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Enhanced chlorobenzene oxidation over V–TiO2 catalysts through enhancing V2O5–TiO2 interaction
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DOI：10.1016/j.jiec.2026.03.001.png)
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Abstract
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To develop efficient catalysts for chlorinated VOC combustion with enhanced chlorine resistance, V–TiO2 solid-solution catalysts were prepared via the sol–gel (SG) method and evaluated for chlorobenzene oxidation. In contrast to those synthesized by hydrothermal (HT) and impregnation (IM) methods, the SG-derived V–TiO2 formed a solid solution with abundant V–O–Ti bonds and V2O5–TiO2 interfaces. The TiO2 acts as an electron donor to V5+, promoting oxygen vacancy formation, which facilitates oxygen adsorption and activation. As the amount of incorporated vanadium increases, the activity of the V–TiO2 catalyst exhibits a volcanic pattern, indicating that constructing an appropriate amount of V2O5–TiO2 interface is the key to improving the low-temperature activity of the V–TiO2 catalyst. The SG-prepared V2O5/TiO2 achieved 90% chlorobenzene conversion at 250 °C (GHSV = 22,500 h−1, C = 1000 ppm), which is significantly lower than previously reported V2O5/TiO2 catalysts. There were only a few kinds of byproducts and no chloride organic byproducts were generated. The catalyst also exhibited excellent stability and water resistance. This work offers an effective strategy for designing stable catalysts for chlorinated VOC combustion.
Keywords:
V–TiO2 catalyst
chlorobenzene oxidation
V2O5–TiO2 interface
oxygen vacancy
chlorine resistance
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