Pyrolysis of organotin compounds: A preparative method for nanometric tin dioxide powders

Pereira, Alline Gomes; Porto, A.O.; Silva, Glaura G.; Lima, Geraldo Μ. de; Siebald, Helmuth G.L.; Neto, Jonas Leal

doi:10.1039/b204476p

Cited by 17 publications

(4 citation statements)

References 15 publications

(11 reference statements)

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“…[21] The thermal decomposition of diphenyl and triphenyltin pyrrolidinedithiocarbamate complexes [22] or of the asymmetric dithiocarbamate organotin complexes [SnMe 3 {S 2 CN(Bu)(Me)}] and [SnPh{S 2 CN(Bu)(Me)} 3 ] [23] yielded mixtures of SnS and Sn 2 S 3 . In contrast to Sn-based oxide materials [24,25] widely prepared by pyrolysis technique, this methodology has been less used for tin-sulfide-containing materials [26,27] Other works have investigated the thermal decomposition of a number of organotin(IV) thiozolate-based derivatives. [28,29] Recently an interesting approach has been described in the literature, involving solvothermal decomposition of dithiocarbamate tin(II) precursor.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of phase‐pure SnS particles employing dithiocarbamate organotin(IV) complexes as single source precursors in thermal decomposition experiments

Menezes

Lima

Carvalho

et al. 2010

Applied Organom Chemis

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Preparation of tin(II ] (4). Phase-pure tin(II) sulfide has been obtained by pyrolysis of these precursors at 350• C in N 2 . Thermogravimetric analysis, X-ray powder diffraction, scanning electron microscopy, X-ray electron probe microanalysis and 119 Sn Mössbauer spectroscopy revealed that the complexes decompose in a single and sharp step (1 and 2), or in pseudo-single stage (3 and 4), to produce SnS. We have also measured the bandgap energies of the residues using electronic spectroscopy in the solid state and the result relates well to that in the literature for SnS, 1.3 eV. A decomposition mechanism was also proposed for each complex based on electrospray ionization tandem mass spectrometric results. The synthetic method used in this work might be useful for the preparation of pure SnS on a large scale.

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Section: Introductionmentioning

confidence: 99%

Synthesis of phase‐pure SnS particles employing dithiocarbamate organotin(IV) complexes as single source precursors in thermal decomposition experiments

Menezes

Lima

Carvalho

et al. 2010

Applied Organom Chemis

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“…[19] Our group, for example, has employed the thermal decomposition of organotin oxides to prepare nano-particles of SnO 2 . [20] On this matter we have found that the choice of a particular organotin precursor is of some importance. [21 -28] The most significant application of SnO 2 is as gas sensors.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a new composite by reaction of SnBu₃Cl with TiCl₄ in the presence of NH₄OHphotocatalytic degradation of indigo carmine

Coelho

Andrade

Lima

et al. 2010

Applied Organom Chemis

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Reactions of SnBu 3 Cl, TiCl 4 and NH 4 OH in ethanol followed by pyrolysis of the resultant product at 550• C, either in an atmosphere of oxygen or hydrogen, yielding new SnO 2 -TiO 2 based composites. In all, eight products were prepared with weight ratios of Sn-TiO 2 of 0% (1), 5% (2), 15% (3) and 30% (4) in O 2 and 0% (5), 5% (6), 15% (7) and 30% (8) in H 2 . XRD revealed diffraction patterns of TiO 2 (anatase) in the composites, but not those of SnO 2 due to its insufficient crystallinity. Scanning electron microscopy indicated the presence of Sn metal on the surface of composites 6-8. 119 Sn Mössbauer experiments revealed SnO 2 in all samples, and increasing amounts of tin in samples 7 and 8, respectively. The composites were used in experiments of photocatalytic degradation of indigo carmine dye. The catalytic experiments monitored by mass spectrometry and electronic spectroscopy revealed that, in the conditions of the experiments, composite 8 displays the highest activity. In addition, degradation products were characterised using electrospray ionization mass spectrometry (ESI-MS and ESI-MS/MS) data.

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“…1,3,4 In particular, SnO 2 film with a wide band gap of 3.6 eV at RT is generally used as gas sensors, transparent conducting electrodes, dye-based solar cells, and catalysts, etc. 4,5 The first report of hightemperature FM in SnO 2 film was presented by Ogale et al, 6 who described a Curie temperature of about 650 K in Co-doped film with the 5% composition and a large moment of 7.5 m B per Co ion. Subsequently, SnO 2 becomes a promising material in the DMS field and is useful for potential applications requiring the combined magnetic and optical functionality.…”

Section: Introductionmentioning

confidence: 99%

Electronic structures and excitonic transitions in nanocrystalline iron-doped tin dioxide diluted magnetic semiconductor films: an optical spectroscopic study

Jiang

et al. 2011

Phys. Chem. Chem. Phys.

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Nanocrystalline iron-doped tin dioxide (Sn(1-x)Fe(x)O(2)) films with x from 0 to 0.2 were prepared on c-sapphire substrates by pulsed laser deposition. X-ray diffraction and Raman scattering analysis show that the films are of the rutile structure at low compositions and an impurity phase related to Fe(2)O(3) appears until the x is up to 0.2, suggesting the general change of lattice structure due to the Fe ion substitution. The dielectric functions are successfully determined from 0.0248 to 6.5 eV using the Lorentz multi-oscillator and Tauc-Lorentz dispersion models in the low and high photon energy regions, respectively. With increasing Fe composition, the highest-frequency transverse optical phonons E(u) shifts towards a lower energy side and can be well described by (608 - 178x) cm(-1). From the transmittance spectra, the fundamental absorption edge is found to be decreased with the Fe composition due to the joint contributions from SnO(2) and Fe(2)O(3). It can be observed that the doped films exhibit evident excitonic excitation features, which are strongly related to the Fe doping. Among them, the 6A(1g)→ 4T(2g) transition contributes to the onset of optical absorption. Moreover, the remarkable intensity reduction and a red-shift trend with the doping composition, except for the pure film, can be testified by the photoluminescence spectra. It can be concluded that the replacement of Sn with the Fe ion could induce the 2p-3d hybridization and result in the electronic band structure modification of the Sn(1-x)Fe(x)O(2) films.

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Pyrolysis of organotin compounds: A preparative method for nanometric tin dioxide powders

Cited by 17 publications

References 15 publications

Synthesis of phase‐pure SnS particles employing dithiocarbamate organotin(IV) complexes as single source precursors in thermal decomposition experiments

Synthesis of phase‐pure SnS particles employing dithiocarbamate organotin(IV) complexes as single source precursors in thermal decomposition experiments

Preparation of a new composite by reaction of SnBu₃Cl with TiCl₄ in the presence of NH₄OHphotocatalytic degradation of indigo carmine

Electronic structures and excitonic transitions in nanocrystalline iron-doped tin dioxide diluted magnetic semiconductor films: an optical spectroscopic study

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Pyrolysis of organotin compounds: A preparative method for nanometric tin dioxide powders

Cited by 17 publications

References 15 publications

Synthesis of phase‐pure SnS particles employing dithiocarbamate organotin(IV) complexes as single source precursors in thermal decomposition experiments

Synthesis of phase‐pure SnS particles employing dithiocarbamate organotin(IV) complexes as single source precursors in thermal decomposition experiments

Preparation of a new composite by reaction of SnBu3Cl with TiCl4 in the presence of NH4OHphotocatalytic degradation of indigo carmine

Electronic structures and excitonic transitions in nanocrystalline iron-doped tin dioxide diluted magnetic semiconductor films: an optical spectroscopic study

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Preparation of a new composite by reaction of SnBu₃Cl with TiCl₄ in the presence of NH₄OHphotocatalytic degradation of indigo carmine