Tailored Synthesis of Ga2O3 Nanofibers Towards Enhanced Photocatalytic Hydrogen Evolution

Ga 2 O 3 have attracted considerable attention in the field of photocatalysis. However, the preparation of 1D nanostructured Ga 2 O 3 photocatalyst with high purity and controllable structures is still in challenge. Herein, we report the synthesis of Ga 2 O 3 nanofibers with controllable structures by using electronspinning method and annealing treatment. The SEM, TEM, XRD and XPS results revealed that the produced Ga 2 O 3 photocatalysts have three different morphologies, including nanofibers, nanofibers/nanobelts and nanobelts, which was obtained by tailoring the raw materials and electronspinning parameters. The photocatalytic hydrogen evolution results show that the Ga 2 O 3 nanofibers display the highest hydrogen evolution rate among the three samples. The excellent photocatalytic performance of Ga 2 O 3 nanofibers photocatalyst could be resulted from its larger BET specific surface area and pore volume, which can provide more active sites and shorten the charge transfer distance. Graphical Abstract We report the controlled preparation of Ga2O3 nanofibers forphotocatalytic hydrogen evolution.