▎ 摘　　要

Development of efficient materials for solar energy conversion is an urgent need for water treatment and photovoltaic applications. Herein we synthesized WO3/graphene composite by a facile microwave irradiation method. The as prepared WO3/graphene composite is characterized by various instrumentation techniques such as XRD, SEM, UV-Vis, PL, nitrogen adsorption/desorption. Characterization data demonstrated that graphene decorated WO3 nanospheres generates nanostructure with reduced band gap energy (2.77 eV), rich porosity (28.89 nm) and substantial specific surface area (86.9 m(2) g(-1)). The photo catalytic performance of as synthesized composite was examined in the degradation of crystal violet (CV) under irradiation of sun light. Dye Sensitized Solar Cell (DSSC) was designed by using the prepared composite as photo anode and its solar energy conversion efficiency was evaluated. In all investigated cases, WO3/graphene hybrid composite established a superior compatibility (93%) to degrade the CV as well as superior anodic performance (PCE 11.19%) in DSSC's compared to their counterpart. The enhanced photon absorption, energy band restructuring and synergic effect are the main causes for the fabulous performance of photo catalytic and photo anodic properties. Thus, the WO3/graphene composite has the potential to be an efficient adoptable material for photo catalytic and DSSC applications.