Abstract
Although TiO2-based nanostructures with unique chemical and physical properties exhibit great promise in water treatment and energy conversion/storage, there still exist some limitations. In order to further improve the photochemical properties, one-dimension (1D) TiO2 nanoarrays on the substrate are primarily combined with graphene by various preparation technologies. The composite coating has exhibited extraordinary photocatalytic abilities in the degradation of organic pollutants into less toxic compounds, antimicrobial activity and adsorption capacity in water treatment. Especially, it is easy to recycle after photocatalytic reaction. Additionally, TiO2 nanoarrays/graphene on the substrate (especially flexible substrate) could provide potential opportunities for flexible-device fabrication with excellent photovoltaic conversion efficiency and electrochemical performance in energy conversion/storage devices. As far as we know, the relevant reviews have rarely been reported. Here, we present a comprehensive review on the preparation of TiO2 nanoarrays or TiO2 nanoarrays/graphene, and their application and mechanism in water treatment and energy conversion/storage.
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