Gosavi, Priti V. and Biniwale , Rajesh B. (2010) Pure phase LaFeO3 perovskite with improved surface area synthesized using different routes and its characterization. Material Chemistry and Physics, 119 (1-2). pp. 324-329. ISSN 0254-0584

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Abstract

Three different wet chemistry routes, namely co-precipitation, combustion and sol–gel methods were used to synthesize LaFeO3 perovskite with improved surface area. The synthesized perovskite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectrometer (EDS), Brunauer–Emmett–Teller (BET) nitrogen adsorption, ultraviolet diffused reflectance spectroscopy (UVDRS) and Fourier transform infrared (FTIR) spectroscopy techniques. Improved surface area was observed for all three methods as compared to the previously reported values. The perovskite synthesized using sol–gel method yields comparatively pure, crystalline phase of LaFeO3 and relatively higher surface area of 16.5 m2 g−1 and porosity. The material synthesized using co-precipitation method yielded other phases in addition to the targeted phase. The morphology of perovskite synthesized using co-precipitation method was uniform agglomerates. Combustion method yields flakes type morphology and that of sol–gel method was open pore type morphology. The selection of method for perovskite synthesis largely depends on the targeted application and the desired properties of perovskites. The results reported in this study are useful for establishing a simple scalable method for preparation of high surface area LaFeO3 as compared to solid-oxide method. Further, the typical heating cycle followed for calcinations resulted in relatively high surface area in the case of all three methods.

Item Type:	Article
Uncontrolled Keywords:	Oxides;Chemical Synthesis;Powder Diffraction
Subjects:	Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajesh Biniwale
Date Deposited:	31 Oct 2014 05:37
Last Modified:	31 Oct 2014 05:37
URI:	http://neeri.csircentral.net/id/eprint/536

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