Author:
Shi Qi,Long Hong-ming,Chun Tie-jun,Gao Zhi-fang
Abstract
Abstract
VOx/CeO2 catalysts with various nanostructure were synthesized by the hydrothermal method and used in catalytic combustion of chlorobenzene (CB) at a low temperature. XRD, BET, TEM, Raman, XPS, and H2-TPR were employed to reveal that catalysts VOx on CeO2 support had considerable activity for CB combustion. VOx/CeO2 catalysts prepared with ammonium to adjust pH value and added P123 as a surfactant, showed the highest CB conversion ratio of 60 % at 250 °C and 100 % at 400 °C. It showed that preparation method could infect the shape evolution and surface species during the synthesis. The new phase CeVO4 formed in VOx/CeO2 catalysts improved the catalysts efficiency by increasing oxygen vacancies.
Subject
General Chemical Engineering
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