2009•Hebei Chemical Engineering and IndustryRequires access
Study on Photocatalytic Activity of the Perovskite Type Ca_xSr_(1-x)FeO_3
Zhibin Wang
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Abstract
SrFeO3 perovskite complex oxides nano-crystal together with a series of another multi-component perovskites by partial substitution of cations in position A with Ca were prepared first from the Sol-Gel method using the critic acid.The temperature of firing bulk-gel was determined by TGA.The XRD method was used to carried out the characterization of powders and determine the grain size.The result showed that the prepared catalysts were perovskite structure and the result of TEM showed that the grain sizes of the powders were between 50～70 nm.During the study of the UV-VIS spectrums,we found Sr1-xCaxFeO3 particles had a better photo-catalytic activity than the pure SrFeO3 particles in the solution of methylene blue.At last we obtained Sro.95Ca0.5FeO3 that is the best composition of the semiconductor catalyst.