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Synthesis of mixed galloaluminophosphate oxynitrides: the influence of nitridation on the "AlGaPON" acido-basic properties

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Delsarte, Stéphanie [UCL] Peltier, V Laurent, Y. Grange, Paul [UCL]

In this paper, we present the study of the synthesis parameters and characterisation of the acido-basic properties of mixed galloaluminophosphate oxynitrides, the " AlGaPON ". They were obtained by temperature programmed activation under ammonia flow of amorphous reactive phosphate precursors. Substitution of oxygen by nitrogen modifies the surface acido-basic properties of the " AlGaPON " and allows their use as basic catalysts in the Knoevenagel-type condensation. We present a systematic study of the link between the nitridation time, the bulk nitrogen content and the acido-basic properties of the " AlGaPON " evaluated by ammonia chemisorption and by IR spectroscopy of the pyridine adsorption on the " AlGaPON " surface.

Document type Communication à un colloque (Conference Paper) – Présentation orale avec comité de sélection
Publication date 1998
Language Anglais
Conference "7th International Symposium on Scientific Bases for the Preparation of Heterogeneous Catalysts", LOUVAIN LA NEUVE(Belgium) (Sep 01-04, 1998)
Journal information "Studies in Surface Science and Catalysis" - Vol. 118, p. 869-878 (1998)
Peer reviewed yes
issn 0167-2991
Publisher Elsevier Science Publ B V (Amsterdam)
Affiliation UCL - AGRO/CABI - Département de chimie appliquée et des bio-industries
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Bibliographic reference Delsarte, Stéphanie ; Peltier, V ; Laurent, Y. ; Grange, Paul. Synthesis of mixed galloaluminophosphate oxynitrides: the influence of nitridation on the "AlGaPON" acido-basic properties.7th International Symposium on Scientific Bases for the Preparation of Heterogeneous Catalysts (LOUVAIN LA NEUVE(Belgium), Sep 01-04, 1998). In: Studies in Surface Science and Catalysis, Vol. 118, p. 869-878 (1998)
Permanent URL http://hdl.handle.net/2078.1/62420