Catalytic oxidation of 2-methylnaphthalene to 2-methyl-1,4-naphthoquinone (vitamin K₃) is a significant pathway to produce vitamin groups K. High pollution and low-productivity of the traditional method require a greener catalyst and process. In this work, Al/Ti-SBA-15 with different n_Si/n_Al and n_Si/n_Ti ratios were hydrothermally prepared in mild acidic condition and tested in partial oxidation of 2-methylnaphthalene. Commercial zeolites NaY, β and ZSM-5 were applied to investigate the influence of mass transfer resistance and acidity on catalytic performance. Catalysts were characterized by XRD, N₂ adsorption-desorption, TEM, NH₃-TPD, FTIR and Py-FTIR. We have found that the 2-methylnaphthalene conversion and vitamin K₃ selectivity depend strongly on the mesoporous structure as well as Brönsted acid concentration and strength. Irregular micropores and strong acidity will accelerate the cleavage of C = C in aromatic rings, leading to the production of phthalic anhydride. DFT calculation reveals that incorporation of aluminum in SBA-15 can reduce the energy gap, facilitating the electron transfer. And as a consequence of the substitution of Al in tetrahedral positions in SBA-15, Al-SBA-15 (10) gives the best result with 72% yield to vitamin K₃. This catalyst markedly reduces the activation energy due to the modified activated center. Repeated experiments recommend that Al-SBA-15 is a steady and high-efficiency catalyst for the production of vitamin K₃.

2-甲基萘催化氧化为2-甲基-1,4-萘醌（维生素K ₃）是生产维生素K的重要途径。传统方法的高污染和低生产率要求绿色环保的催化剂和工艺。在这项工作中，在温和的酸性条件下水热制备具有不同n _Si / n _Al和n _Si / n _Ti比的Al / Ti-SBA-15，并测试了2-甲基萘的部分氧化。用商品沸石NaY，β和ZSM-5研究了传质阻力和酸度对催化性能的影响。用XRD，N ₂吸附-解吸，TEM，NH ₃ -TPD，FTIR和XRD对催化剂进行了表征。Py -FTIR。我们发现2-甲基萘的转化率和维生素K _3的选择性在很大程度上取决于介孔结构以及布朗斯台德酸的浓度和强度。不规则的微孔和强酸将加速C = C在芳环中的裂解，从而导致邻苯二甲酸酐的产生。DFT计算表明，在SBA-15中掺入铝可以减少能隙，从而促进电子转移。由于在SBA-15中四面体位置取代了Al，Al-SBA-15（10）可获得最佳结果，维生素K _3的收率为72％。由于修饰的活化中心，该催化剂显着降低了活化能。重复的实验建议Al-SBA-15是一种稳定高效的维生素K ₃产生催化剂。