fig4
Figure 4. (A) Catalytic performances of g-C3N4 carriers and supported Au catalysts for photooxidation of HMF to DFF; (B) Time-course investigation of CN(I) and Au/CN(I) during photooxidation of HMF. Reaction conditions: HMF, 0.1 mmol; catalyst, 30 mg; deionized water, 100 mL; O2 flow, 10 mL min-1; Xe lamp, l = 350-780 nm; temperature, 35 °C; time, 2 h for (A). HMF: 5-hydroxymethylfurfural; DFF: 2,5-diformylfuran.
