熔盐中熟化处理提高BiFeO_3的可见光催化活性  

Enhancing the Visible-light Photocatalytic Activity of BiFeO_3 by Heating in Molten Salt

作　　者：孙尚梅[1] 庞广生[1] 李春光[1] 黄玉亮[1] 冯守华[1] 

机构地区：[1]吉林大学无机合成与制备化学国家重点实验室

出　　处：《高等学校化学学报》2007年第10期1830-1832,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20671039;20121103)资助.

摘　　要：The visible-light photocatalytic activity of BiFeO3 can be enhanced by treating in LiNO3 molten salt. BiFeO3 is prepared by pyrolysis of tartaric acid complex. The as-prepared BiFeO3 is mixed with LiNO3 salt by ball milling for 4 h with the molar ratio 12∶1 of LiNO3 to BiFeO3. The mixture was heated at 270 ℃ for 12 h, and LiNO3 was removed from the product by washing with distilled water. The visible light photocatalytic activity is evaluated by measuring the decoloratation of Congo red aqueous solution. After heating in LiNO3 molten salt, the decoloratation of Congo red aqueous solutions increased significantly from 31.6% to 95.4%. The enhancement of the photocatalytic activity is attributed to surface modification of BiFeO3 by treating in LiNO3 molten Salt.The visible-light photocatalytic activity of BiFeO3 can be enhanced by treating in LiNO3 molten salt. BiFeO3 is prepared by pyrolysis of tartaric acid complex. The as-prepared BiFeO3 is mixed with LiNO3 salt by ball milling for 4 h with the molar ratio 12：1 of LiNO3 to BiFeO3. The mixture was heated at 270 ℃ for 12 h, and LiNO3 was removed from the product by washing with distilled water. The visible light photocatalytic activity is evaluated by measuring the decoloratation of Congo red aqueous solution. After heating in LiNO3 molten salt, the decoloratation of Congo red aqueous solutions increased significantly from 31.6% to 95.4%. The enhancement of the photocatalytic activity is attributed to surface modification of BiFeO3 by treating in LiNO3 molten Salt.

关 键 词：钙钛矿 融盐法 光催化 

分 类 号：O611.4[理学—无机化学] O643.36[理学—化学]