| Fe2BiTaO7纳米催化剂的组织结构及光催化性能 |
| Structural and Photocatalytic Properties of Fe2BiTaO7 Nanocatalyst |
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| 摘要: 用固相反应合成法合成了光催化剂Fe2BiTaO7,通过XRD、SEM、TEM、紫外-可见漫反射等表征方法对其组织结构及光催化性能进行了研究.结果表明Fe2BiTaO7为立方晶系烧绿石结构,空间群为Fd3m,禁带宽度为1.72eV.通过比较Fe2BiTaO7、P25 TiO2、掺氮TiO2和Bi2InTaO7的可见光光催化降解罗丹明B,发现Fe2BiTaO7降解效果及催化活性均高于其它催化剂,并且Fe2BiTaO7降解罗丹明B效率是掺氮二氧化钛的1.5倍.Fe2BiTaO7降解罗丹明B的曲线符合一级动力学,一级动力学常数为0.02293min-1.研究了罗丹明B可能的降解路径和Fe2BiTaO7在可见光下降解苯酚的效果.Fe2BiTaO7(可见光)光催化剂系统适用于纺织工业废水处理. |
| 关键词: 催化作用 Fe2BiTaO7 光学性能 可见光 光催化降解 罗丹明B |
| 基金项目: 国家自然科学基金(No.21277067);中以科学与战略研究开发专项资金(No.5)资助项目 |
| Abstract: Fe2BiTaO7 powder photocatalyst was synthesized by a solid state reaction method. The structural and photocatalytic properties of Fe2BiTaO7 were characterized by XRD, SEM, TEMand UV-Vis diffuse reflectance spectroscopy. The results show that Fe2BiTaO7 crystallizes with the pyrochlore-type structure, cubic crystal system and space group Fd3m. The estimated band gap of Fe2BiTaO7 is 1.72 eV. The photocatalytic degradation of rhodamine Bover Fe2BiTaO7, P25 TiO2, N-doped TiO2 and Bi2InTaO7 was investigated under visible light irradiation. The photocatalytic efficiency with Fe2BiTaO7 catalyst is 1.5 times of N-doped TiO2 catalyst after 140 minutes under visible light irradiation. Fe2BiTaO7 has higher visible-light photocatalytic performance and shows much better activity than that of other photocatalysts. The photocatalytic degradation of rhodamine Bfollows the first-order reaction kinetics, and the first-order rate constant is 0.02293 min-1 for Fe2BiTaO7. The possible photocatalytic degradation pathway of rhodamine Bunder visible light irradiation is suggested. In addition, the photocatalytic degradation of phenol over Fe2BiTaO7 catalyst was investigated under visible light irradiation. Fe2BiTaO7 (visible light) photocatalysis system is confirmed to be suitable for textile industry wastewater treatment. |
| Keywords: catalysis Fe2BiTaO7 optical properties visible light photocatalytic degradation rhodamine B |
| 投稿时间：2014-09-17 修订日期：2014-11-13 |
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| 栾景飞,胡文华,陈标杭,裴冬华.Fe2BiTaO7纳米催化剂的组织结构及光催化性能[J].无机化学学报,2015,31(2):385-398. |
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