Abstract
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.
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