Although the selective catalytic reduction (SCR) of NOx is the most effective way to reduce related emissions,the V2O5-WO3/TiO2 catalyst which is most used for this purpose has a narrow operation temperaturerange of 300–400 C and, therefore, has limited applicability. Hence, better catalysts with moreabundant active sites and a wider range of acceptable temperatures (240–450 C) are required, especiallybecause heating at 350 C allows for removal of ammonium sulfate, a catalyst poison that is formed duringSCR. Herein, we aim to produce such catalysts by treating the TiO2 support with titanium isopropoxide(TTIP) at several TTIP/TiO2 mass ratios, as this treatment is expected to increase the number ofcatalytically active sites and facilitate the dispersal of active materials. The optimal performance, whichwas observed for the catalyst prepared at a TTIP loading of 5 wt%, was ascribed to the increased thermalstability caused by the high extent of W dispersion and the formation of V4+ by the reaction of V5+ withsurface Ti3+. Therefore, these results pave the way for the fabrication of more efficient NOx removalcatalysts.