Influence of the modifier on the short and long range disorder of stannate perovskites

Alves, Mary Cristina Ferreira; Souza, Soraia Carvalho de; Lima, Hebert H. S.; Nascimento, Marcelo; Silva, Márcia R. S.; Espinosa, J. W. M.; Lima, Severino Jackson Guedes de; Longo, Elson; Pizani, P. S.; Soledade, L. E. B.; Souza, A. G.; Santos, I. M. G.

doi:10.1016/j.jallcom.2008.09.034

Cited by 40 publications

(15 citation statements)

References 16 publications

(29 reference statements)

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“…According to the ICDD 76-0606, the peak at 27º indicated the presence of CaCO 3 as a secondary phase. The presence of CaCO 3 in CaSnO 3 and Ca 1-x Sr x SnO 3 samples was also confirmed in [26,27]. Fig.…”

Section: Characterization Of the Materialssupporting

confidence: 54%

“…The bands located at 870, 1051, and 1454 cm -1 were assigned to carbonate vibrations [31], and the band at 1643 cm -1 was associated with water angular deformation. The vibrations assigned to stannates (SnO 3 2-) generally produce highintensity bands in the infrared region at 300-400 cm -1 and 600-700 cm -1 with a band broadening typical of orthorhombic perovskite structures [27,32]. The mid-IR spectrum of CaSnO 3 showed a band at 641 cm -1 assigned to the stretching mode of Sn-O [33,34].…”

Section: Characterization Of the Materialsmentioning

confidence: 99%

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

et al. 2017

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Pure forms of alkaline-earth stannates with perovskite structure (ASnO 3 , A= Ca ) have been used as photocatalysts. In this work, CaSnO 3 perovskite sample was synthesized by a modified Pechini method at 800 ºC and characterized by X-ray diffraction (XRD), UV-visible spectroscopy, infrared spectroscopy and Raman spectroscopy. The photocatalytic degradation of remazol golden yellow (RNL) dye under UV radiation was evaluated. The XRD pattern showed that the synthesis method favored the orthorhombic CaSnO 3 crystallization. According to the Raman spectrum, a material with high short-range order was obtained despite of the relatively low synthesis temperature, compared to the solid-state reaction one. The highest photocatalytic activity was attained at pH 3, which presented 51% discoloration and improved activity of 35% compared to discoloration solely due to adsorption (absence of radiation). The point of zero charge (PZC) and the photocatalytic results indicated that a direct mechanism prevailed at pH 3, whereas an indirect mechanism prevailed at pH 6.

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Section: Characterization Of the Materialssupporting

confidence: 54%

Section: Characterization Of the Materialsmentioning

confidence: 99%

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

et al. 2017

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“…In case of the SSSrSnO 3 powder, the Raman spectrum is in agreement with Zhang's previously reported result [11] in terms of the active modes of SrSnO 3 located at 119, 150, 168, 220, 257, 305, 403, 511, 596, 713 and 890 cm À1 . On the other hand, the Raman spectrum of SrSnO 3 nanoparticles is very different from that of SS-SrSnO 3 and bears more resemblance to Alves's result [20,21] where bands appear at 93, 108, 119, 152, 186, 227, 250, 261, 406, 577, 703 and 986 cm À1 . This difference has relevance to the incorporation of carbonate anions into the SrSnO 3 structure.…”

Section: Resultsmentioning

confidence: 76%

Simple synthesis and characterization of SrSnO3 nanoparticles with enhanced photocatalytic activity

Lee

Kim

Cho

et al. 2012

International Journal of Hydrogen Energy

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“…Stannates such as CaSnO 3 , SrSnO 3 and BaSnO 3 have been reported in the literature as compounds with the classic perovskite structure, with stoichiometry ABO 3 [1,2].…”

Section: Introductionmentioning

confidence: 99%

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

Sales

Bouquet

Députier

et al. 2014

Solid State Sciences

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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 .

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Influence of the modifier on the short and long range disorder of stannate perovskites

Cited by 40 publications

References 16 publications

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

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

Simple synthesis and characterization of SrSnO3 nanoparticles with enhanced photocatalytic activity

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

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