caa a22 4500 463189892 CHVBK 20180406164905.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10973-007-8515-8 doi (NATIONALLICENCE)springer-10.1007/s10973-007-8515-8 The low temperature synthesis of metal oxides by novel hydrazine method [Elektronische Daten] [K. Rane, H. Uskaikar, R. Pednekar, R. Mhalsikar] The hydroxide, oxalate and citrate precursors of the metal oxides such as γ-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→N2+2H2O; ΔH=−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 γ-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. Springer Science+Business Media, LLC., 2007 hydrazinate precursors nationallicence hydrazine nationallicence N-doped oxide nationallicence thermal decomposition nationallicence Rane K. Department of Chemistry, Goa University, 403206, Goa, India aut Uskaikar H. Department of Chemistry, Goa University, 403206, Goa, India aut Pednekar R. Department of Chemistry, Goa University, 403206, Goa, India aut Mhalsikar R. Department of Chemistry, Goa University, 403206, Goa, India aut Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/3(2007-12-01), 627-638 1388-6150 90:3<627 2007 90 10973 https://doi.org/10.1007/s10973-007-8515-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-007-8515-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rane K. Department of Chemistry, Goa University, 403206, Goa, India aut NATIONALLICENCE 700 1- Uskaikar H. Department of Chemistry, Goa University, 403206, Goa, India aut NATIONALLICENCE 700 1- Pednekar R. Department of Chemistry, Goa University, 403206, Goa, India aut NATIONALLICENCE 700 1- Mhalsikar R. Department of Chemistry, Goa University, 403206, Goa, India aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/3(2007-12-01), 627-638 1388-6150 90:3<627 2007 90 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer