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Template-free hydrothermal synthesis and gas-sensitivity of hollow-structured Cu0.3Co2.7O4 microspheres

中空结构Cu0.3Co2.7O4 微球的无模板水热合成和气敏性

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Abstract

Hollow-structured Cu0.3Co2.7O4 microspheres have been synthesized by a simple one-pot template-free hydrothermal method with copper sulfate, cobalt acetate and ammonia as raw materials. The products were characterized by powder X-ray diffraction, energy dispersive X-ray analysis, selected area electron diffraction, high-resolution transmission electron microscopy, scanning electron microscopy and BET measurements. The research results show that the hollow Cu0.3Co2.7O4 microspheres consist of single-crystalline nanocubes with the diameter of about 20 nm. The formation mechanism of hollow Cu0.3Co2.7O4 microspheres is suggested as Ostwald ripening in a solid-solution-solid process, and Cu0.3Co2.7O4 microspheres are mesoporous containing two pore sizes of 3.3 and 5.9 nm. The as-prepared Cu0.3Co2.7O4 sensors have optimal gas responses to 50×10−6 mg/m3 C2H5OH at 190 °C.

摘要

以硫酸铜、乙酸钴和氨为原料首次通过简单的无模板水热法可控合成了空心结构的Cu0.3Co2.7O4 微球。通过粉末X 射线衍射、能量色散X 射线分析、选区电子衍射、高分辨率透射电子显微镜、扫描 电子显微镜和BET 测量来表征产物。研究结果表明,空心Cu0.3Co2.7O4 微球由直径约20 nm 的单晶纳 米立方体组成。中空Cu0.3Co2.7O4 微球的形成是基于固溶-固相过程中的Ostwald 熟化作用。Cu0.3Co2.7O4 微球是中孔的,包含3.3 和5.9 nm 两种孔径。所制备的Cu0.3Co2.7O4 传感器在190 ℃下对50×10−6 C2H5OH 具有最佳的气体响应。

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Funding

Project(51202066) supported by the National Natural Science Foundation of China; Project(NCET-13-0784) supported by the Program for New Century Excellent Talents in University of China

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Authors and Affiliations

  1. School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China

    Li Tian  (田俐), Qiang Liu  (刘强), Jie-ling Wu  (吴杰灵) & Yi-tao Yi  (易益涛)

  2. Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan University of Science and Technology, Xiangtan, 411201, China

    Li Tian  (田俐), Qiang Liu  (刘强), Jie-ling Wu  (吴杰灵) & Yi-tao Yi  (易益涛)

  3. Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion, Hunan University of Science and Technology, Xiangtan, 411201, China

    Li Tian  (田俐), Qiang Liu  (刘强), Jie-ling Wu  (吴杰灵) & Yi-tao Yi  (易益涛)

  4. Hunan Provincial Key Defense Laboratory of High Temperature Wear-resisting Materials and Preparation Technology, Hunan University of Science and Technology, Xiangtan, 411201, China

    Li Tian  (田俐), Qiang Liu  (刘强), Jie-ling Wu  (吴杰灵) & Yi-tao Yi  (易益涛)

  5. School of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, 571158, China

    Li Tian  (田俐)

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  1. Li Tian  (田俐)
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Contributions

TIAN Li provided the concept and edited the draft of manuscript. LIU Qiang edited the draft of manuscript and conducted the literature review. WU Jie-ling and YI Yi-tao draw and modified the manuscript pictures. All authors replied to reviewers’ comments and revised the final version.

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Correspondence to Li Tian  (田俐).

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Conflict of interest

TIAN Li, LIU Qiang, WU Jie-ling and YI Yi-tao declare that they have no conflict of interest.

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Tian, L., Liu, Q., Wu, Jl. et al. Template-free hydrothermal synthesis and gas-sensitivity of hollow-structured Cu0.3Co2.7O4 microspheres. J. Cent. South Univ. 28, 1946–1954 (2021). https://doi.org/10.1007/s11771-021-4743-5

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  • DOI: https://doi.org/10.1007/s11771-021-4743-5

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