Macroporous Glass Monoliths Prepared From Powdered Niobium Phosphate Glass By Fast Sintering

Macroporous monoliths were prepared by very fast sintering (between 3 and 15 min) of niobophosphate glass powders at low temperature (1018 K) using cellulose as a foaming agent. The porous materials were analyzed by thermal analysis, Raman spectroscopy, scanning electron microscopy and powder X-ray diffraction, and further investigated using X-ray microtomography, a non-destructive technique capable of reconstructing three-dimensional models of samples and providing structural measurements. The progression of the porosity of the monoliths depends on the sintering time (3 to 15 min) and the amount (up to 50% in mass) of cellulose used. The macroporous glass monoliths may find application in integrated chemical systems and in filtering processes. © 2011 Elsevier Inc. All rights reserved.623263267Innocentini, M.D.M., Antunes, W.L., Baumgartner, J.B., Seville, J.P.K., Coury, J.R., Permeability of ceramic membranes to gas flow (1999) Mater Sci Forum, 299-300, pp. 19-28Palmeri, J., Blanc, P., Larbot, A., David, P., Theory of pressure-driven transport of neutral solutes and ions in porous ceramic nanofiltration membranes (1999) Journal of Membrane Science, 160 (2), pp. 141-170. , DOI 10.1016/S0376-7388(99)00081-2, PII S0376738899000812Sondhi, R., Bhave, R., Role of backpulsing in fouling minimization in crossflow filtration with ceramic membranes (2001) Journal of Membrane Science, 186 (1), pp. 41-52. , DOI 10.1016/S0376-7388(00)00663-3, PII S0376738800006633Anpo, M., Wada, T., Kubokawa, Y., Photochemistry in the adsorbed layer. V. Effects of surface pretreatments upon the photolysis of adsorbed 2-pentanone (1975) Bull Chem Soc Jpn, 48, pp. 2663-2666Anpo, M., Aikawa, N., Kubokawa, Y., Che, M., Louis, C., Giamello, E., Photoluminescence and photocatalytic activity of highly dispersed titanium oxide anchored onto porous Vycor glass (1985) J Phys Chem, 89, pp. 5017-5021Yamashita, H., Ichihashi, Y., Harada, M., Stewart, G., Fox, M.A., Anpo, M., Photocatalytic degradation of 1-octanol on anchored titanium oxide and on TiO2 powder catalysts (1996) Journal of Catalysis, 158 (1), pp. 97-101. , DOI 10.1006/jcat.1996.0010Nakagaki, S., Ramos, A.R., Benedito, F.L., Peralta-Zamora, P.G., Zarbin, A.J.G., Immobilization of iron porphyrins into porous vycor glass: Characterization and study of catalytic activity (2002) Journal of Molecular Catalysis A: Chemical, 185 (1-2), pp. 203-210. , DOI 10.1016/S1381-1169(02)00025-0, PII S1381116902000250Hultman, H.M., Lang, M., Arends, I.W.C.E., Hanefeld, U., Sheldon, R.A., Maschmeyer, T., Chiral catalysts confined in porous hosts: 2. Catalysis (2003) J Catal, 217, pp. 275-283Kawachi, E.Y., Bertran, C.A., Reis, R.R., Alves, O.L., Bioceramics: Tendencies and perspectives of an interdisciplinary area (2000) Quim Nova, 23, pp. 518-522Melde, B.J., Stein, A., Periodic macroporous hydroxyapatite-containing calcium phosphates (2002) Chem Mater, 14, pp. 3326-3331Bard, A.J., (1994) Integrated Chemical Systems - A Chemical Approach to Nanotechnology, , Wiley New YorkSotomayor, P.T., Raimundo Jr., I.M., Zarbin, A.J.G., Rohwedder, J.J.R., Neto, G.O., Alves, O.L., Construction and evaluation of an optical pH sensor based on polyaniline-porous Vycor glass nanocomposite (2001) Sensors and Actuators, B: Chemical, 74 (1-3), pp. 157-162. , DOI 10.1016/S0925-4005(00)00726-7, PII S0925400500007267Hosono, H., Abe, Y., Porous glass-ceramics with skeleton of two-dimensional layered crystal Ti(HPO4)2.2H2O (1992) J NonCryst Solids, 139, pp. 86-89Ducheyne, P., El-Ghannam, A., Shapiro, I., (1997), US5676720-AFuruta, S., Nakao, H., Katsuki, H., Preparation of porous ceramics from industrial waste silica mineral (1993) J Mater Sci Lett, 12, pp. 286-287Wang, C., Kasuga, T., Nogami, M., Macroporous calcium phosphate glass-ceramic prepared by two-step pressing technique and using sucrose as a pore former (2005) Journal of Materials Science: Materials in Medicine, 16 (8), pp. 739-744. , DOI 10.1007/s10856-005-2611-8Rambo, C.R., Ghussn, L., Sene, F.F., Martinelli, J.R., Manufacturing of porous niobium phosphate glasses (2006) Journal of Non-Crystalline Solids, 352 (32-35), pp. 3739-3743. , DOI 10.1016/j.jnoncrysol.2006.03.104, PII S0022309306007563, Glasses and Related Materials 7 Proceedings of the 7th Brazilain Symposium on Glasses and Related Materials and 3rd International Symposium on Non-Crystalline Solids in BrazilMazali, I.O., Barbosa, L.C., Alves, O.L., Preparation and characterization of new niobophosphate glasses in the Li2O-Nb2O5-CaO-P2O5 system (2004) J Mater Sci, 39, pp. 1987-1995Maire, E., Buffière, Y.J., Salvo, L., Blandin, J.J., Ludwig, W., Létang, J.M., On the application of X-ray microtomography in the field of materials science (2001) Adv Eng Mater, 3, pp. 539-546Luyten, J., Mullens, S., Cooymans, J., De Wilde, A.M., Thijs, I., Kemps, R., Different methods to synthesize ceramic foams (2009) J Eur Ceram Soc, 29, pp. 829-832Kerckhofs, G., Schrooten, J., Van Cleynenbreugel, T., Lomov, V., Wevers, M., Validation of X-ray microfocus computed tomography as an imaging tool for porous structures (2008) Rev Sci Instrum, 79, pp. 013711-013719Feldkamp, L.A., Davis, L.C., Kress, J.W., Practical cone-beam algorithm (1984) J Opt Soc Am, 1, pp. 612-619Mazali, I.O., Alves, O.L., Porous glass-ceramic with skeleton of α-NbPO5 with three-dimensional network structure (2001) Journal of Materials Science Letters, 20 (23), pp. 2113-2117. , DOI 10.1023/A:101371611268