无机材料学报 ›› 2021, Vol. 36 ›› Issue (10): 1047-1052.DOI: 10.15541/jim20210078 CSTR: 32189.14.10.15541/jim20210078

• 研究论文 • 上一篇    下一篇

DFT方法研究一氧化氮在铬掺杂石墨烯上的吸附行为

何俊龙1(), 宋二红2(), 王连军1(), 江莞1   

  1. 1.东华大学 材料科学与工程学院, 上海 201620
    2.中国科学院 上海硅酸盐研究所, 高性能陶瓷和超微结构国家重点实验室, 上海 200050
  • 收稿日期:2021-02-05 修回日期:2021-03-02 出版日期:2021-10-20 网络出版日期:2021-03-15
  • 通讯作者: 宋二红, 副研究员. E-mail: ehsong@mail.sic.ac.cn; 王连军, 教授. E-mail: wanglj@dhu.edu.cn
  • 作者简介:何俊龙(1996-), 男, 硕士研究生. E-mail: woaichenzy@outlook.com
  • 基金资助:
    国家自然科学基金青年基金(51702345);上海市自然科学基金(21ZR1472900)

DFT Calculation of NO Adsorption on Cr Doped Graphene

HE Junlong1(), SONG Erhong2(), WANG Lianjun1(), JIANG Wan1   

  1. 1. College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
    2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2021-02-05 Revised:2021-03-02 Published:2021-10-20 Online:2021-03-15
  • Contact: SONG Erhong, associate professor. E-mail: ehsong@mail.sic.ac.cn; WANG Lianjun, professor. E-mail: wanglj@dhu.edu.cn
  • About author:HE Junlong(1996-), Master candidate. E-mail: woaichenzy@outlook.com
  • Supported by:
    National Natural Science Foundation of China(51702345);Science and Technology Commission of Shanghai Municipality¬¬(21ZR1472900)

摘要:

石墨烯具有较高的比表面积, 其电导率会因吸附微量气体分子而发生显著变化, 有望用作超高灵敏度的气体传感器。本研究基于密度泛函理论(DFT)的计算方法, 探讨了NO在石墨烯和Cr掺杂石墨烯上的吸附行为, 通过对比吸附前后的各自体系的电子结构变化, 发现Cr掺杂石墨烯有助于增强对NO气体分子的吸附能力, 吸附能增大到-1.58 eV, 基底转移到吸附物的电荷数增大了一个数量级, 达到0.143 e, 显著提升了气体探测灵敏度。本研究为工业、环境和军事监测领域中开发新型NO气体传感器提供了新的设计思路。

关键词: 密度泛函理论, 石墨烯传感器, NO吸附, 过渡金属, Cr掺杂石墨烯

Abstract:

Graphene has recently become one of the best candidates for ultrasensitive gas detector, due to its huge specific surface area and good conductivity of heat and electricity. In this study, a density functional theory (DFT) calculation is proposed to explore NO adsorption on graphene and Cr doped graphene. Compared with electronic structures of the two systems, it is found that the Cr substitution significantly enhances the adsorption behavior of NO molecules (adsorption energy being increased to -1.58 eV), while more electrons transfer from the substrate to the adsorbate (0.143 e). Therefore, this Cr doped graphene is expected to be an excellent candidate for sensing NO gas.

Key words: density functional theory, graphene gas sensor, NO adsorption, transition metal, Cr doped graphene

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