Trivalent iron incorporated mesoporous aluminophosphate was synthesized under hydrothermal conditions. The synthesized mesoporous Fe-AlPO was characterized by using various physico-chemical techniques, which confirm the formation of mesophase as well as the presence of trivalent iron in the framework. Catalytic activity of mesoporous Fe-AlPO was tested for the oxidation of cyclohexane. Trivalent iron incorporated mesoporous aluminophosphate was synthesized and characterized. Activity of Fe-AlPO was tested for aerial oxidation of cyclohexane under autoclave conditions. The results indicated that Fe-AlPO is an active catalyst for oxidation of cyclohexane and the reaction is probably taking place through radical initiated mechanism. © 2004 Elsevier B.V. All rights reserved.

Balasubramanian Viswanathan

Thirukkallam Kanthadai Varadarajan

PHYSICO-CHEMICAL TECHNIQUES

TRIVALENT IRON

Catalyst activity

Mesoporous Materials

oxidation

Synthesis (chemical)

Iron

aluminum derivative

Cyclohexane

phosphate

catalysis

conference paper

Heat treatment

oxidation kinetics

physical chemistry

Porosity

surface property

synthesis

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Journal of Molecular Catalysis A: Chemical

Thermally stable trivalent iron-substituted hexagonal mesoporous aluminophosphate (FeHMA) molecular sieves were synthesized and systematically characterized using analytical and spectroscopic techniques, including XRD, TEM, ICP-AES, TGA-DTA, N2 sorption, DRUV-vis, EPR, and Mössbauer spectroscopy. The characterization studies showed that framework substitution of trivalent iron in tetrahedral framework position of the mesoporous aluminophosphate has taken place. Mössbauer revealed the presence of a small amount of divalent iron. This material has high thermal stability with regard to the dislodgement of trivalent iron from the framework structure on calcination and showed excellent activity in the liquid-phase oxidation of cycloalkanes such as cyclohexane, cyclooctane, and cyclododecane in presence of molecular oxygen or air under mild reaction conditions. FeHMA behave as a heterogeneous catalyst; the catalytic activity was practically unaffected by recycling experiments. Furthermore, the oxidation was successful for the bulkier cycloalkane molecules. A comparative study with selected iron-containing molecular sieve-based catalysts indicated that FeHMA is a promising heterogeneous catalyst with respect to its microporous analogue (FeAPO-5) as well as the silicate analogues, microporous FeS-1 and mesoporous FeMCM-41. © 2005 Elsevier Inc. All rights reserved.

Journal of Catalysis

Thermally stable trivalent iron-substituted hexagonal mesoporous aluminophosphate (FeHMA) molecular sieves: Synthesis, characterization, and catalytic properties

The synthesis of mesoporous Cr-AlPO was carried out under hydrothermal conditions. Characterisation of the catalyst was done with low angle XRD, N 2 adsorption, UV-VISDRS, ESR and thermal analysis. The catalytic activity was tested for partial oxidation of toluene with molecular oxygen in vapour phase. It was observed that Cr-AlPO functions both as acid and redox catalyst. © 2002 Elsevier Science B.V. All rights reserved.

Fulltext

Catalysis Communications

Partial oxidation of toluene by O2 over mesoporous Cr-AlPO

Self-assembled ordered cetyltrimethylammonium bromide (CTAB) is used as a template for the synthesis of mesoporous silicoaluminophosphates with varying Si/Al ratio.

Chemical Communications

Synthesis and characterization of mesoporous SAPO

Trivalent iron substituted hexagonal mesoporous aluminophosphate molecular sieve has been synthesized and characterized for the first time, which showed excellent catalytic activity and reusability for the cyclohexane oxidation reaction under mild conditions. © 2002 The Royal Society of Chemistry.

Synthesis, characterization and catalytic properties of trivalent iron substituted hexagonal mesoporous aluminophosphates

Catalytically active centres in porous oxides: design and performance of highly selective new catalysts

Applied Catalysis A: General

Synthesis of mesoporous hexagonal titanium aluminophosphate molecular sieves and their catalytic applications

Synthesis, characterization and catalytic activity of mesoporous trivalent iron substituted aluminophosphates

Journal	Journal of Molecular Catalysis A: Chemical
ISSN	13811169
Open Access	No