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利用水热法制备了纳米铁酸镍,表征了其微观结构和光谱性能,并以罗丹明B溶液作为目标污染物,研究了铁酸镍催化剂的可见光催化性能。结果表明:所制备铁酸镍的微观形貌为由直径200-300 nm左右的类似球形小颗粒组成的大颗粒,平均粒径为95.60 nm,在紫外-可见光谱区均有较强的光吸收。光催化过程中催化剂的适宜用量为0.05 g,少量H2O2的加入有助于提高罗丹明B溶液的降解率。催化剂用量为0.05 g,加入0.4 mL 30%的H2O2,降解50 mL 20 mg/L罗丹明B溶液,模拟太阳光照射240 min后降解率能够达到99.2%。在实际太阳光照射下,240 min后罗丹明B溶液的降解率可以达到85.2%。
Nanometer ferric nickel ferrite was prepared by hydrothermal method. Its microstructure and spectral properties were characterized. Rhodamine B solution was used as the target pollutant to study the visible light photocatalytic activity of nickel ferrite catalyst. The results show that the micro-morphology of the prepared nickel ferrite is a kind of large spherical particles with similar spherical particles with a diameter of about 200-300 nm, the average particle size is 95.60 nm, and the strong absorption of light in the UV-visible region . The optimum amount of catalyst is 0.05 g in the photocatalytic process. The addition of a small amount of H2O2 helps to improve the degradation rate of Rhodamine B solution. When the amount of catalyst was 0.05 g, the degradation rate of rhodamine B 50 mL 20 mg / L rhizobium B solution was reduced by adding 0.4 mL 30% H2O2 to simulate the degradation rate of 99.2% after 240 min exposure to sunlight. Under actual sunlight, the degradation rate of Rhodamine B solution reached 85.2% after 240 min.