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Porous Silicon Nitride Materials as Basic Catalysts
Author(s) -
Hullmann D.,
Wendt G.,
Ziegenbalg G.
Publication year - 2001
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/1521-4125(200102)24:2<147::aid-ceat147>3.0.co;2-c
Subject(s) - catalysis , silicon nitride , silicon oxide , materials science , knoevenagel condensation , benzaldehyde , nitride , amorphous solid , chemical engineering , silicon , inorganic chemistry , nanotechnology , chemistry , organic chemistry , metallurgy , layer (electronics) , engineering
Investigations were conducted to test the use of amorphous silicon nitride as a basic catalyst. Silicon nitride powders characterized by a high specific surface area were prepared by gas‐phase ammonolysis of tetrachlorosilane. The Knoevenagel condensation of benzaldehyde and malonitrile served as a test reaction to characterize the catalytic properties of the materials. It was found that favorable synthesis conditions result in powders showing a stronger catalytic activity than high surface magnesium oxide. However, a disadvantage is the sensitivity of the amorphous silicon nitride against water.