Abstract
Nd1−xSrxMnO3 nanocomposites perovskites were synthesized using sol gel method at different Sr content x = 0.3, 0.5, 0.7, and 0.9. The photocatalytic performance of the Nd1−xSrxMnO3 nanocomposites for photodegradation of Acridine orange dye (AO) was evaluated over visible light illumination. The single phase of orthorhombic pbnm was formed for x = 0.3 and 0.5; however monoclinic and orthorhombic were observed at x = 0.7 and 0.9. The Energy gap of the Nd1−xSrxMnO3 nanocomposites were estimated for all concentrations to be in the range of 3 ± 0.05 eV. The photocatalytic efficiency of Nd0.3Sr0.7MnO3 nanocomposite was 95% of the initial AO dye concentration within 3 h illumination time. The linear increase of the photodegradation rate was found in our samples as a result of the increase of Sr contents from 0.3 to 0.7wt %. Interestingly, the Nd0.3Sr0.7MnO3 content has the highest degradation rate of AO which is two times faster than undoped NdMnO3. This superior behavior in photocatalytic activity of Nd0.3Sr0.7MnO3 nanocomposite emerges from large surface area, structural anisotropy, and small particle size. These findings shows convincingly that the Nd1−xSrxMnO3 photocatalysts possess great promise for visible light driven photodegradation of AO dye.
Highlights
Www.nature.com/scientificreports correlated with their rich crystal structures[38,39,40,41,42]
In the photodegradation of Acridine orange dye (AO) reaction, AO was conducted as a probe pollutant to evaluate the photocatalytic performance of NdMnO3, Nd0.7Sr0.3MnO3, Nd0.5Sr0.5MnO3, Nd0.3Sr0.7MnO3 and Nd0.1Sr0.9MnO3 perovskites nanocomposites. 100 ml of AO dye [0.03 mM] and 0.5 gL−1 photocatalyst were mixed in photoreactor with magnetic stirring
There was insignificant decrease in AO dye concentration was observed in the dark without a light source and by illumination in the absence of Sr doped NdMnO3 photocatalyst, It is clearly seen that 95% of the initial AO dye concentration was degraded after 3 h illumination time (Fig. 8)
Summary
This superior behavior in photocatalytic activity of Nd0.3Sr0.7MnO3 nanocomposite emerges from large surface area, structural anisotropy, and small particle size These findings shows convincingly that the Nd1−xSrxMnO3 photocatalysts possess great promise for visible light driven photodegradation of AO dye. A lot of research work has been devoted to study photocatalysis performance of perovskite-like materials such as tantalate[26,27,28,29], titanate[30,31,32,33], ferrite[15,16,17], vanadium and niobium[34,35,36,37], and manganites[11,12,13] These materials have displayed visible light photocatalytic activity because they have exclusive electronic properties, which. Where Co and Ct are the initial AO dye concentrations before illumination, and the AO dye concentration at interval illumination time, respectively
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