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

• 作者: Xiao-Yan Chen Xin-Zhen Wang Feng-Jun Liu Guo-Song Zhang Xiao-Jie Song Jian Tian Hong-Zhi Cui
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: ADVANCED NANOMATERIALS FOR GAS AND HUMIDITY SENSORS
• 页码范围: 1528-1535
• 页数: 8页
• 语种: 英文

摘要

Porous Zn2TiO4-ZnO microtubes have been successfully fabricated using chemical precipitation fol-lowed by a calcination process using a carbon fiber tem-plate.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 com-pared with pure ZnO.The Zn2TiO4-ZnO sensor response was 33.4 for 100 μg·ml-1 acetone at the optimum operat-ing temperature (370 ℃).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 hetero-geneous and porous structure,which was analyzed using the porous and band structure.