无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ
研究与开发

氮掺杂对金红石二氧化钛光电特性影响的理论研究

  • 侯艳 ,
  • 高成娟 ,
  • 吴希喆 ,
  • 资雪池 ,
  • 谢露 ,
  • 杨海征 ,
  • 闫宇星
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  • 曲靖师范学院化学与环境科学学院,云南 曲靖 655011
侯艳(1999— ),女,科研助理;E-mail:2750674897@qq.com

收稿日期: 2021-09-07

  网络出版日期: 2022-06-22

基金资助

云南省地方本科高校基础研究联合专项(202101BA070001-135);云南省教育厅科学研究基金项目(2021J0502)

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

  • Yan HOU ,
  • Chengjuan GAO ,
  • Xizhe WU ,
  • Xuechi ZI ,
  • Lu XIE ,
  • Haizheng YANG ,
  • Yuxing YAN
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  • College of Chemistry and Environmental Science,Qujing Normal University,Qujing 655011,China

Received date: 2021-09-07

  Online published: 2022-06-22

摘要

运用第一性原理LDA+U方法,计算不同浓度氮元素掺杂金红石相二氧化钛的能带结构、态密度和光学性质,研究显示氮元素的掺入使TiO2-x N x 体系带隙变窄。而O-2p与N-2p轨道杂化耦合在费米能级附近出现了杂质能级,促使载流子跃迁变容易,从而拓展了TiO2-x N x 体系对可见光的响应范围。此外,杂质能级对电子-空穴对的复合有抑制作用,对光催化活性的提升具有积极作用。研究结果表明,当氮元素掺杂量(x)为0.062 5时,TiO2-x N x 体系光吸收性能与光电响应较好。

本文引用格式

侯艳 , 高成娟 , 吴希喆 , 资雪池 , 谢露 , 杨海征 , 闫宇星 . 氮掺杂对金红石二氧化钛光电特性影响的理论研究[J]. 无机盐工业, 2022 , 54(6) : 90 -95 . DOI: 10.19964/j.issn.1006-4990.2021-0473

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.

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