This research developed innovative photothermal catalysts with exposed (0 0 1) facets, which can be used in SCR for better redox effectiveness and thermal stability. By adding different quantities of HF, we prepared the photothermal catalysts with different percentages of face {0 0 1} and further obtained the optimal temperature for the catalytic oxidation of Hg0. Secondly, the synergetic effects on the removal efficiency of Hg0 and NOx and their reaction mechanisms were explored for different NO and NH3 concentrations. The newly developed novel photothermal catalysts combined with UV/TiO2 could cause the redox reactions of Hg0 and NO in SCR. CeO2 doped TiO2{0 0 1} could form active chemisorbed oxygen (Oα) and lattice oxygen (Oβ), where Ce4+ reacted with e- to form Ce3+ and O2 existed on the surface of the catalysts reacted with e- to form O2−. Hg0 further reacted with h+ and O2− to form HgO which could be effectively absorbed by wet scrubbing. Additionally, 7%CeO2/TiO2{0 0 1} oxidized NO to NO2 by O2−, then reacted with NH3 to form NH4NO2, and finally reacted with NO to form N2 and H2O.