Enhancing selectivity in photocatalytic formation of p-anisaldehydein aqueous suspension under solar light irradiation via TiO2 N-doping

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Abstract

The photocatalytic partial oxidation of 4-methoxybenzyl alcohol to the corresponding aldehyde (p-anisaldehyde) was performed under simulated solar irradiation by using home prepared N-doped TiO2 catalysts. The photocatalysts were prepared by a sol–gel method, using TiCl4 as TiO2 precursor and NH4Cl, urea or NH4OH as N-doping sources. A commercial TiO2 (Degussa P25) was also used for comparison aims. The prepared catalysts were characterized by BETspecific surface area, XRD, ESEM and UV-vis spectroscopy. The reactivity results show that (i) the doped catalysts are predominantly amorphous, and they show selectivity values far higher than those of the corresponding undoped ones and of well crystallized catalysts – even if the last ones show a higher activity – and (ii) exploitation of solar light significantly increases the reaction selectivity. In addition, different light sources were also used in order to investigate the effect of radiation wavelength ranges on the reactivity and selectivity to aldehyde.
Lingua originaleEnglish
pagine (da-a)1762-1768
Numero di pagine7
RivistaNew Journal of Chemistry
Volume36
Stato di pubblicazionePublished - 2012

All Science Journal Classification (ASJC) codes

  • Catalysis
  • ???subjectarea.asjc.1600.1600???
  • Materials Chemistry

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