TIO2 MATERIAL THAT IS ABSORBET IN THE VISIBLE SPECTRUM AND METHOD FOR PRODUCING SAME

摘要

The invention relates to a method for the production of a TiO2 material comprising:
preliminary mixing a titanium alkoxide with an acid;adding water, a phase separator and of an N source to the mixture thereby obtaining a TiO2 gel;washing the TiO2 gel with isopropanol;drying and calcining the TiO2 gel to produce the material.;The invention also relates to a TiO2 material exhibiting an absorbance in the visible spectrum and in particular a light absorption at 500 nm which is greater than 50% of the light absorption at 400 nm, and its use as photocatalyst for the degradation of pollutants in air or water and water splitting into H2, under radiation in the visible spectrum.

主权项

1. A method for the production of a TiO2 material comprising:
preliminary mixing a titanium alkoxide with an acid; adding water, a phase separator and of an N source to the mixture of titanium alkoxide and acid, thereby obtaining a TiO2 gel; washing the TiO2 gel with isopropanol (iPrOH); drying and calcining the TiO2 gel to produce the TiO2 material exhibiting mesoporosity and/or macroporosity and comprising at least 60 wt. %, preferably at least 70 wt. %, TiO2 in the form of anatase and elemental carbon and/or elemental nitrogen in trace amount, the percentages being calculated with respect to the total weight of the material.