高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (10): 1977.doi: 10.7503/cjcu20150287

• 物理化学 • 上一篇    下一篇

物理混合法制备分级混晶TiO2微纳米材料及其光催化性能

张晓1,2, 解英娟2, 马佩军2, 吴志娇2, 赵谡玲1, 朴玲钰2()   

  1. 1. 北京交通大学光电子技术研究所, 发光与光信息技术教育部重点实验室, 北京 100044
    2. 国家纳米科学中心, 中国科学院纳米标准与检测重点实验室, 北京 100190
  • 收稿日期:2015-04-13 出版日期:2015-10-10 发布日期:2015-09-18
  • 作者简介:联系人简介: 赵谡玲, 女, 博士, 教授, 主要从事纳米材料和有机光电子器件研究. E-mail:slzhao@bjtu.edu.cn;朴玲钰, 女, 博士, 研究员, 主要从事光催化研究. E-mail:piaoly@nanoctr.cn
  • 基金资助:
    国家重点基础研究发展计划项目(批准号: 2011CB932802)、 国家科技支撑计划项目(批准号: 2011BAK15B05)、 科技部基础性工作专项(批准号: 2011FY130104)和中国科学院战略性先导科技专项-A类(批准号: XDA09040400)资助

Photocatalytic Performances for Mixed-phase Hierarchical Structure TiO2 Prepared by Physical Mixing

ZHANG Xiao1,2, XIE Yingjuan2, MA Peijun2, WU Zhijiao2, ZHAO Suling1,*, PIAO Lingyu2,*()   

  1. 1. Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044, China
    2. CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing 100190, China
  • Received:2015-04-13 Online:2015-10-10 Published:2015-09-18
  • Contact: ZHAO Suling,PIAO Lingyu E-mail:slzhao@bjtu.edu.cn

摘要:

通过物理混合法可控合成了分级混晶TiO2微纳米材料, 采用扫描电子显微镜(SEM)、 透射电子显微镜(TEM)、 X射线衍射仪(XRD)、 X射线光电子能谱仪(XPS)和固体紫外-可见分光光度计(UV-Vis)等对该微纳米材料进行了表征, 并评价了不同混晶比材料的光催化性能. 结果表明, 所得材料是由均匀负载金红石纳米颗粒的锐钛矿纳米片组装的三维分级结构. 其具有很高的光催化活性, 分级结构和混晶异相结的同时引入是提高材料光催化活性的关键.

关键词: 二氧化钛, 混晶分级结构, 异相结, 光催化

Abstract:

Mixed-phase hierarchical structure titania(MH-TiO2) with different rutile contents were synthesized via physically mixing hierarchical flower-like anatase TiO2 and rutile TiO2 nanoparticles. The morphology, phase-structure and properties of the samples were studied via scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS) and UV-Vis diffused reflectance spectrometry(UV-Vis DRS). The photocatalytic activity of MH-TiO2 for degradation of methylene blue under ultraviolet light irradiation was investigated. The results indicate that the hierarchical structure can enlarge specific surface area thus ensuring the effective adsorption of reactant and improving the utilization of light. What’s more, heterojunction structure can increase the separation efficiency of the photogenerated electrons and holes and improve the photocatalytic performances of the material.

Key words: TiO2, Mixed-phase hierarchical structure, Heterojunction, Photocatalysis

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