东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (1): 138-142.DOI: 10.12068/j.issn.1005-3026.2018.01.028

• 资源与土木工程 • 上一篇    下一篇

基于碳量子点的TiO2改性及降解污染物性能

姜婷婷1, 石勇2, 柯军2,3, 许开立1   

  1. (1. 东北大学 资源与土木工程学院, 辽宁 沈阳110819; 2. 大连理工大学 环境学院, 辽宁 大连116024; 3. 武汉工程大学 化学与环境工程学院, 湖北 武汉430074)
  • 收稿日期:2016-07-13 修回日期:2016-07-13 出版日期:2018-01-15 发布日期:2018-01-31
  • 通讯作者: 姜婷婷
  • 作者简介:姜婷婷(1991-),女,辽宁沈阳人,东北大学博士研究生; 许开立(1965-),男,山东郓城人,东北大学教授,博士生导师.
  • 基金资助:
    国家重点基础研究发展计划项目(2017YFC0805101).

TiO2 Photocatalyst Modified by Carbon Quantum Dots and Its Activity in Pollutants Degradation

JIANG Ting-ting1, SHI Yong2, KE Jun2,3, XU Kai-li1   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. School of Environment, Dalian University of Technology, Dalian 116024, China; 3. School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, China.
  • Received:2016-07-13 Revised:2016-07-13 Online:2018-01-15 Published:2018-01-31
  • Contact: SHI Yong
  • About author:-
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摘要: 采用溶胶-凝胶法合成掺入碳量子点(CQDs)的TiO2纳米复合光催化剂,通过荧光光谱、紫外-可见吸收光谱、X射线衍射、扫描电镜等进行表征,并在可见光下降解亚甲基蓝(MB)染料溶液以评价其光催化性能.研究表明,CQDs具备上转换荧光特性,掺入CQDs的TiO2样品可见光响应明显提升.水热法180℃下反应6h制备的CQDs,其溶液加入量为10mL时TiO2/CQDs样品光催化活性最高,115min后MB的降解率达80%.TiO2/CQDs样品主要以锐钛矿相存在,颗粒呈球形,比表面积高达200m3·g-1.

关键词: TiO2, 碳量子点, 溶胶-凝胶法, 光催化降解, 亚甲基蓝

Abstract: The nanocomposite photocatalyst TiO2 modified by carbon quantum dots(CQDs) was first prepared by sol-gel method and represented by fluorescence spectra, UV-vis absorption spectra, X-ray diffraction and scanning electron microscope. Then, the photocatalytic activity was investigated by degrading methylene blue(MB) in visible light. Results show that CQDs exhibits an upconversion fluorescence, meanwhile, the visible-light response of TiO2 modified by CQDs was significantly improved. For the TiO2/CQDs obtained by hydrothermal method under 180 ℃ lasting for 6h, when the doping amount is 10 mL, the photocatalytic activity is the highest. The degradation rate of MB comes to 80% after 115 min. The TiO2/CQDs is mainly composed by anatase, whose particles take on a spherical shape with a specific surface area up to 200 m3·g-1.

Key words: TiO2, carbon quantum dots(CQDs), sol-gel method, photocatalytic degradation, methylene blue

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