物理化学学报 >> 2013, Vol. 29 >> Issue (02): 411-417.doi: 10.3866/PKU.WHXB201211211

催化和表面科学 上一篇    下一篇

不同形貌Bi4Ti3O12粒子的可控合成及光催化性能

林雪1, 关庆丰2, 刘婷婷1, 张瑶1, 邹春杰1   

  1. 1 吉林师范大学化学学院, 环境友好材料制备与应用教育部重点实验室, 吉林 四平 136000;
    2 江苏大学材料科学与工程学院, 江苏 镇江 212013
  • 收稿日期:2012-09-14 修回日期:2012-11-15 发布日期:2013-01-14
  • 通讯作者: 林雪 E-mail:jlsdlinxue@126.com
  • 基金资助:

    环境友好材料制备与应用教育部重点实验室项目和吉林师范大学博士科研启动项目资助

Controllable Synthesis and Photocatalytic Activity of Bi4Ti3O12 Particles with Different Morphologies

LIN Xue1, GUAN Qing-Feng2, LIU Ting-Ting1, ZHANG Yao1, ZOU Chun-Jie1   

  1. 1 College of Chemistry, Key Laboratory of Preparation and Application Environmentally Friendly Materials of the Ministry of Education, Jilin Normal University, Siping 136000, Jilin Province, P. R. China;
    2 School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Province, P. R. China
  • Received:2012-09-14 Revised:2012-11-15 Published:2013-01-14
  • Supported by:

    The project was supported by the Key Laboratory of Preparation and Application of Environmentally Friendly Materials of the Ministry of Education of China and Doctoral Scientific Research Project of Jilin Normal University, China.

摘要:

研究了用一步水热法制备的不同形貌的钛酸铋(Bi4Ti3O12, BIT)粒子的光学和可见光催化性能, 并对其晶体结构和微观结构用X射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、透射电子显微镜(TEM)和高分辨透射电子显微镜(HRTEM)等手段进行了表征. XRD结果表明, 所制备的BIT 样品为层状钙钛矿结构. FESEM结果表明, 通过控制水热过程的反应参数可以得到不同形貌的纳米粒子. 紫外-可见漫反射光谱(UV-Vis DRS)表明BIT 样品的带隙能约为2.88-2.93 eV. 利用可见光(λ>420 nm)照射下的甲基橙(MO)降解实验评价了BIT 样品的光催化性能. 结果表明, BIT 的光催化活性比掺氮TiO2 (N-TiO2)高得多. 研究了形貌对BIT 光催化性能的影响. 所制备的BIT纳米带光催化效率最高, 经可见光照射360 min, 甲基橙溶液的降解率可达到95.0%.

关键词: 钛酸铋, 纳米球, 纳米片, 纳米带, 可控合成, 光催化降解

Abstract:

Bismuth titanate (Bi4Ti3O12, BIT) particles with different morphologies were synthesized by a one-step hydrothermal process and their optical and photocatalytic properties were investigated. The crystal structure and microstructures were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). XRD patterns demonstrate that the as-prepared BIT samples have layered perovskite structure. FESEM shows that BIT crystals can be fabricated in different morphologies by simply manipulating the reaction parameters of the hydrothermal process. The UV-visible diffuse reflectance spectra (UV-Vis DRS) reveal that the band gaps of the BIT photocatalysts are about 2.88-2.93 eV. The as-prepared BIT photocatalysts exhibit higher photocatalytic activities toward the degradation of methyl orange (MO) under visible light irradiation (λ>420 nm) when compared with traditional N-doped TiO2 (N-TiO2). The influence of morphology on the photocatalytic properties of BIT was also studied. BIT nanobelt structures displayed the highest photocatalytic activity. Up to 95.0% MO was decolorized after visible light irradiation for 360 min.

Key words: Bi4Ti3O12, Nanosphere, Nanoplate, Nanobelt, Controllable synthesis, Photocatalytic degradation

MSC2000: 

  • O643