应用化学 ›› 2021, Vol. 38 ›› Issue (7): 857-865.DOI: 10.19894/j.issn.1000-0518.200316

• 研究论文 • 上一篇    下一篇

原位生长的α-Fe2O3/ZnO异质纳米棒阵列对乙醇气体的高选择性检测

隋丽丽1*, 黄微微1, 王平1, 徐英明2*, 程晓丽2, 霍丽华2, 姜惠烨1, 赵冰1, 张文治1, 王政军1, 刘亚红1   

  1. 1齐齐哈尔大学化学与化学工程学院,齐齐哈尔 161006
    2黑龙江大学化学化工与材料学院,功能无机材料化学教育部重点实验室,哈尔滨 150080
  • 收稿日期:2020-10-23 接受日期:2021-01-06 出版日期:2021-07-01 发布日期:2021-09-01
  • 通讯作者: *E-mail:sui_leelee@126.com; xuyingming@hlju.edu.cn
  • 基金资助:
    国家自然科学基金(Nos.51802167,21771060,21776144,21978140)、科技部国际合作项目(No.2016YFE0115100)、黑龙江省自然科学基金(No.LH2019E127)和黑龙江省省属本科高校基本科研业务费(No.135409208)资助

In Situ Deposited Heterogeneous α-Fe2O3/ZnO Nanorod Arrays for Highly Selective Detection of Ethanol

SUI Li-Li1*, HUANG Wei-Wei1, WANG Ping1, XU Ying-Ming2*, CHENG Xiao-Li2, HUO Li-Hua2, JIANG Hui-Ye1, ZHAO Bing1, ZHANG Wen-Zhi1, WANG Zheng-Jun1, LIU Ya-Hong1   

  1. 1School of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China
    2Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
  • Received:2020-10-23 Accepted:2021-01-06 Published:2021-07-01 Online:2021-09-01
  • About author:National Natural Science Foundation of China (Nos.51802167, 21771060, 21776144, 21978140), the International Science & Technology Cooperation Program of China (No.2016YFE0115100), the Natural Science Foundation of Heilongjiang Province (No.LH2019E127) and the Fundamental Research Funds in Heilongjiang Provincial Universities (No.135409208).

摘要: 采用两步溶液法在陶瓷管上原位生长了ZnO纳米棒阵列,然后以ZnO纳米棒为载体,通过水热法在其表面负载α-Fe2O3纳米粒子,生成异质α-Fe2O3/ZnO复合纳米材料。 α-Fe2O3/ZnO纳米棒直径30~80 nm,长1 μm左右,交叉排列形成纳米棒阵列,α-Fe2O3纳米粒子粒径约10 nm,均匀分布在ZnO纳米棒表面。 将纯ZnO和α-Fe2O3/ZnO纳米棒阵列制成气敏元件,测试并对比了2种气敏元件的气敏性能,揭示其气敏机理。 结果表明:α-Fe2O3纳米粒子的复合显著提高了ZnO纳米棒阵列对乙醇气体的灵敏度和选择性,在工作温度370 ℃时,对100 μL/L乙醇气体的响应值为85.4,是同条件下ZnO器件对乙醇响应值(9.4)的9.1倍,响应时间7 s,最低检出限为0.01 μL/L。 相关研究可以应用于痕量乙醇的快速、高灵敏度和高选择性检测。

关键词: 原位生长法, α-Fe2O3, ZnO, 纳米棒阵列, 异质结构

Abstract: ZnO nanorod arrays were grown in situ on ceramic tubes by a two-step solution method. Then α-Fe2O3 nanoparticles were loaded on the surface of ZnO nanorods via a hydrothermal method to obtain heterogeneous α-Fe2O3/ZnO composites. The α-Fe2O3/ZnO nanorods are about 30~80 nm in diameter and 1 μm in length, which are cross-arranged to form nanorod arrays. α-Fe2O3 nanoparticles with a diameter of about 10 nm distributed on the surface of ZnO nanorods evenly. The gas-sensing properties of the sensors based on pristine ZnO and α-Fe2O3/ZnO nanorod arrays were compared, and the gas-sensing mechanism was revealed. The results show that the decoration of α-Fe2O3 nanoparticles significantly enhances the sensitivity and selectivity of ZnO nanorod arrays sensors to ethanol at the working temperature of 370 ℃. The response of α-Fe2O3/ZnO sensor to 100 μL/L of ethanol is 85.4, which is 9.1 times higher than that of pure ZnO sensor (9.4) determined under the same conditions. The response time is 7 s, and the detection limit is 0.01 μL/L. The work can be applied to the rapid, high sensitivity and selectivity detection for trace ethanol.

Key words: In situ growth, α-Fe2O3, ZnO, Nanorod arrays, Heterostructure

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