Santos, LRBBelin, S.Briois, VSantilli, Celso Valentim [UNESP]Pulcinelli, Sandra Helena [UNESP]Larbot, A.2014-05-202014-05-202003-01-01Journal of Sol-gel Science and Technology. Dordrecht: Kluwer Academic Publ, v. 26, n. 1-3, p. 171-175, 2003.0928-0707http://hdl.handle.net/11449/33618This work describes the chemical modification by Tiron(R) molecules of the surface of SnO2 nanoparticles used to prepare nanoporous membranes. Samples prepared with Tiron(R) content between 1 and 20 wt% and fired at 400 C were characterised by X-Ray Powder Diffraction (XRPD), Extended X-ray Absorption Fine Structure (EXAFS), N-2 adsorption isotherms analysis and permeation experiments. XRPD and EXAFS results show a continuous reduction of crystallite size by increasing the Tiron(R) contents until 7.5 wt%. The control exercised by Tiron(R) modifying agent in crystallite growth allows the fine tuning of the average pore size that can be screened from 0.4 to 4 nm as the amount of grafted molecules decreases from 10 to 0 wt%. In consequence, the membrane cut-off can be screened from 1500 to 3500 g.mol(-1).171-175engceramic membranessurface modificationultrafiltrationporosityArtigo10.1023/A:1020778411051WOS:000178789100029Acesso restrito558429868187086599712025852869670000-0002-8356-8093