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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (6): 1050-1060.DOI: 10.16553/j.cnki.issn1000-985x.2024.0314

• 研究论文 • 上一篇    下一篇

Pt修饰AlN单层对C2H6和C6H6吸附和气敏特性的第一性原理研究

莫秋燕1(), 吴家隐2(), 荆涛3   

  1. 1.凯里学院大数据工程学院,凯里 556011
    2.广东开放大学(广东理工职业学院)工程技术学院,广州 510091
    3.凯里学院理学院,凯里 556011
  • 收稿日期:2024-12-12 出版日期:2025-06-20 发布日期:2025-06-23
  • 通信作者: 吴家隐,博士,副教授。E-mail:jiayinwu@foxmail.com
  • 作者简介:莫秋燕(1985—),女,广西壮族自治区人,副教授。E-mail:103047249@qq.com
  • 基金资助:
    凯里学院一体化科研项目(YTH-XM2025005);黔东南州科技支撑计划项目(黔东南科合支撑〔2024〕0020号)

First-Principle Study on the Gas Sensing Properties of C2H6 and C6H6 with Pt Modified AlN Monolayer

MO Qiuyan1(), WU Jiayin2(), JING Tao3   

  1. 1.Big Data Engineering College,Kaili University,Kaili 556011,China
    2.Department of Engineering Technology,Guangdong Polytechnic Institute,Guangdong Open University,Guangzhou 510091,China
    3.School of Science,Kaili University,Kaili 556011,China
  • Received:2024-12-12 Online:2025-06-20 Published:2025-06-23

摘要: 本文采用第一性原理计算方法系统研究了C2H6和C6H6 两种有机气体在氮化铝(AlN)单层及Pt修饰AlN的吸附特性。研究结果表明:对于C2H6,当其吸附在本征AlN单层上时,表现出较小的吸附能和电荷转移量,导致AlN单层对C2H6的敏感性较差;在Pt修饰后,AlN单层对C2H6的吸附性能没有明显提高。相比之下,Pt修饰提高了AlN单层对C6H6的吸附能力,Pt修饰AlN对C6H6的吸附能为-0.564 eV,通过带隙和功函数的变化,Pt修饰AlN单层对C6H6表现出更高的灵敏度。此外,适中的吸附能量和在室温下较短的恢复时间(3.45×10-4 s)表明,Pt修饰的AlN单层在检测C6H6分子时还具有良好的可重复性。研究为C2H6和C6H6在Pt修饰AlN单层上的吸附行为提供了详细的微观解析,可促进AlN基材料在气敏领域的应用。

关键词: 氮化铝单层; 吸附; Pt修饰; 第一性原理; 电子结构; 乙烷;

Abstract: This paper systematically studied the adsorption characteristics of C2H6 and C6H6 on aluminum nitride (AlN) and Pt modified AlN monolayers using first-principles calculations. The research results indicate that, for C2H6, intrinsic AlN monolayer exhibits lower adsorption energy and charge transfer amount, resulting in poor sensitivity of AlN monolayer to C2H6. Further research has shown that even after Pt modification, the adsorption performance of AlN monolayers for C2H6 has not significantly improved. Therefore, AlN is not suitable as a gas sensing material for detecting C2H6. In contrast, the adsorption energy of C6H6 on Pt modified AlN monolayer is -0.564 eV, indicating that Pt modification enhances the adsorption capacity of AlN monolayers for C6H6. In addition, due to changes in bandgap and work function, Pt modified AlN monolayers exhibit higher sensitivity to C6H6. More importantly, the moderate adsorption energy and short recovery time at room temperature (3.45×10-4 s) indicate that Pt modified AlN monolayers have high sensitivity and good repeatability in detecting C6H6 molecules. The research results provide a microscopic explanation for the adsorption behavior of C2H6 and C6H6 on Pt modified AlN monolayers, promoting the further application of AlN based materials in the field of gas sensing.

Key words: AlN monolayer; adsorption; Pt modify; first-principles; electronic structure; C2H6; C6H6

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