Photocatalytic Reduction of CO2 Over Sol-Gel Derived Copper-Doped Titania Catalysts

摘要: Different doping concentration of copper-doped titania was synthesized by sol-gel method, and the samples were characterized X-ray diffraction (XRD); Field emission scanning electron microscope (FSEM-EDX); Specific surface area Pore size analyzer (BET); Thermo gravimetric-differential thermal (TG-DTA) respectively. The photocatalytic reduction CO2 experiments carried out in a reactor. discharged into quartz reactor with catalyst suspended NaHCO3 solution, illuminated under UV irradiation at wavelength 253.7 nm for 10 h continuously. results confirmed that copper modified TiO2 samples, crystalline form exists as anatase; only on high CuO loading sample (>10%), peaks appears obviously; grain all derived CuO-TiO2 nearly 30 nm, particles consistent dispersed TiO2. can be reduced methanol presence solution over catalyst. 5% performed best catalytic effect, yield 27 mg (g-cata)−1 h. With increasing reaction time, promoted.