SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (12): 2628-2635.DOI: 10.1016/j.cjche.2018.02.017

• Energy, Resources and Environmental Technology • 上一篇    下一篇

Facile ultrasonic-assisted synthesis of micro-nanosheet structure Bi4Ti3O12/g-C3N4 composites with enhanced photocatalytic activity on organic pollutants

Huihui Gan1, Futao Yi1,2, Huining Zhang1, Yongxing Qian1, Huixia Jin1, Kefeng Zhang1   

  1. 1 School of Civil Engineering and Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China;
    2 College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
  • 收稿日期:2017-11-30 修回日期:2018-01-25 出版日期:2018-12-28 发布日期:2019-01-09
  • 通讯作者: Huihui Gan
  • 基金资助:

    Supported by the National Natural Science Foundation of China (51509220), the Natural Science Foundation of Zhejiang Province (LQ14E090003), Ningbo Science and Technology Plan Projects (2014C50007, 2014C51003) and Ningbo major social development projects (2017C510006).

Facile ultrasonic-assisted synthesis of micro-nanosheet structure Bi4Ti3O12/g-C3N4 composites with enhanced photocatalytic activity on organic pollutants

Huihui Gan1, Futao Yi1,2, Huining Zhang1, Yongxing Qian1, Huixia Jin1, Kefeng Zhang1   

  1. 1 School of Civil Engineering and Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China;
    2 College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
  • Received:2017-11-30 Revised:2018-01-25 Online:2018-12-28 Published:2019-01-09
  • Contact: Huihui Gan
  • Supported by:

    Supported by the National Natural Science Foundation of China (51509220), the Natural Science Foundation of Zhejiang Province (LQ14E090003), Ningbo Science and Technology Plan Projects (2014C50007, 2014C51003) and Ningbo major social development projects (2017C510006).

摘要: The Bi4Ti3O12/g-C3N4 composites with microsheet and nanosheet structure were prepared through facile ultrasonic-assisted method. The SEM and TEM results suggested that the nanosheets g-C3N4 were stacked on the surface of regular Bi4Ti3O12 sheets. Comparing with pure Bi4Ti3O12 and g-C3N4, the Bi4Ti3O12/g-C3N4 composites showed significant enhancement in photocatalytic efficiency for the degradation of RhB in solution. With the mass ratio of g-C3N4 increasing to 10 wt%, the Bi4Ti3O12/g-C3N4-10% presented the best photocatalytic activity. Its photocatalysis reaction constant was approximately 2 times higher than the single component Bi4Ti3O12 or g-C3N4. Meanwhile, good stability and durability for the Bi4Ti3O12/g-C3N4-10% were confirmed by the recycling experiment and FT-IR analysis. The possible mechanism for the improvements was the matched band positions and the effective separation of photo-excited electrons (e-) and holes (h+). Furthermore, based on the results of active species trapping, photo-generated holes (h+) and superoxide radical (·O2-) could be the main radicals in reaction.

关键词: Rhodamine B, Photocatalyst, Ultrasonic assisted synthesis, Bi4Ti3O12, g-C3N4

Abstract: The Bi4Ti3O12/g-C3N4 composites with microsheet and nanosheet structure were prepared through facile ultrasonic-assisted method. The SEM and TEM results suggested that the nanosheets g-C3N4 were stacked on the surface of regular Bi4Ti3O12 sheets. Comparing with pure Bi4Ti3O12 and g-C3N4, the Bi4Ti3O12/g-C3N4 composites showed significant enhancement in photocatalytic efficiency for the degradation of RhB in solution. With the mass ratio of g-C3N4 increasing to 10 wt%, the Bi4Ti3O12/g-C3N4-10% presented the best photocatalytic activity. Its photocatalysis reaction constant was approximately 2 times higher than the single component Bi4Ti3O12 or g-C3N4. Meanwhile, good stability and durability for the Bi4Ti3O12/g-C3N4-10% were confirmed by the recycling experiment and FT-IR analysis. The possible mechanism for the improvements was the matched band positions and the effective separation of photo-excited electrons (e-) and holes (h+). Furthermore, based on the results of active species trapping, photo-generated holes (h+) and superoxide radical (·O2-) could be the main radicals in reaction.

Key words: Rhodamine B, Photocatalyst, Ultrasonic assisted synthesis, Bi4Ti3O12, g-C3N4