▎ 摘 要
A hybrid nanomaterial of Co/Cu2O based on carbon nanotubes (CNTs) is proposed as a highly promising photocatalyst for solar hydrogen production. Cu2O nanoparticles are active catalysts for hydrogen evolution from copper acetate by polyol process, but Cu-0 nanoparticles are easily formed in this process, resulting in Cu associated Cu2O. To suppress the formation of metallic copper, metallic cobalt loaded CNT is used as a substitute for the non-loaded CNT for Cu2O formation. The metallic cobalt nanoparticles are not only effective in preventing the reduction of Cu-2+ to Cu-0, but they also enhance the efficiency of the CNT-substrated hybrid material preparation. Furthermore, graphene oxide (GO) is formed in the fabrication process of CNT/Co materials, and the GO is obtained from the exfoliated tube wall of CNT, which is evidenced by the uneven distribution of Co and Co/Cu2O on the GO flakes. The hybrid materials of CNT/Co/Cu2O and [CNT + GO]/Co/Cu2O are investigated as photocatalysts for water splitting. The results reveal that CNT/Co/Cu2O and [CNT + GO]/Co/Cu2O can be used to split water, thus enabling the economic production of hydrogen.