Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/23472
Type: Artigo de periódico
Title: Hidrogenofosfato de titânio lamelar: síntese, troca iônica e intercalação
Title Alternative: Lamellar titanium hydrogenphosphate: synthesys, ion-exchange and intercalation
Author: Nunes, Liliane M.
Airoldi, Claudio
Abstract: The development associated with the research field involving crystalline inorganic lamellar titanium hydrogenphosphate, Ti(HPO4).H2O, synthesized as alpha or gamma forms, is directly linked to the huge number of reactions, that occur inside the free interlamellar space. Two distinguishable well-characterized features such as ion-exchange and intercalation reactions are explored here. From the interactive point of view, the acidic OH centres distributed on the lamella can interact with cations or with basic polar molecules to exchange or to intercalate them. These chemical reactions are normally followed by an expansion of the interlamellar space, proportional to the amount intercalated, reflecting in ion radii or organic molecule size lengths used in ion-exchange or insertion processes, respectively. The effectiveness of the exchange increased when the original matrix has the proton of OH group previously ion-exchanged by an alkaline or an alkylammonium cations. Monoalkyl-, dialkyl- and heterocyclic amines are focused in this revision as clear and elucidative examples of acid-base interactive processes, that come out inside of the well-formed infinite sequence of inorganic lamellar structure.
Subject: titanium hydrogenphosphate
lamellar
intercalation
ion-exchange
amine
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0100-40422001000600018
Address: http://dx.doi.org/10.1590/S0100-40422001000600018
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422001000600018
Date Issue: 1-Dec-2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
S0100-40422001000600018.pdf218.54 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.