Abstract
Photocatalytic activity for hydrogen evolution from water using methanol as hole scavenger was comparatively investigated over mesoporous TiO 2 photocatalysts with various contents of Cu, Pd, and Au cocatalyst loadings prepared by single-step sol–gel (SSSG) process with surfactant template. The photocatalysts were analytically characterized by X-ray diffraction (XRD), N 2 adsorption–desorption, Brunauer–Emmett–Teller (BET) surface area, Barrett–Joyner–Halenda (BJH) pore size distribution, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) analyses. The comparison of optimum loading contents of the cocatalysts was chiefly studied on the mesoporous TiO 2. Among photocatalysts, 2 wt% Au supported on mesoporous TiO 2 exhibited the highest photocatalytic H 2 evolution activity.
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