Part of #Synthesis of nanoperovskite type oxides using sol–gel method and its application on removal of azo dye from aqueous solution# :
Publishing year : 2013
Conference : Third National Symposium on Chemistry Applications in New Technologies
Number of pages : 7
Abstract: A1-xAxBO3 belongs to perovskite oxides of the ABO3 structure . In this study, nanoparticles of La1-xCaxCrO3 (x = 0 to 0.5) were fabricated by sol-gel citrate technique. A series of common analytical techniques were used to characterize the crystallinity, morphology, specific surface area, and grain size of the nanopowders. These properties were characterized by means of XRD, DTA / TGA, SEM, and FTIR. The calculated particles size using the Scherrer formula was about 22 nm. Moreover, the family of perovskite-type oxides could be considered as an adsorbent / catalyst material for the theremoval of dyes [2,3]. This study also investigated the efficiency of La0.9Ca0.1CrO3, as an adsorbent forremoval of azo dye (Eriochrome black T), from an aqueous solution. The effect of different variables on the permeation of dye on perovskite nanopowders has been evaluated. Adsorption studies were carried out at different pH values, dye The dye removal efficiency was found to be reduced by increasing the initial pH of the dye solution, and this nanoadsorbent exhibited a good color fast removal effect at acidic pH, especially pH 2.