Mixture Of SnCl2 Research Articles

Synthesis, characterization, and FTIR study on Sn1−xMnxO2 powders

A mixture of SnCl2 and tris(acetylacetonato)manganese(III) complex was thermally co-decomposed to synthesize Mn-doped SnO2 powders. Two preparation routes were conducted: in the first route, the samples were annealed in air and in the second route, the samples were further annealed in high vacuum. The elemental and crystalline structures of the prepared powders were studied by the X-ray fluorescence (XRF) and X-ray diffraction (XRD) methods. It was confirmed that all the incorporated Mn ions doped in SnO2 forming Sn1 − xMnxO2 substitutional solid solution (x = 0.000, 0.014, 0.024, 0.068). The samples were subjected to an extensive optical characterisation with FTIR and optical absorption methods. The doping processes as well as the vacuum-annealing effect were studied by FTIR method. The optical absorption spectroscopy was used to observe the dependence of the absorption onset on the Mn-doping level. Annealing in vacuum was proved to create more oxygen vacancies.

ChemInform Abstract: Highly Active Iridium/Iridium—Tin/Tin Oxide Heterogeneous Nanoparticles as Alternative Electrocatalysts for the Ethanol Oxidation Reaction.

AbstractCarbon supported Ir71Sn29 catalysts with an average diameter of 2.7 nm are prepared from mixtures of SnCl2, IrCl3, Sn, ethylene glycol, and water (Ar flow, 130 °C, 2 h) followed by mixing the as made Ir71Sn29 particles with carbon black (magnetic stirring, 20 °C, 1 h).

Redução seletiva aplicada à especiação de mercúrio em peixes: uma adaptação do método de Magos

In the selective reduction procedure proposed by Magos SnCl2 was used as reductant for inorganic mercury while total mercury was determined after reduction with a mixture of SnCl2 and CdCl2. The difference between total mercury and inorganic mercury determines the content of organic mercury. The procedure of the present work differs of Magos in that the mercury vapour is carried to the absorption cell after magnetic stirring of the solution in the reaction flask; in the Magos procedure, mercury vapour is carried by bubbling the gas in to the solution. In contrast to the Magos procedure this slight modification overcame the necessity of at calibration by analyte addition, saving time and gainning accuracy.

Synthesis and Structural Characterization of Solid Phases of the Sn(II)–Organophosphonate System: The 1-Dimensional [Sn(HO3PCH2PO3H)] · H2O and the 3-Dimensional [Sn2{O3PC(OH)(CH3)PO3}

The first Sn(II)–organophosphonate solid phases have been prepared and structurally characterized by single crystal X-ray diffraction. The one-dimensional species [Sn(HO3PCH2PO3H)] ·H2O (1) was prepared conventionally from a mixture of SnCl2, CH2(PO3H2)2, and H2O in the mole ratio 1:2.9:8.17 kept at 4°C for 12 h. The three-dimensional phase [Sn2{O3PC(OH)(CH3)PO3}] (2) was prepared hydrothermally from a mixture of SnCl2, CH3C(OH)(PO3H)2, 1,4 diaminopropane · HCl, and H2O in the mole ratio 1:3.87:1.9:2215 with pH adjusted to 3.5 by addition of (CH3)4NOH, heated at 150°C for 135.5 h. Compound 1 consists of linear chains of {SnO3} pyramids bridged by (HO3PCH2PO3H)2−groups. The structure of 2 is a three-dimensional open framework. Crystal data: 1, triclinic P1a= 4.8777(1) Å,b= 8.786(2) Å,c= 9.446(2) Å, α = 84.52(3)°, β = 78.78(3)°, γ = 74.39(3)°,V= 382.0(2) Å3,Z= 2,Dcalc= 2.701 g cm−3, structure solution and refinement based on 1059 reflections converged atR= 0.060; 2, monoclinic P21/c,a= 10.889(2) Å,b= 8.556(2) Å,c= 9.460(2) Å, β = 96.92(2)°,V= 874.9(4) Å3,Dcalc= 3.336 g cm−3, structure solution and refinement based on 1121 reflections, converged atR= 0.055.