水热合成BiVO_4催化剂及其可见光催化活性  

Hydrothermal preparation of BiVO_4 nanoparticles and their photocatalytic properties under visible light

作　　者：安风霞[1] 陈建林[1] 齐凯[1] 张丽[1] 

机构地区：[1]污染控制与资源化国家重点实验室南京大学环境学院,江苏南京210093

出　　处：《工业催化》2010年第1期22-25,共4页Industrial Catalysis

摘　　要：以Bi(NO3)3.5H2O和NH4VO3为原料,用水热法合成新型的可见光催化剂BiVO4,以活性蓝M-2GE染料废水为目标污染物,通过XRD、TEM和UV-vis DRS等表征手段考察了水热合成时间、水热温度和前驱物pH对催化剂可见光活性和晶型的影响,结果表明,在160℃、pH=7.01和水热合成时间2 h条件下合成的催化剂光催化效果最好,光照210 min,对M-2GE的去除率达98%。其吸收边带为520 nm,能隙禁带宽约2.4 eV。BiVO4 photocatalysts for visible-light-driven pollutants degradation were prepared by hydrothermal method and effects of hydrothermal synthesis time, hydrothermal temperature and pH of the precursors on catalytic properties and structure of the BiVO4 photocatalyst were investigated by degradation of aqueous M-2GE at room temperature under visible light irradiation and characterized by XRD, TEM and UV-vis DRS spectroscopy. BiVO4 synthesized under 160 ℃, precursor pH of 7. 01 and hydrothermal synthesis time for 2 h, with absorption edge of 520 nm and energy band gap of 2.4 eV, exhibited the highest photocatalytie activity, with M-2GE removal of 98% after irradiation for 210min.

关 键 词：催化化学 水热合成 可见光 BIVO4 催化剂 染料废水 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]