Sulfurization of hematite Fe2O3 and anatase TiO2 by annealing in H2S

Woo Jung Shin; Araceli Hernández Granados; Wen Hsi Huang; Hailin Hu; Meng Tao

doi:10.1016/j.matchemphys.2018.10.008

Sulfurization of hematite Fe₂O₃ and anatase TiO₂ by annealing in H₂S

Woo Jung Shin, Araceli Hernández Granados, Wen Hsi Huang, Hailin Hu, Meng Tao

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Spray-deposited hematite Fe₂O₃ and spin-coated anatase TiO₂ thin films were annealed under H₂S in order to investigate the effect of sulfurization by H₂S. Sulfurized films were characterized using UV–vis spectrophotometry, X-ray diffractometry, Raman spectroscopy, field-emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Sulfurized Fe₂O₃ and TiO₂ films are composed of multiple phases. The Fe₂O₃ film undergoes phase transformation from hematite into a mixture of magnetite (Fe₃O₄) and pyrrhotite (FeS) at annealing temperatures above 250 °C. At 450 °C α-Fe₂O₃ is fully transformed into pyrite (FeS₂). The TiO₂ film transforms into a mixture of TiO₂ and TiS₂. TiS₂ formation begins at temperatures above 550 °C. At 700 °C, TiO₂ is completely transformed into TiS₂.

Original language	English (US)
Pages (from-to)	152-158
Number of pages	7
Journal	Materials Chemistry and Physics
Volume	222
DOIs	https://doi.org/10.1016/j.matchemphys.2018.10.008
State	Published - Jan 15 2019

Keywords

Anatase TiO2
H2S
Hematite Fe2O3
Sulfurization

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/j.matchemphys.2018.10.008

Cite this

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title = "Sulfurization of hematite Fe2O3 and anatase TiO2 by annealing in H2S",

abstract = "Spray-deposited hematite Fe2O3 and spin-coated anatase TiO2 thin films were annealed under H2S in order to investigate the effect of sulfurization by H2S. Sulfurized films were characterized using UV–vis spectrophotometry, X-ray diffractometry, Raman spectroscopy, field-emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Sulfurized Fe2O3 and TiO2 films are composed of multiple phases. The Fe2O3 film undergoes phase transformation from hematite into a mixture of magnetite (Fe3O4) and pyrrhotite (FeS) at annealing temperatures above 250 °C. At 450 °C α-Fe2O3 is fully transformed into pyrite (FeS2). The TiO2 film transforms into a mixture of TiO2 and TiS2. TiS2 formation begins at temperatures above 550 °C. At 700 °C, TiO2 is completely transformed into TiS2.",

keywords = "Anatase TiO2, H2S, Hematite Fe2O3, Sulfurization",

author = "Shin, {Woo Jung} and Granados, {Araceli Hern{\'a}ndez} and Huang, {Wen Hsi} and Hailin Hu and Meng Tao",

note = "Funding Information: Financial support for this project was provided by the U.S. National Science Foundation under grant no. DMR-1306542 . WJS thanks Emmanuel Soignard for valuable discussions on X-ray diffraction data. Funding Information: Financial support for this project was provided by the U.S. National Science Foundation under grant no. DMR-1306542. WJS thanks Emmanuel Soignard for valuable discussions on X-ray diffraction data. Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

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doi = "10.1016/j.matchemphys.2018.10.008",

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AU - Shin, Woo Jung

AU - Granados, Araceli Hernández

AU - Huang, Wen Hsi

AU - Hu, Hailin

AU - Tao, Meng

N1 - Funding Information: Financial support for this project was provided by the U.S. National Science Foundation under grant no. DMR-1306542 . WJS thanks Emmanuel Soignard for valuable discussions on X-ray diffraction data. Funding Information: Financial support for this project was provided by the U.S. National Science Foundation under grant no. DMR-1306542. WJS thanks Emmanuel Soignard for valuable discussions on X-ray diffraction data. Publisher Copyright: © 2018 Elsevier B.V.

PY - 2019/1/15

Y1 - 2019/1/15

N2 - Spray-deposited hematite Fe2O3 and spin-coated anatase TiO2 thin films were annealed under H2S in order to investigate the effect of sulfurization by H2S. Sulfurized films were characterized using UV–vis spectrophotometry, X-ray diffractometry, Raman spectroscopy, field-emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Sulfurized Fe2O3 and TiO2 films are composed of multiple phases. The Fe2O3 film undergoes phase transformation from hematite into a mixture of magnetite (Fe3O4) and pyrrhotite (FeS) at annealing temperatures above 250 °C. At 450 °C α-Fe2O3 is fully transformed into pyrite (FeS2). The TiO2 film transforms into a mixture of TiO2 and TiS2. TiS2 formation begins at temperatures above 550 °C. At 700 °C, TiO2 is completely transformed into TiS2.

AB - Spray-deposited hematite Fe2O3 and spin-coated anatase TiO2 thin films were annealed under H2S in order to investigate the effect of sulfurization by H2S. Sulfurized films were characterized using UV–vis spectrophotometry, X-ray diffractometry, Raman spectroscopy, field-emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Sulfurized Fe2O3 and TiO2 films are composed of multiple phases. The Fe2O3 film undergoes phase transformation from hematite into a mixture of magnetite (Fe3O4) and pyrrhotite (FeS) at annealing temperatures above 250 °C. At 450 °C α-Fe2O3 is fully transformed into pyrite (FeS2). The TiO2 film transforms into a mixture of TiO2 and TiS2. TiS2 formation begins at temperatures above 550 °C. At 700 °C, TiO2 is completely transformed into TiS2.

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