As a green and cheap oxidant, O2 can be used to replace traditional KMnO4 or tert-butyl hydroperoxide, which helps reduce reaction costs and reduce pollutant emissions . To promote the oxidation of benzyl alcohol, a series of nanoparticle catalysts have been prepared, such as Au, Ru, Pd, and other nanoparticles . Among them, Pd-based catalysts have a strong ability to activate oxygen and can generate aldehydes with high selectivity, so they are widely used . The catalytic activity of precious metal nanoparticle catalysts is greatly affected by size and valence . Therefore, to control the reaction selectivity and improve the catalytic ability of the catalyst, people try to dope the catalyst with other metals . Au/Pd-TiO2 catalysts can efficiently oxidize primary alcohols to produce aldehydes under solvent-free conditions, in which Au doping influences the structure and electrons of Pd nanoparticles . While the precious metal catalyst is difficult to use on a large scale due to its high cost. Therefore, the development of an environmentally friendly and cheap benzyl alcohol oxidation method is of great significance for the industrial preparation of benzaldehyde and benzoic acid.