Inorganic Chemicals Industry ›› 2022, Vol. 54 ›› Issue (6): 90-95.doi: 10.19964/j.issn.1006-4990.2021-0473

• Research & Development • Previous Articles     Next Articles

Theoretical study on effect of nitrogen doping on photoelectric properties of rutile TiO2

HOU Yan(),GAO Chengjuan,WU Xizhe,ZI Xuechi,XIE Lu,YANG Haizheng,YAN Yuxing()   

  1. College of Chemistry and Environmental Science,Qujing Normal University,Qujing 655011,China
  • Received:2021-09-07 Online:2022-06-10 Published:2022-06-22
  • Contact: YAN Yuxing E-mail:2750674897@qq.com;yanyx@mail.qjnu.edu.cn

Abstract:

Using first?principles LDA+U method,the band structure,density of states and optical properties of rutile TiO2 doped with different concentrations of N element were calculated.Investigation indicated that the band gap of TiO2-x N2 system was narrowed by the N-dopant.Meanwhile,the impurity level formed by the hybrid coupling of O-2p and N-2p orbitals arised near the Fermi level,it made the carrier transition more readily and extended the response range of TiO2-x N x system to visible light.In addition,the impurity level inhibited the recombination of electron?hole pairs and exerted positive effect on the improvement of photocatalytic activity.The research result showed that when N doping amount was 0.062 5,the optical absorption performance and the corresponding photoelectric response of TiO2-x N x system were better.

Key words: N-doping, rutile TiO2, first?principles, optical properties

CLC Number: