中国物理B ›› 2020, Vol. 29 ›› Issue (11): 118102-.doi: 10.1088/1674-1056/ab9f29

• • 上一篇    下一篇

Zafar Ali1, Javaid Ismail1, Rafaqat Hussain2, A. Shah3, Arshad Mahmood3, Arbab Mohammad Toufiq4, Shams ur Rahman1,†()   

  • 收稿日期:2020-04-17 修回日期:2020-06-03 接受日期:2020-06-23 出版日期:2020-11-05 发布日期:2020-11-03

Hydrothermal synthesis and characterization of carbon-doped TiO2 nanoparticles

Zafar Ali1, Javaid Ismail1, Rafaqat Hussain2, A. Shah3, Arshad Mahmood3, Arbab Mohammad Toufiq4, and Shams ur Rahman1, †   

  1. 1 Department of Physics, COMSATS University Islamabad, Park Road, Islamabad 45550, Pakistan
    2 Department of Chemistry, COMSATS University Islamabad, Park Road, Islamabad 45550, Pakistan
    3 National Institute of Lasers and Optronics College, Pakistan Institute of Engineering and Applied Sciences (NILOP-C, PIEAS), Nilore 45650, Islamabad, Pakistan
    4 Department of Physics, Hazara University Mansehra, Mansehra 21300, Pakistan
  • Received:2020-04-17 Revised:2020-06-03 Accepted:2020-06-23 Online:2020-11-05 Published:2020-11-03
  • Contact: Corresponding author. E-mail: vitto.han@gmail.com
  • Supported by:
    The authors would like to thank the Higher Education Commission of Pakistan for providing funding (NRPU project 5349/Federal/NRPU/R&D/HEC/2016).

Abstract:

We report the hydrothermal growth of pure and doped TiO2 nanoparticles with different concentrations of carbon. The microstructure of the as-synthesized samples is characterized by x-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive x-ray spectroscopy (EDX), and Raman spectroscopy to understand the structure and composition. The XRD patterns confirm the formation of anatase phase of TiO2 with the average crystallite size is calculated to be in the range of 13 nm to 14.7 nm. The functional groups of these nanostructures are characterized by Fourier transformed infrared (FT-IR) spectroscopy, which further confirms the single anatase phase of the synthesized nanostructures. UV-visible absorption spectroscopy is used to understand the absorption behavior, which shows modification in the optical bandgap from 3.13 eV (pure TiO2) to 3.74 eV (1.2 mol% C-doped TiO2). Furthermore, the Ti3+ centers associated with oxygen vacancies are identified using electron paramagnetic resonance spectroscopy (EPR).

Key words: titanium dioxide, hydrothermal synthesis, defect states, bandgap