P-Doped Titania Xerogels as Efficient UV-Visible Photocatalysts

Céline J. Bodson (1) , Sophie L. Pirard (1) , René Pirard (1) , Ludivine Tasseroul (1) , Catherine Bied (2) , Michel Wong Chi Man (2) , Benoît Heinrichs (1) , Stéphanie Lambert (1)

1 Laboratory of Chemical Engineering - Nanomaterials, Catalysis, Electrochemistry
2 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

In the present study, sol-gel process is used to synthesize P-doped TiO2 xerogels by the cogelation method of a functionalized P alkoxide, (NH2-(CH2)2-NH-(CH2)2-P(O)-(OC2H5)2) with Ti(OC3H7)4 in either 2-methoxyethanol or isopropanol. The phosphorus-doping improved the thermal stability of titania and decreased the phase transformation of anatase into rutile. This modification by phosphorus shifted the absorption edge of titania to the visible region as proved by Diffuse reflectance measurements, and thus offers the possibility to produce visible light effective TiO2 hotocatalyst. The excellent photocatalytic activity of P-doped TiO2 xerogels compared to pure TiO2 could be explained by its high surface area and small TiO2-anatase crystallite size. From these results, it was proved by using three different models that phosphorus intrinsically influences the photocatalytic activity.

Mots clés: TiO2 xerogel; Phosphorus-Doping; Sol-Gel; p-Nitrophenol Degradation; Photocatalysis

Domaines: Matériaux

Céline J. Bodson, Sophie L. Pirard, René Pirard, Ludivine Tasseroul, Catherine Bied, et al.. P-Doped Titania Xerogels as Efficient UV-Visible Photocatalysts. Journal of Materials Science and Chemical Engineering, 2014, 2, pp.17-32. ⟨10.4236/msce.2014.28004⟩. ⟨hal-01069636⟩