Photocatalyst having an x-ray diffraction pattern which is subst

Details Photocatalyst having an x-ray diffraction pattern which is subst Photocatalyst having an x-ray diffraction pattern which is subst

1997-08-29

1999-11-09

Lewis, Michael

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502 4, 502 5, 502305, 502350, B01J 3734, B01J 2106, B01J 2330

Patent

active

059814268

ABSTRACT:
A photocatalyst compound comprising: (i) a photocatalyst selected from the group consisting of TiO.sub.2, WO.sub.3 and mixtures thereof, the photocatalyst being substantially free of sharp, narrow band X-ray reflections at angles corresponding those of crystalline TiO.sub.2, WO.sub.3 and mixtures thereof, and (ii) a porous, crystalline, adsorbent support material. A process for producing the photocatalyst compound is also disclosed. The process comprises: (i) hydrolysing a non-ionic titanium compound to produce a colloidal suspension having an average particle size of less than about 250 .ANG.; (ii) contacting a porous, crystalline, adsorbent support material with the colloidal suspension to produce an impregnated support; and (iii) calcining the impregnated support to produce the photocatalyst compound. The photocatalyst compound is useful, in the treatment of a fluid containing an organic pollutant.

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