Transport properties and photo electrochemical characterization of oxygen-deficient ASnO3−δ (A=Ca, Sr and Ba)

Zidi, Naima; Omeiri, S.; Hadjarab, B.; Bouguelia, A.; Akroun, A.; Trari, M.

doi:10.1016/j.physb.2010.05.004

Cited by 27 publications

(4 citation statements)

References 19 publications

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“…Interestingly, Zidi et al [27] reported that the oxygen-deficient BaSnO 3 ceramics prepared under low pressure in sealed tube exhibit semiconducting behavior with the room-temperature conductivity of s 300K ¼ 1.63 U À1 cm À1 . However, recently there are theoretical studies on conductivity of the undoped BaSnO 3 , and the results demonstrate that native defects cannot cause high levels of n-type conductivity [28].…”

Section: Introductionmentioning

confidence: 99%

High electrical conductivity in oxygen deficient BaSnO3 films

Liu

Dai

Zhang

et al. 2016

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

High electrical conductivity in oxygen deficient BaSnO3 films

Liu

Dai

Zhang

et al. 2016

Journal of Alloys and Compounds

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“…Strontium stannate (SrSnO 3 ) is a type of ABO 3 perovskite, at which A is commonly an alkaline earth such as Ca, Sr, and Ba, and B is a p-block posttransition metal in the periodic table. ABO 3 perovskite has been used for energy conversion, lithium ion batteries, stable capacitors, oxygen-permeable ceramic membranes, and gas sensors [1][2][3][4]. In recent years, SrSnO 3 has been widely used in photocatalytic applications [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Decolorization of Methylene Blue by Ag/SrSnO₃ Composites under Ultraviolet Radiation

Junploy

Thongtem

et al. 2014

Journal of Nanomaterials

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SrSn(OH)6 precursors synthesized by a cyclic microwave radiation (CMR) process were calcined at 900°C for 3 h to form rod-like SrSnO3. Further, the rod-like SrSnO3 and AgNO3 in ethylene glycol (EG) were ultrasonically vibrated to form rod-like Ag/SrSnO3 composites, characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electron microscopy (EM), Fourier transform infrared (FTIR) spectroscopy, and UV-visible analysis. The photocatalyses of rod-like SrSnO3, 1 wt%, 5 wt%, and 10 wt% Ag/SrSnO3 composites were studied for degradation of methylene blue (MB, C16H18N3SCl) dye under ultraviolet (UV) radiation. In this research, the 5 wt% Ag/SrSnO3 composites showed the highest activity, enhanced by the electron-hole separation process. The photoactivity became lower by the excessive Ag nanoparticles due to the negative effect caused by reduction in the absorption of UV radiation.

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“…However, Ba 2 SnO 4 is a low polaron semiconductor and the crystallite size plays a crucial role due to the increasing number of photocatalytic sites. Because of inherent defects in polycrystalline materials and low carrier mobility (Zidi et al 2010), a large part of electron/hole (e -/h ? ) pairs are lost in the inter-grain regions, thus resulting in a poor photo activity.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of nano structured Ba2SnO4 as a novel photocatalyst material for the chromate reduction

et al. 2013

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The photo-electrochemical properties of the layered perovskite Ba 2 SnO 4 , prepared by nitrate route are reported for the first time. The oxide exhibits a direct optical transition at 2.98 eV, attributed to the charge transfer O 2-: 2p ? Sn 4? : 5s and possesses a chemical stability over the whole pH range. The Mott Schottky plot in acidic medium is characteristic of n type conductivity with a flat band potential E fb of -0.84 V SCE and an electron density N D of 1.14 9 10 17 cm -3 . The electrochemical impedance spectroscopy reveals the bulk and grain boundaries contributions. Ba 2 SnO 4 is of interest for the environmental protection. At pH 2.5, its conduction band (CB, -0.86 V SCE ) is below the HCrO 4 -level, yielding a spontaneous reduction to Cr 3? under UV light. The reduction is optimized with respect to the Cr(VI) concentration. The photo reduction follows a pseudo-first-order kinetic and the data fit well the Langmuir-Hinshelwood (L-H) model with an apparent rate constant of 0.18 h -1 for an initial concentration of 50 ppm. The chromate reduction under solar light is studied under optimized conditions. In presence of oxalic acid, 73 % of initial concentration disappears after *2 h of irradiation.

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Transport properties and photo electrochemical characterization of oxygen-deficient ASnO3−δ (A=Ca, Sr and Ba)

Cited by 27 publications

References 19 publications

High electrical conductivity in oxygen deficient BaSnO3 films

High electrical conductivity in oxygen deficient BaSnO3 films

Decolorization of Methylene Blue by Ag/SrSnO₃ Composites under Ultraviolet Radiation

Preparation and characterization of nano structured Ba2SnO4 as a novel photocatalyst material for the chromate reduction

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Transport properties and photo electrochemical characterization of oxygen-deficient ASnO3−δ (A=Ca, Sr and Ba)

Cited by 27 publications

References 19 publications

High electrical conductivity in oxygen deficient BaSnO3 films

High electrical conductivity in oxygen deficient BaSnO3 films

Decolorization of Methylene Blue by Ag/SrSnO3 Composites under Ultraviolet Radiation

Preparation and characterization of nano structured Ba2SnO4 as a novel photocatalyst material for the chromate reduction

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Decolorization of Methylene Blue by Ag/SrSnO₃ Composites under Ultraviolet Radiation