A facile route to porous beta-gallium oxide nanowires-reduced graphene oxide hybrids with enhanced photocatalytic efficiency

摘要

A facile route was developed to fabricate porous beta-gallium oxide nanowires (beta-Ga2O3 NWs)-reduced graphene oxide (rGO) hybrids using beta-Ga2O3 NWs and graphene oxide (GO) as raw materials. The characterization results indicate that supercritical water can act as an efficient reductant to situ-reduce GO into rGO, and porous beta-Ga2O3 NWs can further attach on the surface of as-reduced rGO through a strong coupling forces between the beta-Ga2O3 NWs and rGO. The photocatalytic performance of the hybrids can be obviously improved (about 74%) for the decomposition of methylene blue (MB) solution after coupling with 1 wt% rGO compared with the pure beta-Ga2O3 NWs. The enhanced photocatalytic activity can be attributed to the synergistic effect of extended optical absorption band, the enrichment of MB molecular on the rGO and the valid inhibition of recombination of photo-generated electron-hole pairs induced by the strong coupling interaction between rGO nanosheets and porous beta-Ga2O3 NWs. (C) 2014 Elsevier B.V. All rights reserved.