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Cu_2O nanocrystals were synthesized by irradiating an aqueous solution of CuSO_4·5H_2O(1.25g),polyvinyl alcohol(PVA,0.8 g),and isopropanol(3.1 mL).The products were characterized by powder XRD,TEM and SEM. Methyl orange degradation under visible light using the Cu_2O nanocrystals as catalyst was studied by UV-Vis absorption method.The results show that the products are nanocrystals of pure Cu_2O.Morphology and size of the nanoparticles are affected by the irradiation dose and pH value of the initial solution.Octahedral Cu_2O nanocrystals of 116 nm in size can be obtained at the initial pH of 8.0 and 280-kGy irradiation.The nanocrystals have excellent catalytic activity for photodegradation of the methyl orange solution bubbled at the air-flow rate of 750 mL·min~(-1),due to the large {111} facets of octahedral Cu_2O particles.
Cu_2O nanocrystals were synthesized by irradiating an aqueous solution of CuSO_4 · 5H_2O (1.25g), polyvinyl alcohol (PVA, 0.8g), and isopropanol (3.1mL). The products were characterized by powder XRD, TEM and SEM. visible light using the Cu_2O nanocrystals as catalyst was studied by UV-Vis absorption method. The results show that the products are nanocrystals of pure Cu_2O.Morphology and size of the nanoparticles are affected by the irradiation dose and pH value of the initial solution. Octahedral Cu 2 O nanocrystals of 116 nm in size can be obtained at the initial pH of 8.0 and 280-kGy irradiation. The nanocrystals have excellent catalytic activity for photodegradation of the methyl orange solution bubbled at the air-flow rate of 750 mL · min ~ (- 1), due to the large {111} facets of octahedral Cu_2O particles.