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

无机盐工业 ›› 2024, Vol. 56 ›› Issue (8): 33-39.doi: 10.19964/j.issn.1006-4990.2023-0511

• 研究与开发 • 上一篇    下一篇

二维碳化钛/氧化锌纳米颗粒的制备及其乙醇气敏性能研究

李曌1(), 尹优优1,3, 刘晨辉1, 王访1, 高冀芸1,2()   

  1. 1.云南民族大学化学与环境学院,云南 昆明 650500
    2.云南省教育厅环境功能材料重点实验室,云南 昆明 650500
    3.红河卫生职业学院,云南 红河 651400
  • 收稿日期:2023-10-22 出版日期:2024-08-10 发布日期:2024-09-26
  • 通讯作者: 高冀芸(1989— ),女,博士,讲师,主要研究方向为微纳气体传感器开发及低浓度有害气体检测;E-mail:jiyungao89@163.com
  • 作者简介:李曌(2002— ),女,主要研究方向为微纳气体传感器开发及低浓度有害气体检测;E-mail:lz1103606664@163.com
  • 基金资助:
    云南省教育厅科学研究基金项目(2022J0441);大学生创新创业项目

Study on preparation of two⁃dimensional titanium carbide/zinc oxide nanoparticles and their ethanol gas sensitive properties

LI Zhao1(), YIN Youyou1,3, LIU Chenhui1, WANG Fang1, GAO Jiyun1,2()   

  1. 1.School of Chemistry and Environment,Yunnan Minzu University,Kunming 650500,China
    2.Key Laboratory of Environmental Functional Materials,Yunnan Provincial Department of Education,Hongehe 650500,China
    3.Honghe Health Vocational College,Honghe 651400,China
  • Received:2023-10-22 Published:2024-08-10 Online:2024-09-26

摘要:

通过水热法和液相化学刻蚀法分别制备氧化锌纳米颗粒(ZnO NPS)和二维层状碳化钛(Ti3C2T x ),采用静电自组装技术得到不同质量比的碳化钛/氧化锌(Ti3C2T x /ZnO)复合材料,通过丝网印刷得到气敏传感膜,并研究了其气敏特性。通过X射线粉末衍射(XRD)、扫描电子显微镜(SEM)等方法对合成材料进行了结构表征。结果表明,ZnO NPs均匀分布在具有二维手风琴状的Ti3C2T x 表面并穿插在层间。在复合材料对乙醇、丙酮、甲醇、甲醛、甲苯等5种典型的挥发性有机物(VOCs)气体的检测中,发现其对乙醇气体表现出优异的传感性能。在最佳工作温度(250 ℃)下,样品M/ZNPS1(Ti3C2T x 质量分数为6.25%)对体积分数为0.01%的乙醇灵敏度(Ra/Rg=11.27)比纯Ti3C2T xRa/Rg=1.28)高约8.8倍,且具有出色的响应/恢复时间(4 s/8 s)和优异的选择性、长期稳定性。着重从载流子在电极间的输运行为角度对Ti3C2T x /ZnO复合材料的气敏机理进行了讨论,该材料对低浓度乙醇气体的检测有着潜在的应用前景。

关键词: 碳化钛/氧化锌复合材料, 静电自组装, 乙醇气敏传感器, 敏感机理

Abstract:

Zinc oxide nanoparticles(ZnO NPs) and two⁃dimensional layered titanium carbide(Ti3C2T x ) were synthesized via hydrothermal method and liquid phase chemical etching,respectively.Titanium carbide/zinc oxide(Ti3C2T x /ZnO) composites with varying mass ratios were prepared using electrostatic self⁃assembly technology.Gas⁃sensitive sensing films were fabricated through screen printing and their gas sensitive properties were studied.The composite structure was characterized by X-ray powder diffraction(XRD) and scanning electron microscopy(SEM).The results showed that ZnO NPs were uniformly distributed on the surface of Ti3C2T x with a two⁃dimensional accordion shape and interspersed between layers.In the detection of five typical VOCs gases including ethanol,acetone,methanol,formaldehyde,and toluene,the composite exhibited excellent sensing performance towards ethanol gas.At an optimal operating temperature of 250 ℃,M/ZNPS1(with a Ti3C2T x mass fraction of 6.25%) displayed a sensitivity(Ra/Rg=11.27) to ethanol at a volume fraction of 0.01%,which was 8.8 times higher than that of pure Ti3C2T x alone(Ra/Rg=1.28).Furthermore,it demonstrated exceptional response/recovery time characteristics(4 s/8 s),as well as remarkable selectivity and long⁃term stability.The gas⁃sensitive mechanism of Ti3C2T x /ZnO composites was discussed from the point of view of carrier transport between electrodes,which had a potential application prospect for low concentration ethanol gas.

Key words: titanium carbide/zinc oxide composites, electrostatic self?assembly, ethanol gas?sensitive sensor, sensitive mechanism

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