Fe3O4/carbon quantum dots hybrid nanoflowers for highly active and recyclable visible-light driven photocatalyst

Water dispersible Fe3O4@carbon quantum dots (CQDs) hybrid nanoflowers show highly efficient photocatalytic activities because of their strong absorption in the visible light range and upconversion photoluminescence. The magnetic Fe3O4 nanocrystals not only allow efficient magnetic separation and recycling of the photocatalyst, but also promote the photocatalytic activities of the CQDs.