title: A visible-light-driven composite photocatalyst of TiO2 nanotube arrays and graphene quantum dots.
abstract: TiO2 nanotube arrays are well-known efficient UV-driven photocatalysts. The incorporation of graphene quantum dots could extend the photo-response of the nanotubes to the visible-light range. Graphene quantum dot-sensitized TiO2 nanotube arrays were synthesized by covalently coupling these two materials. The product was characterized by Fourier-transform infrared spectrometry (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and UV-vis absorption spectroscopy. The product exhibited high photocatalytic performance in the photodegradation of methylene blue and enhanced photocurrent under visible light irradiation.
authors.affiliation: Department of Chemistry and Shenzhen Research Institute, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
authors.forename: Donald K L
authors.initials: DK
authors.lastname: Chan
authors.affiliation: Department of Chemistry and Shenzhen Research Institute, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
authors.forename: Po Ling
authors.initials: PL
authors.lastname: Cheung
authors.affiliation: Department of Chemistry and Shenzhen Research Institute, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
authors.forename: Jimmy C
authors.initials: JC
authors.lastname: Yu
keywords: TiO2 nanotube arrays; anodic oxidation; graphene quantum dots; photocatalyst; photodegradation