H2 production by γ and He ions water radiolysis, effect of presence TiO2 nanoparticles

R. Essehli, F. Crumière, G. Blain, J. Vandenborre, F. Pottier, B. Grambow, M. Fattahi, M. Mostafavi

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Abstract

The effect of TiO2 particles on the yield of H2 formation under water radiolysis is measured. Irradiations were performed using a 60Co γ-ray source as well as with He ions particles (4He2+) generated by a cyclotron with an external beam energy of 6 MeV. The resulting hydrogen as a stable product of radiolysis was measured by mass spectrometry. G(H2) obtained for water radiolysis by He ions-irradiation in aerated and argon water are found to be 1.91 × 10 -7 and 1.35 × 10-7 mol J-1, respectively. In the presence of titanium oxide anatase-type dispersed in water, under He ions-irradiation, G(H2) is found to increase slightly from 1.04 × 10-7 to 1.35 × 10-7 mol J-1 by increasing the specific surface from 8 to 253 m2/g, respectively. Under γ-irradiation, G(H2) is found to be 0.41 × 10 -7 mol J-1 close to primary yield of hydrogen in presence of OH. Radical scavenger. In addition, radiolysis of water adsorbed in the titanium oxide with low water content, which corresponds to a few layers of water sorbed onto the solid surface gives a huge values of the G(H2). For the same amount of water, with using the dose absorbed by TiO2 particles, for He ions-irradiation, G(H2) increases from 14.5 × 10-7 to 35 × 10-7 mol J-1 by increasing the surface area of TiO2 nanoparticles from 4 to 52 m2/g, respectively. For γ-irradiation G(H2) is found to be 5.25 × 10-7 mol J-1 for the sample with 8 m2/g specific surface area.

Original languageEnglish
Pages (from-to)14342-14348
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number22
DOIs
Publication statusPublished - 1 Nov 2011

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Keywords

  • Cyclotron
  • He ions-particles
  • Hydrogen
  • Water radiolysis
  • γ-Rays

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Essehli, R., Crumière, F., Blain, G., Vandenborre, J., Pottier, F., Grambow, B., Fattahi, M., & Mostafavi, M. (2011). H2 production by γ and He ions water radiolysis, effect of presence TiO2 nanoparticles. International Journal of Hydrogen Energy, 36(22), 14342-14348. https://doi.org/10.1016/j.ijhydene.2011.05.136