Stabilization of Anatase by Tungsten Introduced to the Titania Lattice by Sol-Gel and Impregnation Techniques

A study on the monolayer dispersion of tungsten oxide on anatase

“…It is known that tungsten oxide can stabilize the low temperature anatase phase of TiO 2 and retard the anatase-rutile phase transformation. 10,22 In the present work, it was found that the tungsten oxide could raise the temperature of the anatase-rutile transformation and this effect was strongly related to the loading amount of the tungsten oxide.…”

“…By contrast, tungsten oxide retards the anatase-rutile phase transformation. 10,22 To study the influence of dispersed tungsten oxide on the anatase-rutile transformation, powder X-ray diffraction was used to determine the phase of titania present at different temperatures. Fig.…”

WO3 Modification of MnOx/TiO2 Catalysts for Low Temperature Selective Catalytic Reduction of NO with Ammonia

“…15%MnO x -5%WO 3 /TiO 2 and 5%WO 3 /15MnO x /TiO 2 , the XRD patterns were almost identical except that the weak peak corresponding to rutile TiO 2 (41.23°) had disappeared with the former while all other TiO 2 peaks were stronger than those of the latter sample. According to previous studies, the adding of WO 3 to TiO 2 can stabilize the crystal structure, thus preventing the transition from the anatase to rutile phase [29]. Hence, it was concluded that: (1) the disappearance of the rutile peaks was caused by the addition of WO 3 , (2) the loading of tungsten prior to manganese gave the best dispersion of active components, indicating the strong interaction between the two metal oxides, and (3) the combination of WO 3 and MnO x blocked the transformation from anatase to rutile.…”

Wettability, Photoactivity, and Antimicrobial Activity of Glazed Ceramic Tiles Coated with Titania Films Containing Tungsten

“…However, ions must be carefully chosen to avoid lattice distortions inducing ART, , as well as defects in the TiO 2 matrix which can act as carrier recombination centers . Among the possible ions, tungsten is a good candidate as it stabilizes the anatase phase at temperatures as high as 900 °C . This is a key feature when considering these thin films for industrial applications because the tile manufacturing process requires high furnace temperatures.…”

“…18 Among the possible ions, tungsten is a good candidate as it stabilizes the anatase phase at temperatures as high as 900 °C. 19 This is a key feature when considering these thin films for industrial applications because the tile manufacturing process requires high furnace temperatures.…”