Abstract
Carbon quantum dots/titanium dioxide (CQDs/TiO2) nanocomposites were synthesized with TEMPO oxidized cellulose as carbon source via a facile method. In this eco-friendly system, the photocatalytic activity of CQDs/TiO2 were evaluated through photo-degradation of methylene blue (MB) under visible light. The results show that CQDs/TiO2 composites possess high photocatalytic degradation efficiency up to 92%. The enhanced degradation efficiency of MB was probably attributed to that the photoelectrical properties of CQDs can lead to effective separation of photo-generated electrons-holes pairs. Moreover, the TEMPO oxidized cellulose has abundant amino groups, which can significantly improve the photophysical properties of CQDs.
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