不同形貌Bi4Ti3O12粒子的可控合成及光催化性能

引用本文: 林雪, 关庆丰, 刘婷婷, 张瑶, 邹春杰. 不同形貌Bi₄Ti₃O₁₂粒子的可控合成及光催化性能[J]. 物理化学学报, 2013, 29(02): 411-417. doi: 10.3866/PKU.WHXB201211211 shu

Citation: LIN Xue, GUAN Qing-Feng, LIU Ting-Ting, ZHANG Yao, ZOU Chun-Jie. Controllable Synthesis and Photocatalytic Activity of Bi₄Ti₃O₁₂ Particles with Different Morphologies[J]. Acta Physico-Chimica Sinica, 2013, 29(02): 411-417. doi: 10.3866/PKU.WHXB201211211 shu

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,

基金项目:
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

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:

English

Controllable Synthesis and Photocatalytic Activity of Bi₄Ti₃O₁₂ Particles with Different Morphologies

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 Date: 14 September 2012
Available Online: 14 January 2013
Fund Project:
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

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:

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沈阳化工大学材料科学与工程学院沈阳 110142

不同形貌Bi₄Ti₃O₁₂粒子的可控合成及光催化性能

English

Controllable Synthesis and Photocatalytic Activity of Bi₄Ti₃O₁₂ Particles with Different Morphologies

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