The role of structural factors in the formation of gas sensing properties of TiO2 – Fe2O3 nanocomposites

Authors

  • Natallia E. Babaryka Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk
  • Dmitriy V. Sviridov Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk

Keywords:

oxide composite, chemical gas sensor, titanium dioxide, iron(III) oxide
Supporting Agencies
The work was partially supported by Belarusian Republican Foundation for Fundamental Research (grant number Х15-078).

Abstract

TiO2 – Fe2O3 composites with iron oxide content in the range of 1–50 mol. % were synthesized by sol-gel method. By means of X-ray diffraction analysis, scanning electron microscopy and IR spectroscopy the dependence of composite structure on the oxide molar ratio and annealing temperature was established. With the use of the synthesized oxide materials semiconductor gas sensors were fabricated. The possibility of low temperature detection of ethanol vapor with sensor at power consumption of 20 mW was shown. Correlation between the gas sensing activity of the composites towards ethanol vapor and structural characteristics of the composites was revealed. The highest output signal value has been attained for TiO2 – Fe2O3 composite with 50 mol. % content of iron oxide heated below 400 °C. This material consists of two oxide phases (anatase and g-Fe2O3 ) and possesses a developed surface.

Author Biographies

  • Natallia E. Babaryka, Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk

    PhD (chemistry); associate professor at the department of inorganic chemistry, faculty of chemistry

  • Dmitriy V. Sviridov, Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk

    corresponding member of the National Academy of Sciences of Belarus, doctor of science (chemistry); dean of the faculty of chemistry

References

  1. Qiu J., Zhang S., Zhao H. Recent applications of TiO2 nanomaterials in chemical sensing in aqueous media. Sens. Actuators B. 2011. Vol. 160, issue 1. P. 875–890. DOI: 10.1016/j.snb.2011.08.077.
  2. Tanmay K., Chakrabortya M., Pramanik P. Ghorai Photocatalytic performance of nano-photocatalyst from TiO2 and Fe2O3 by mechanochemical synthesis. J. Alloy. Compd. 2011. Vol. 509, issue 32. Р. 8158–8164. DOI: 10.1016/j.jallcom.2011.05.069.
  3. Chen S., Zhang Y., Han W., et al. Synthesis and magnetic properties of Fe2O3 – TiO2 nanocomposite particles using pulsed laser gas phase evaporation-liquid phase collecting method. Appl. Surf. Sci. 2013. Vol. 283. P. 422–429. DOI: 10.1016/j.apsusc.2013.06.125.
  4. Wang T., Yang G., Liu J., et al. Orthogonal synthesis, structural characteristics, and enhanced visible-light photocatalysis of mesoporous Fe2O3 – TiO2 heterostructured microspheres. Appl. Surf. Sci. 2014. Vol. 311. Р. 314–323. DOI: 10.1016/j.apsusc.2014.05.060.
  5. Palanisamy B., Babu C. M., Sundaravel B., et al. Sol-gel synthesis of mesoporous mixed Fe2O3 / TiO2 photocatalyst: Application for degradation of 4-chlorphenol. J. Hazard. Mater. 2013. Vol. 252. Р. 233–242. DOI: 10.1016/j.jhazmat.2013.02.060.
  6. Zhou W., Fu H., Pan K., et al. Mesoporous TiO2 /a – Fe2O3: bifunctional composites for effective elimination of arsenite contamination through simultaneous photocatalytic oxidation and adsorption. J. Phys. Chem. C. 2008. Vol. 112, No. 49. P. 19584–19589. DOI: 10.1021/jp806594m.
  7. Boboriko N. E., Mychko D. I. Thermally stimulated transformations of sol-gel derived TiO2 / MoO3 composites. Neorg. Materialy [Inorg. Mater.]. 2013. Vol. 49, No. 8. P. 853–859. DOI: 10.7868/S0002337X13080022 (in Russ.).
  8. Kandori K., Aoki Y., Yasukawa A., et al. Effects of metal ions on the morphology and structure of haematite particles produced from forced hydrolysis reaction. J. Mater. Chem. 1998. Vol. 8. P. 2287–2292. DOI: 10.1039/A802938E.

Downloads

Published

2017-12-01

Issue

No. 2 (2017): Journal of the Belarusian State University. Chemistry

Section

Original Articles

License

The authors who are published in this journal agree to the following:

  1. The authors retain copyright on the work and provide the journal with the right of first publication of the work on condition of license Creative Commons Attribution-NonCommercial. 4.0 International (CC BY-NC 4.0).
  2. The authors retain the right to enter into certain contractual agreements relating to the non-exclusive distribution of the published version of the work (e.g. post it on the institutional repository, publication in the book), with the reference to its original publication in this journal.
  3. The authors have the right to post their work on the Internet (e.g. on the institutional store or personal website) prior to and during the review process, conducted by the journal, as this may lead to a productive discussion and a large number of references to this work. (See The Effect of Open Access.)

How to Cite

[1]
Babaryka, N.E. and Sviridov, D.V. 2017. The role of structural factors in the formation of gas sensing properties of TiO2 – Fe2O3 nanocomposites. Journal of the Belarusian State University. Chemistry. 2 (Dec. 2017), 14–20.