▎ 摘　　要

Black TiO2-graphene oxide (GO) nanocomposites are synthesized via the pulsed laser ablating TiO2 powders and GO in deionized water. The simple process enables the preparation of black TiO2 nanoparticles and anchors them onto the GO sheet in one step. The TiO2-GO nanocomposites exhibit greatly enhancement for photocatalytic degradation of Rhodamine B (RB) dye in comparison with the pristine and the ablated black TiO2. The heterojunction structure plays an important role in efficient charge separation, which reduces the recombination of photogenerated electrons and holes. The unique two-dimensional structure of GO enables the composite to have a large specific surface area, and prevents the agglomeration of TiO2 nanoparticles, which are beneficial to the photocatalytic performance of the composite.