Efficient visible-light-driven photocatalytic degradation of nitrophenol by using graphene-encapsulated TiO2 nanowires

•A new multi-component photocatalyst with hierarchical nanostructures is developed.•Graphene, TiO2 nanowires and Pd nanoparticles are integrated.•Enhanced light harvesting efficiency in the visible-light region was witnessed.•Kinetics of the photocatalytic reduction of 4-nitrophenol were studied.•Ph...

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