▎ 摘　　要

Pd-Pt/graphene-TiO2 nanocomposites were synthesized via a facile ultrasonic and hydrothermal method. For the functionalization of graphene, large area graphene obtained by chemical vapor deposition method was oxidized by 3-chloroperoxybenzoic acid. The functionalized graphene oxide was decorated with TiO2. And then, Pt and Pd nanoparticles were dispersed on graphene surface, simultaneously. The characterizations of as-prepared samples were studied by X-ray diffraction (XRD), transmission electron microscope (TEM), Raman, specific surface area (BET) and with energy dispersive X-ray (EDX). The photocatalytic activity of the Pd-Pt/graphene-TiO2 nanocomposite catalyst was evaluated by H-2 evolution under UV light. Pd-Pt/graphene-TiO2 (Pd-Pt/G-TiO2) exhibited higher photocatalytic activities than control experimental group samples (TiO2, G-TiO2, Pd/G-TiO2 and Pt/G-TiO2) under UV light irradiation.