A visible-light-driven composite photocatalyst of TiO2 nanotube arrays and graphene quantum dots

作者：Chan Donald K L; Cheung Po Ling; Yu Jimmy C^*

来源：Beilstein Journal of Nanotechnology, 2014, 5: 689-695.

DOI：10.3762/bjnano.5.81

• anodic oxidation
• graphene quantum dots
• photocatalyst
• photodegradation
• TiO2 nanotube arrays

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.

• 出版日期2014-5-22
• 单位香港中文大学; 香港中文大学（深圳）