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SPECIAL TOPIC — Ion beam technology
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| SPECIAL TOPIC—Ion beam technology |
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Experimental and computational study of visible light-induced photocatalytic ability of nitrogen ions-implanted TiO2 nanotubes |
| Ruijing Zhang(张瑞菁)1, Xiaoli Liu(刘晓丽)1, Xinggang Hou(侯兴刚)1, Bin Liao(廖斌)2 |
1 College of Physics and Materials Science, Tianjin Normal University, Tianjin 300387, China;
2 Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China |
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Abstract Nitrogen-doped TiO2 nanotubes (TNTs) were prepared by ion implantation and anodic oxidation. The prepared samples were applied in photocatalytic (PC) oxidation of methyl blue, rhodamine B, and bisphenol A under light irradiation. To explore the influence of doped ions on the band and electronic structure of TiO2, computer simulations were performed using the VASP code implementing spin-polarized density functional theory (DFT). Both substitutional and interstitial nitrogen atoms were considered. The experimental and computational results propose that the electronic structure of TiO2 was modified because of the emergence of impurity states in the band gap by introducing nitrogen into the lattice, leading to the absorption of visible light. The synergy effects of tubular structures and doped nitrogen ions were responsible for highly efficient and stable PC activities induced by visible and ultraviolet (UV) light.
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Received: 02 January 2020
Revised: 13 January 2020
Accepted manuscript online:
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PACS:
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85.40.Ry
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(Impurity doping, diffusion and ion implantation technology)
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81.07.De
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(Nanotubes)
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71.15.Mb
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(Density functional theory, local density approximation, gradient and other corrections)
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| Fund: Project supported by the National Natural Science Foundation for Joint Fund Key Project of China (Grant No. U1865206), the National Science and Technology Major Project of China (Grant No. 2017-VII-0012-0107), the National Defense Science and Technology Key Laboratory Fund of China (Grant No. 614220207011802), and the Key Area Research and Development Program of Guangdong Province, China (Grant No. 2019B090909002). |
Corresponding Authors:
Xinggang Hou, Bin Liao
E-mail: hou226@tjnu.edu.cn;liaobingz@bnu.edu.cn
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Cite this article:
Ruijing Zhang(张瑞菁), Xiaoli Liu(刘晓丽), Xinggang Hou(侯兴刚), Bin Liao(廖斌) Experimental and computational study of visible light-induced photocatalytic ability of nitrogen ions-implanted TiO2 nanotubes 2020 Chin. Phys. B 29 048501
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