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• W2116721044 abstract "Perovskite-type LaCoO3−x(x=0∼0.075) porous powder was synthesized via citrate sol-gel method. With calcination temperature increasing, its crystal structure changed from LaCoO3 to LaCoO2.925 with the increase in oxygen vacancy. The synthesized LaCoO3−x contains a large amount of adsorbed oxygen on its surface due to the existence of oxygen vacancy to some extent. Dye degradation activity of LaCoO3−x in methyl orange solution was investigated both under the visible light irradiation (>400 nm) and in the dark. LaCoO3−x exhibited dye degradation activity in the dark when being preserved in methyl orange solution for a long time caused by the reducibility of Co3+ in LaCoO3−x, and then dye molecule was oxidized gradually and slowly. The degradation rate was improved under the visible light due to the optical property of LaCoO3−x in visible light region. After degradation, methyl orange molecule may be decomposed to acetate group in a small amount. After use for a long time, some Co3+ was reduced to Co2+ accompanied by the formation of oxygen vacancy, and then LaCoO3 transformed to LaCoO2.925 gradually. For LaCoO3−x calcined at 800°C, LaCoO3−x perovskite skeleton structure was stable, and can be reused in recycle dye degradation." @default.
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• W2116721044 date "2010-01-01" @default.
• W2116721044 modified "2023-10-16" @default.
• W2116721044 title "Dye Degradation Activity and Stability of Perovskite-Type LaCoO<SUB>3&minus;<I>x</I></SUB> (<I>x</I>=0&sim;0.075)" @default.
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• W2116721044 doi "https://doi.org/10.2320/matertrans.m2010200" @default.
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