New cerium and/or tungsten modified V2O5–TiO2 aerogel catalysts (V2O5–TiO2,V2O5–WO3–TiO2, V2O5–CeO2–TiO2 and V2O5–WO3–CeO2–TiO2) were successfully developed, by associating the sol gel procedure supercritical drying approach. A combination of various analytical techniques, including XRD, N2-Physisorption at 77 ?K, DRUV-Vis spectroscopy, NH3-TPD H2-TPR, was used to characterize obtained solids. ...

The partial substitution of zirconium for praseodymium in a ceria-zirconia support was studied WO3 or Nb2O5 supported catalysts dedicated to the NOx SCR by NH3. This favored reducibility, but both niobium and tungsten impregnation strongly inhibited redox behaviors support. Concomitantly, also provided acidic sites noticeably ammonia storage, especially WO3-containing sample. Finally, drastical...

Plate-like hydrated tungsten trioxide (3WO(3)·H(2)O) films were grown on a fluorine doped tin oxide (FTO) coated transparent conductive substrate via an efficient, facile and template-free hydrothermal method. The film exhibited a fast coloration/bleaching response (t(c90%) = 4.3 s and t(b90%) = 1.4 s) and a high coloration efficiency (112.7 cm(2) C(-1)), which were probably due to a large surf...

A photocatalyst absorbs light and promotes a chemical reaction. Photocatalysis has received much attention in recent years because of its pollutant degrading properties, which offer important economic benefits. Although titanium dioxide is the most used photocatalyst, it difficult to use indoors illumination by ultraviolet rays produces photocatalytic functions. One method using visiblelight-re...

The design and synthesis of porous tungsten oxide (WO3) are challenging issues. tunability oxide's structures properties allows researchers to gain more understanding how different methods, precursors, additives affect its morphology. Read about these topics in the Minireview by P. Bastakoti et al. on page 9241 ff.

The present study investigated phase equilibria in the Na2O-SiO2-WO3 system experimentally using high-temperature equilibration, quenching, and electron probe X-ray microanalysis (EPMA). New thermodynamic information on was derived based newly obtained experimental results data from literature. primary fields of sodium metasilicate, disilicate, tridymite were determined along with isotherms at ...