Abstract
Herein, graphitic carbon nitride (g-C3N4) was firstly introduced to optimize the NH3-SCR activity of Ce20W10Ti100Oz by adding excess melamine (Mel) into its mixed solution after the hydrothermal co-precipitation. The results indicate that both the modification of Mel and the doping of g-C3N4 contribute to improve the catalytic performance of NOx reduction over Ce20W10Ti100Oz when the mass ratios of Mel and Ti(SO4)2 were kept at 4:2 and 8:2, respectively. Furthermore, the results of XPS demonstrate that the doped g-C3N4 could increase the concentration of adsorbed oxygen on the surface of Ce20W10Ti100Oz, and Ce20W10Ti100Oz–Mel4 presents higher proportion of adsorbed oxygen (44.4%) compared to Ce20W10Ti100Oz–Mel2. Therefore, there exists a synergistic effect between the doped g-C3N4 and the active components of Ce/W/Ti, which helps improve the NH3-SCR activity of Ce20W10Ti100Oz, although the presence of cerium-tungsten-titanium mixed oxide shows the catalytic effect on the thermal decomposition of the doped g-C3N4 in it.
Graphical abstract
Promotional effect of g-C3N4 doping on the NH3-SCR activity of cerium–tungsten–titanium composite oxide catalyst prepared by hydrothermal co-precipitation.
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All data generated or analyzed during this study are included in this published article [and its supplementary information files].
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This work was supported by the National Science Foundation of China (No. 51406118).
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Xiong, Zb., Guo, Fc., Zhang, Jx. et al. Influence of g-C3N4 doping on the NH3-SCR activity of Cerium–tungsten–titanium mixed oxide catalyst. Journal of Materials Research 37, 835–848 (2022). https://doi.org/10.1557/s43578-022-00489-2
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DOI: https://doi.org/10.1557/s43578-022-00489-2