To test the photocatalytic oxidation of benzyl alcohol, various Ni@C/TiO2 have been used in the oxidation of benzyl alcohol, and results are shown in Table . It can be seen that the Ni@C/TiO2 shows the good performance in producing benzaldehyde with a selectivity up to 100%. The conversion over the commercially available TiO2 supported Ni@C gradually decreases with the increase of the TiO2 particle size.