▎ 摘　　要

Herein, we have presented a facile route for the in situ preparation of titania-graphene nanocomposites having excellent photocatalytic activity. Titania sol is incorporated into graphene oxide sheets, and the resultant mixture is solvothermally treated to attain titania-reduced graphene oxide composites without the use of any additional reducing agents. The well alignment of the anatase titania nanoparticles over individual graphene layers was confirmed using various characterization techniques, such as X-ray diffraction, atomic force microscopy, field emission scanning electron microscopy and transmission electron microscopy. The photocatalysts showed complete degradation of methyl orange within short duration of UV irradiation. The best catalyst, with TiO2 nanoparticles dispersed over 2 wt% graphene sheets, showed remarkable reusability where the activity remained unaffected till four repeated cycles. The facile method of preparation, graphene oxide reduction without the aid of any reducing agent, excellent photodegradation of methyl orange within short duration and reusability of the catalyst are the foremost attractions of present photocatalysts. Facile fabrication of titania-graphene nanocomposites, for the photocatalytic degradation of methyl orange dye, is achieved under mild conditions.