Cu x O self-assembled mesoporous microspheres with effective surface oxygen vacancy and their room temperature NO2 gas sensing performance

  • Siyuan Li (李思远)
  • Mengting Wang (王梦婷)
  • Chaozheng Li (李朝峥)
  • Jiajia Liu (刘佳佳)
  • Meng Xu (徐萌)
  • Jia Liu (刘佳)
  • Jiatao Zhang (张加涛)


A series of Cu x O self-assembled mesoporous microspheres (SMMs), with different and controlled morphology (virus-like, urchin-like, spherical), were synthesized by facile liquid phase approach. The morphology of the as-prepared Cu x O SMMs was evolved from spherical to virus-like shape by controlling the ratio of DI water in solution. It can also realize the transformation from loose assembly to dense assembly by extending the reaction time. These Cu x O SMMs exhibited good response to NO2 gas at room temperature, benefiting from their 3D self-assembly structure. Among these the resulting virus-like CuxO SNMMs-based sensor exhibits largely enhanced response to 1 ppm NO2 gas at room temperature. The enhanced response of the virus-like Cu2O SMMsbased sensor can be ascribed to the high surface area, hierarchical 3D nanostructures, micropores for effective gas diffusion, the heterojunctions formed between CuO and Cu2O, and the existence of abundant surface oxygen vacancies.


self-assembly mesoporous Cuxoxygen vacancy NO2 gas sensing 

精准调控表面氧空位的Cu x O自组装介孔微球及其室温检测NO2的气敏性能


本文通过简单液相方法合成了一系列可控的、 不同形貌Cu x O自组装介孔微球(病毒状、 海胆状、 球形). 通过改变N,N二甲基甲酰胺(DMF)溶剂中痕量水的比例, 调控Cu x O微球形貌由球状发展为病毒状; 通过可控的化学动力学过程实现从疏松组装到紧密组装的演变. 由于其三维自组装结构, 这些Cu x O自组装介孔微球在室温下对NO2气体具有优良的响应特性. 结果表明, 病毒状Cu x O自组装介孔微球在 室温下对1 ppm NO2气体具有优异的敏感特性和响应特性. 气敏机理分析发现, 其优异气敏特性来源于病毒状Cu x O自组装介孔微球较高的比表面积、 分级三维纳米结构、 有效的气体扩散孔洞、 表面Cu2O/CuO的纳米异质界面以及表面有效的氧空位缺陷调控.



This work was supported by the National Natural Science Foundation (51501010, 91323301, 51631001, 51372025 and 21643003). Prof. Shaohua Shen’s group from Xi’an Jiaotong University is acknowledged for their support in the electron paramagnetic resonance (EPR) measurements.

Supplementary material

40843_2017_9224_MOESM1_ESM.pdf (2.7 mb)
CuxO self-assembled mesoporous microspheres with effective surface oxygen vacancy and their room temperature NO2 gas sensing performance


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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Siyuan Li (李思远)
    • 1
  • Mengting Wang (王梦婷)
    • 1
  • Chaozheng Li (李朝峥)
    • 1
  • Jiajia Liu (刘佳佳)
    • 1
  • Meng Xu (徐萌)
    • 1
  • Jia Liu (刘佳)
    • 1
  • Jiatao Zhang (张加涛)
    • 1
  1. 1.Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & EngineeringBeijing Institute of TechnologyBeijingChina

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