摘要
采用柠檬酸法合成了钙钛矿型复合氧化物催化剂ＬａＦｅＯ３ ， 并按不同比例进行掺杂，制备了ＬａＦｅ１ － ｘＣｕｘＯ３（ｘ ＝ ０－０１～０－０９）系列样品． 以高压荧光汞灯为光源，测定了该系列样品对酸性红３Ｂ等水溶性染料的光催化降解活性． 采用红外、紫外、光声光谱及正电子寿命谱等技术分析了催化剂的光催化性能及掺杂对活性的影响． 结果表明，掺杂后ＬａＦｅＯ３ 的光催化活性明显提高，这主要与Ｂ离子的ｄ 电子结构有关．
The LaFeO 3 and a series of Cu doped compounds LaFe 1- x Cu x O 3 were prepared by citrate method. Using a 450 W of luminous high pressure Hg lamp as irradiator, the photodestruction experiments of various water soluble dyes were carried out in the suspension systems of LaFe 1- x Cu x O 3 that act as photocatalysts. The photocatalytic activity of LaFeO 3 and its doped compounds was studied with IR, UV Vis and photoacoustic spectroscopies. The influence of doping on photocatalytic activity was also studied in terms of the positron annihilation spectroscopy. The results reveal that the photocatalytic activity of LaFe 1- x Cu x O 3 is higher than that of LaFeO 3. This basically depends on the d electron structure of atom B.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第6期623-627,共5页
基金
国家自然科学基金
关键词
钙钛矿
复合氧化物
染料
降解
光催化剂
镧
铁
perovskite type oxide, LaFe 1- x Cu x O 3, doping, water soluble dye, photocatalytic degradation, positron annihilation
