IR @ Goa University

The low temperature synthesis of metal oxides by novel hydrazine method

Show simple item record Rane, K.S. Uskaikar, H. Pednekar, R. Mhalsikar, R.G. 2015-06-03T09:34:35Z 2015-06-03T09:34:35Z 2007
dc.identifier.citation Journal of Thermal Analysis and Calorimetry. 90(3); 2007; 627-638. en_US
dc.description.abstract The hydroxide, oxalate and citrate precursors of the metal oxides such as gamma-Fe2O3, (MnZn)Fe2O4, Cu(K)Fe2O4, BaTiO3, La(Sr)MnO3, La(Sr)AlO3, La/Gd(Ca/Ba/Sr)CoO3, and anatase TiO2 on modifications with the hydrazine decompose at low temperatures give single phase oxides of superior properties, while the complexes without such modification require higher temperatures for achieving the phases. The hydrazine released at lower temperatures reacts with the oxygen in the atmosphere, N2H4+O2 to N2+2H(2)O; Delta H=-625 kJ mol(-1), and liberates enormous energy that is sufficient for the oxidative decomposition of the complexes now devoid of hydrazine. Such extra energy is not available in the case of the precursors without such modifications. The reaction products of hydrazine oxidation provide desired partial pressure of moisture needed for the stabilization of gamma-Fe2O3. Also, the nitrogen that is formed in the reaction of hydrazine with oxygen gets trapped in the lattice of TiO2 giving yellow color nitrogen doped TiO2-xNx photocatalyst. Thus, hydrazine method of preparation has many advantages in the preparation of metal oxides of superior properties. en_US
dc.publisher Springer Verlag (Germany); Akademiai Kiado en_US
dc.subject Chemistry en_US
dc.title The low temperature synthesis of metal oxides by novel hydrazine method en_US
dc.type Journal article en_US
dc.identifier.impf y

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search IR

Advanced Search


My Account