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06-08-2020 | Original Article

Fabrication of porous Zn₂TiO₄–ZnO microtubes and analysis of their acetone gas sensing properties

Authors: Xiao-Yan Chen, Xin-Zhen Wang, Feng-Jun Liu, Guo-Song Zhang, Xiao-Jie Song, Jian Tian, Hong-Zhi Cui

Published in: Rare Metals | Issue 6/2021

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Abstract

Porous Zn₂TiO₄–ZnO microtubes have been successfully fabricated using chemical precipitation followed by a calcination process using a carbon fiber template. The porous Zn₂TiO₄–ZnO microtubes with a diameter of ~ 4 μm consisted of Zn₂TiO₄ and ZnO nanoparticles. These displayed worm-like pore structures. Carbon fibers played an important role during the porous Zn₂TiO₄–ZnO microtube formation process. The porous and hollow structure of Zn₂TiO₄–ZnO provided abundant active sensing sites and channels for gas adsorption and diffusion. The porous Zn₂TiO₄–ZnO microtubes exhibited improved gas sensing properties for acetone when compared with pure ZnO. The Zn₂TiO₄–ZnO sensor response was 33.4 for 100 μg·ml⁻¹ acetone at the optimum operating temperature (370 °C). This was ~ 2.7 times higher than that of pure ZnO. Additionally, the as-prepared porous Zn₂TiO₄–ZnO microtubes displayed sufficient long-term acetone stability and selectivity. This showed the potential application for acetone detection. The enhanced Zn₂TiO₄–ZnO gas sensing properties are due to the unique heterogeneous and porous structure, which was analyzed using the porous and band structure.

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previous article Recent developments of nanomaterials-based conductive type methane sensors

next article Mechanically exfoliated MoS2 nanosheets decorated with SnS2 nanoparticles for high-stability gas sensors at room temperature

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Title: Fabrication of porous Zn2TiO4–ZnO microtubes and analysis of their acetone gas sensing properties
Authors: Xiao-Yan Chen
Xin-Zhen Wang
Feng-Jun Liu
Guo-Song Zhang
Xiao-Jie Song
Jian Tian
Hong-Zhi Cui
Publication date: 06-08-2020
Publisher: Nonferrous Metals Society of China
Published in: Rare Metals / Issue 6/2021
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI: https://doi.org/10.1007/s12598-020-01518-x

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