R6, Montreal, Quebec, Canada aut NATIONALLICENCE 700 1- Vu N. Industrial Catalysis Laboratory, Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke West, SP 275-09, H4B 1R6, Montreal, Quebec, Canada aut NATIONALLICENCE 700 1- Zhao Q. Industrial Catalysis Laboratory, Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke West, SP 275-09, H4B 1R6, Montreal, Quebec, Canada aut NATIONALLICENCE 700 1- Yan H. Industrial Catalysis Laboratory, Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke West, SP 275-09, H4B 1R6, Montreal, Quebec, Canada aut NATIONALLICENCE 700 1- Al-yassir N. Industrial Catalysis Laboratory, Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke West, SP 275-09, H4B 1R6, Montreal, Quebec, Canada aut NATIONALLICENCE 773 0- Catalysis Letters Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 114/3-4(2007-04-01), 129-134 1011-372X 114:3-4<129 2007 114 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer