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Journal of Shanghai University >

2022 , Vol. 28 >Issue 2: 304 - 313

DOI: https://doi.org/10.12066/j.issn.1007-2861.2285

Research Articles

Controllable synthesis of ZnO with different structures and its effect on gas sensitivity

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  • School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

Received date: 2020-02-06

  Online published: 2021-05-10

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Abstract

The micromorphology of a material is the main factor that influencesits gas sensitivity. Applications of low-dimensional structuralmaterials are greatly limited because of agglomeration issues duringreactions. The performance of nanomaterials can be improved bydesigning and synthesising multilevel structures. Materialmorphology was mainly adjusted by controlling the hydrothermal time,the concentration of anionic surfactant citrate ions and hydroxideions. The ZnO nanomaterial synthesised under the controlledhydrothermal conditions had three types of morphologies,pompon-like, flaky-flower-shaped, and buns-like. The pompon-like ZnOshowed good gas sensitivity. At 340 $^\circ$C, itsgas-sensitive response to 100$\times10^{-6}$ n-butanol was 238,which was 2.12 times higher than that in case of ethanol, showinggood selectivity. In addition, by investigating the growth andsensing mechanisms of the multistage structure of ZnO, insights wereprovided for designing high-performance gas sensitive materialsusing multilevelarchitecture of ZnO.

Key words： multistage structure; ZnO; gas sensitivity

Cite this article

LI Shen, ZHOU Diwen, HE Xinhua, LI Fei, NING Zhukai, JIAO Zheng . Controllable synthesis of ZnO with different structures and its effect on gas sensitivity[J]. Journal of Shanghai University, 2022 , 28(2) : 304 -313 . DOI: 10.12066/j.issn.1007-2861.2285

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