Sr1−xBaxSnO3 system applied in the photocatalytic discoloration of an azo-dye

Abstract

Semiconductor materials have received substantial attention as photocatalysts for controlling water pollution. Among these materials, perovskite-structured SrSnO 3 is a promising candidate for this application, whereas BaSnO 3 exhibits very low activity. In the present work, Sr 1-x Ba x SnO 3 (x = 0, 0.25, 0.50, 0.75 and 1) was synthesized by solid-state reaction and was applied in the photocatalytic discoloration of the organic dye Remazol Golden Yellow. The perovskite structure was obtained for all compositions of the solid solutions with both Sr The two materials appear to feature different mechanisms of photodegradation: the direct mechanism prevails in the case of BaSnO 3 , whereas the indirect mechanism appears to play a key role in the case of SrSnO 3 .

CaSnO 3 obtained by modified Pechini method applied in the photocatalytic degradation of an azo dye

“…Some of these works reported the use of alkaline earth stannates in water splitting [5,13,14], whereas others applied these materials for dye photodegradation, [9,12]. For instance, Sales et al [15] synthesized Sr 1-x Ba x SnO 3 powders and observed that the photodegradation of remazol golden yellow is strongly influenced by the composition of the photocatalyst. In a recent study, Moshtaghi et al [16] investigated the photodegradation of acid blue 92 and acid black 1 using SrSnO 3 as the photocatalyst and obtained discoloration percentages larger than 93%.…”

Partition study of textile dye Remazol Yellow Gold RNL in aqueous two-phase systems

“…This dye is commonly used in the textile industry for dyeing cellulose fibers. The removal of Remazol Yellow Gold RNL from aqueous solutions has been accomplished by adsorption [17], anaerobic degradation [18] and photocatalytic approaches [19].…”

One-pot synthesis of Ag-modified LaMnO3–graphene hybrid photocatalysts and application in the photocatalytic discoloration of an azo-dye

“…9 To maximize the use of sunlight, photocatalysts with the perovskite (ABO 3 ) structure have been recently exploited as highly effective photocatalysts. Several researchers have employed different strategies to solve this problem, such as the partial substitution 11 and nitrogen doping of A or B ions, 12 coupling with semiconductors, 13 or modication with noble metals. Several researchers have employed different strategies to solve this problem, such as the partial substitution 11 and nitrogen doping of A or B ions, 12 coupling with semiconductors, 13 or modication with noble metals.…”