Influence of the synthesis conditions on the incorporation of B and the acidity in B-MCM-41 materials
作者： Eliana G. Vaschetto , Gina A. Pecchi , Sandra G. Casuscelli , Griselda A. Eimer
DOI: 10.1016/J.MICROMESO.2016.06.039
关键词: Adsorption 、 Boron 、 Hydrothermal synthesis 、 Silanol 、 Mesoporous material 、 Hydroxide 、 Inorganic chemistry 、 MCM-41 、 Chemistry 、 Catalysis
摘要: Abstract B-MCM-41 type nano-structured materials were prepared by direct hydrothermal synthesis. The time of treatment, the Si/B initial molar ratio and nature hydroxide source in synthesis process analyzed. All characterized XRD, N2 adsorption, TEM, SEM, ICP-OES, FT-IR adsorption pyridine coupled to spectroscopy. role is essential achieve incorporation boron mesoporous structure. relationship between Boron content gel, degree introduction tetra-coordinated B into framework, formation nest silanols relative density acidic sites have been discussed. We could corroborate that hydroxyl groups present silanol nests are responsible moderate Bronsted acidity our materials. enhancement was reached increasing Finally, use NH4OH, as source, 10 20 a treatment 6 days resulted optimum conditions obtain highest framework more abundant (silanol nests), thus improving potential catalytic properties these
sci-hub.se 参考文章(45)
Griselda A. Eimer, Liliana B. Pierella, Gustavo A. Monti, Oscar A. Anunziata, Synthesis and Characterization of Al-MCM-41 and Al-MCM-48 Mesoporous Materials Catalysis Letters. ,vol. 78, pp. 65- 75 ,(2002) , 10.1023/A:1014924332500
T. Yashima, K. Miura, T. Komatsu, Beckmann rearrangement of cyclohexanone oxime on the external surface of zeolite crystals Studies in Surface Science and Catalysis. ,vol. 84, pp. 1897- 1904 ,(1994) , 10.1016/S0167-2991(08)63747-7
Zelimir Gabelica, Jean-Marc Clacens, Roger Sobry, Guy Van den Bossche, Characterization of hexagonal and lamellar mesoporous silicas, alumino- and gallosilicates by small-angle x-ray scattering (SAXS) and multinuclear solid state NMR Studies in Surface Science and Catalysis. ,vol. 97, pp. 143- 147 ,(1995) , 10.1016/S0167-2991(06)81883-5
U. Oberhagemann, I. Topalovic, B. Marler, H. Gies, Synthesis and characterization of boron containing MCM-41 Studies in Surface Science and Catalysis. ,vol. 98, pp. 17- 18 ,(1995) , 10.1016/S0167-2991(06)81065-7
C Otero Areán, M Rodrıguez Delgado, V Montouillout, JC Lavalley, C Fernandez, JJ Cuart Pascual, JB Parra, NMR and FTIR spectroscopic studies on the acidity of gallia–silica prepared by a sol–gel route Microporous and Mesoporous Materials. ,vol. 67, pp. 259- 264 ,(2004) , 10.1016/J.MICROMESO.2003.11.009
D. Trong On, P.N. Joshi, G. Lemay, S. Kaliaguine, Acidity and structural state of boron in mesoporous boron silicate MCM-41 Studies in Surface Science and Catalysis. ,vol. 97, pp. 543- 549 ,(1995) , 10.1016/S0167-2991(06)81937-3
A. Chenite, Y. Le Page, A. Sayari, Direct TEM Imaging of Tubules in Calcined MCM-41 Type Mesoporous Materials Chemistry of Materials. ,vol. 7, pp. 1015- 1019 ,(1995) , 10.1021/CM00053A031
Verónica Elías, Ema Sabre, Karim Sapag, Sandra Casuscelli, Griselda Eimer, Influence of the Cr loading in Cr/MCM-41 and TiO2/Cr/MCM-41 molecular sieves for the photodegradation of Acid Orange 7 Applied Catalysis A-general. ,vol. 413, pp. 280- 291 ,(2012) , 10.1016/J.APCATA.2011.11.019
E. Escalona Platero, M. Peñarroya Mentruit, C. Otero Areán, A. Zecchina, FTIR Studies on the Acidity of Sulfated Zirconia Prepared by Thermolysis of Zirconium Sulfate Journal of Catalysis. ,vol. 162, pp. 268- 276 ,(1996) , 10.1006/JCAT.1996.0284
M Selvaraj, A Pandurangan, K.S Seshadri, P.K Sinha, K.B Lal, Synthesis, characterization and catalytic application of MCM-41 mesoporous molecular sieves containing Zn and Al Applied Catalysis A-general. ,vol. 242, pp. 347- 364 ,(2003) , 10.1016/S0926-860X(02)00527-6