What Are The Applications of Ammonium Metatungstate in the Field of Photocatalysis? 2023-03-02 Tungsten Oxide 138 Ammonium metatungstate has been used as a photocatalyst for the degradation of organic pollutants in water and as a co-catalyst in photoelectrochemical cells for hydrogen production from water. 0 0 ammonium metatungstatephotocatalyst