Author
A. Cygański
Bio: A. Cygański is an academic researcher. The author has contributed to research in topics: Decomposition & Thermal decomposition. The author has an hindex of 1, co-authored 1 publications receiving 21 citations.
Topics: Decomposition, Thermal decomposition, Alkali metal, Bismuth
Papers
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TL;DR: In this article, the thermal decomposition of thiosulphatobismuthates (III) of alkali metals was investigated and the results obtained in thermal, X-ray, chemical and spectrophotometrical analyses of the decomposition products are shown.
Abstract: The thermal decomposition of thiosulphatobismuthates(III) of alkali metals was investigated. The general formulae of the thiosulphatobismuthates are M3[Bi(S2O3)3]·H2O where M = Na, K, Rb or Cs, and M2Na[Bi(S2O3)3]·H2O where M = K or Cs.
Typical thermal curves for thiosulphatobismuthates(III) and the results obtained in thermal, X-ray, chemical and spectrophotometrical analyses of the decomposition products are shown. The results were used to determine three stages of the thermal decomposition. At the first stage, at about 200°C, hydrated compounds are dehydrated. At the second stage, above 200°C, there is a rapid decrease in mass which is caused by evolving sulphur dioxide; bismuth sulphide and an intermediate decomposition product are formed. At about 320°C the thermal decomposition products are bismuth sulphide and alkali metal sulphate.
21 citations
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TL;DR: Bismuth sulfide nanorods have been successfully prepared by a sonochemical method from an aqueous solution of bismuth nitrate and sodium thiosulfate in the presence of complexing agents as mentioned in this paper.
Abstract: Bismuth sulfide nanorods have been successfully prepared by a sonochemical method from an aqueous solution of bismuth nitrate and sodium thiosulfate in the presence of complexing agents. Bismuth su...
207 citations
TL;DR: In this paper, a Bi 2 S 3 nanorod with a diameter of 10 nm and a length of up to 300 nm was successfully prepared from a formaldehyde solution of bismuth nitrate and thiourea by microwave irradiation.
Abstract: Bi 2 S 3 nanorods, with a diameter of ca. 10 nm and a length of up to ca. 300 nm, have been successfully prepared from a formaldehyde solution of bismuth nitrate and thiourea by microwave irradiation. Powder X-ray diffraction (XRD) pattern indicates that the product is pure orthorhombic Bi 2 S 3 phase. The product is also characterized by the techniques of transmission electron microscopy (TEM) and X-ray photoelectron spectra (XPS).
130 citations
TL;DR: Results from pyrolysis of (BnS)(3)Bi demonstrate that this compound is a convenient precursor to phase-pure, polycrystalline Bi(2)S(3) with low carbon and hydrogen contamination under mild thermal conditions.
Abstract: Details of the synthesis, physical and spectroscopic characterization, and thermal decomposition of tris(benzylthiolato)bismuth, (BnS){sub 3}Bi, Bn = CH{sub 2}C{sub 6}H{sub 5}, are presented. Results from pyrolysis of (BnS){sub 3}Bi demonstrate that this compound is a convenient precursor to phase-pure, polycrystalline Bi{sub 2}S{sub 3} with low carbon and hydrogen contamination under mild thermal conditions (ca. 275 C). Flow-tube pyrolysis produces small ({approximately} 1 {micro}m) spherical particles, whereas sealed-tube pyrolysis produces 6-{micro}m diameter spherical particles composed of radiating acicular crystallites. Bi{sub 2}S{sub 3} was characterized by X-ray powder diffraction and scanning electron microscopy.
118 citations
01 Jan 2001
TL;DR: In this article, a Bi2S3 nanorod with a diameter of 10 nm and a length of up to 300 nm was successfully prepared from a formaldehyde solution of bismuth nitrate and thiourea by microwave irradiation.
Abstract: Bi2S3 nanorods, with a diameter of ca. 10 nm and a length of up to ca. 300 nm, have been successfully prepared from a formaldehyde solution of bismuth nitrate and thiourea by microwave irradiation. Powder X-ray diffraction (XRD) pattern indicates that the product is pure orthorhombic Bi2S3 phase. The product is also characterized by the techniques of transmission electron microscopy (TEM) and X-ray photoelectron spectra (XPS). © 2001 Elsevier Science Ltd. All rights reserved.
114 citations
TL;DR: In this article, a one-step solvothermal decomposition process (SDP) was successfully developed for fabrication of Bi2S3 nanowires via a reaction between BiCl3 and thiourea in polar solvents at 140 °C for 6-12 h. The yield was as high as 98%.
Abstract: A novel one-step solvothermal decomposition process (SDP) was successfully developed for fabrication of Bi2S3 nanowires via a reaction between BiCl3 and thiourea in polar solvents at 140 °C for 6–12 h. The influence of solvents, reaction temperature, and reaction time on the formation of Bi2S3 nanowires was investigated. The yield was as high as 98%. The particle sizes of Bi2S3 nanowires are controlled by the choice of solvents. The possible formation mechanism of Bi2S3 nanowires via the so-called SDP method is proposed. The present technique is expected to synthesize other nanostructural metal chalcogenides under mild conditions.
90 citations