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H+/Na+ ion equilibria of ZSM-5 with respect to surface composition

Title data

Dubbe, Andreas ; Moos, Ralf:
H+/Na+ ion equilibria of ZSM-5 with respect to surface composition.
2007
Event: 19. Deutsche Zeolith-Tagung , 07.-09.03.2007 , Leipzig, Deutschland.
(Conference item: Conference , Other Presentation type)

Project information

Project title:
Project's official titleProject's id
No informationMO 1060/4-2

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

The zeolite ZSM-5 (MFI) is used as solid-state ion conducting material for electrochemical applications including gas sensors. Zeolites with defined ion composition in the micropores are commonly prepared by ion exchange in aqueous solutions. However, for properties such as electrode kinetics and grain boundary conductivity, the composition at the surfaces of the single zeolite crystals is of crucial importance and should be controlled. In order to achieve this, we have to study the ion exchange equilibria of the surface sites. Aim of the present study is to gain information about the ion equilibria of the surface sites by pH measurements of Na-ZSM-5 suspensions in dependence of Na+ and H3O+ addition in aqueous solutions. The ionic equilibria of both surface and volume sites are modelled under consideration of concentration dependent ion activities, which are well known for aqueous HCl-NaCl solutions. The results allow us to determine preparation conditions for zeolites with controlled surface ion compositions.

Further data

Item Type: Conference item (Other)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Faculties
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 09 Jun 2015 07:41
Last Modified: 06 Apr 2016 08:16
URI: https://eref.uni-bayreuth.de/id/eprint/14853