Effect of Nitrogen-Doped Carbon Dots (NCDs) on the Characteristics of NCD/MIL-53(Fe) Composite and Its Photocatalytic Performance for Methylene Blue Degradation under Visible Light

Metal-organic framework composites, which are combined from metal-organic and advanced carbon material, have drawn great attention in many fields of application such as environmental remediation catalysts. Within this paper, the carbon/MIL-53(Fe) composite was fabricated via an situ synthesis, N-containing dots (NCDs) were mixed with MOF precursors’ solutions under various ratios before going through solvothermal stage. It showed that introduction a certain amount NCDs would affect characteristic features improve photocatalytic performance final products. The optimal doping content NCD/MIL-53(Fe) determined. SEM images M-140 appeared hexagonal bipyramid-shaped crystals average size 700 nm. Compared pristine MIL-53(Fe), more visibly light-responsive, its calculated band gap energy approximately 2.3 eV. In addition, catalyst also displayed excellent activity for Methylene Blue degradation pH range 5 to 7. Under conditions, MB achieved within 60 minutes removal rate nearly 100% after cycles. mechanism obtained discussed.