LaCo1-xCuxO3纳米晶对染料酸性黑10B的光催化降解研究

采用EDTA络合溶胶-凝胶法在较低的温度下合成了LaCo1-xCuxO3复合氧化物纳米晶,通过XRD和SEM等手段对LaCo1-xCuxO3进行了表征.结果表明:在600℃焙烧即可得到钙钛矿型LaCo1-xCuxO3纳米晶,700℃焙烧所得颗粒基本呈球形,粒径为50 nm左右.采用IR和UV-Vis技术研究了该系列纳米晶对染料酸性黑10B的光催化降解活性,结果表明:掺杂量、焙烧温度、催化剂用量、光照时间等因素对脱色率均有一定的影响,在适宜的实验条件下,可使酸性黑10B的脱色率接近100%.

Study on the Photocatalytic Degradation of Dye Acidic Black 10B over LaCo1- xCuxO3 Nanocrystalline

A series of Cu-doped compounds LaCo_(1-x)Cu_xO_3 nanocrystallines were synthesized by EDTA complexing sol-gel method at relatively lower temperature.LaCo_(1-x)Cu_xO_3 nanocrystallines were characterized by XRD and SEM.The results show that the nanocrystalline of perovskite type LaCo_(1-x)Cu_xO_3 can be formed at 600 ℃.The particles of the nanocrystalline obtained at 700 ℃,are spherical and dispersive with the average size about 50 nm in diameter.The photocatalytic degradation activity of LaCo_(1-x)Cu_xO_3 nanocrystalline for the dye Acidic Black 10B was studied by IR and UV-Vis spectroscopies.The results show that the doped mol ratio of Cu~(2+),calcination temperature,the irradiation time of sun light,and the amount of the photocatalyst have some effects on the efficiency of decolorization.The efficiency of decolorization can reach to about 100% under the proporiety conditions.Therefore,LaCo_(1-x)Cu_xO_3 possesses photocatalytic activity,and shows promising in dye wastewater treatment.