To study the crystal facets effects of TiO₂ on catalytic O₃/H₂O₂ for NO oxidation at low temperature, anatase TiO₂ nanocrystals with a high percentage of {101}, {010} and {001} facets were prepared by hydrothermal routes without fluorine. The percentages of the {101}, {010} and {001} facets in these three samples were 80%, 70% and 66%, respectively. The sequence of NO oxidation efficiency was determined as TiO₂(001) (92%) > TiO₂(101) (86%) > TiO₂(010) (71%) under the molar ratio of O₃/NO = 0.5 and H₂O₂/NO = 2.9. The crystal facets mechanism exhibited that TiO₂(010) sample had the strongest Lewis acid sites, but TiO₂(010) activated H₂O₂ to produce a stable Ti-OOH, which could not react with O₃ to generate more •O₂^– radicals. TiO₂(101) possessed a lower density of five-coordinated Ti atoms (Ti_5c) than TiO₂(010) and TiO₂(001), the cooperative effect between Ti_5c and H₂O₂ was the weakest. On the contrary, Ti-OOH on the surface of TiO₂(001) was more active for •O₂^– production, meanwhile, TiO₂(001) also exhibited the strongest NO adsorption properties. Thus, TiO₂(001) had excellent NO oxidation efficiency.

_{为了研究TiO 2}晶面对低温催化O ₃ /H ₂ O ₂氧化NO的影响，采用水热法制备了具有高比例{101}、{010}和{001}晶面的锐钛矿型TiO ₂纳米晶。不含氟的路线。这三个样本中{101}、{010}和{001}面的百分比分别为80%、70%和66%。_{当O 3} /NO摩尔比=0.5时, NO氧化效率大小顺序为TiO ₂ (001)(92%)>TiO ₂ (101)(86%)>TiO ₂ (010)(71%)。 H ₂ O ₂/否 = 2.9。晶面机理表明TiO ₂ (010)样品具有最强的Lewis酸位，但TiO ₂ (010)活化H ₂ O ₂生成稳定的Ti-OOH，不能与O ₃反应生成更多•O ₂ ^–部首。TiO ₂ (101)的五配位Ti原子(Ti _5c )密度比TiO ₂ (010)和TiO _{2 (001)低，Ti 5c}与H ₂ O ₂的协同作用最弱。相反，TiO ₂ (001)表面的Ti-OOH对•O的活性更高_2-生产同时，TiO ₂ (001)也表现出最强的NO吸附性能^。因此，TiO ₂ (001)具有优异的NO氧化效率。