Fabrication of porous Zn_(2)TiO_(4)-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 

机构地区：[1]School of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China [2]Shandong Province Key Laboratory of Mine Mechanical Engineering,Shandong University of Science and Technology,Qingdao 266590,China

出　　处：《Rare Metals》2021年第6期1528-1535,共8页稀有金属（英文版）

基　　金：financially supported by the Distinguished Taishan Scholars in Climbing Plan(No.tspd20161006);Shandong Provincial Natural Science Foundation(No.ZR2019MEM049);the National Natural Science Foundation of China(Nos.51772176 and 51971121);Shandong Province Key Laboratory of Mine Mechanical Engineering(No.2019KLMM101)。

摘　　要：Porous Zn2 Ti04-ZnO microtubes have been successfully fabricated using chemical precipitation followed by a calcination process using a carbon fiber template.The porous Zn_(2)TiO_(4)-ZnO micro tubes with a diameter of~4μm consisted of Zn_(2)TiO_(4) and ZnO nanoparticles.These displayed worm-like pore structures.Carbon fibers played an important role during the porous Zn_(2)TiO_(4)-ZnO microtube formation process.The porous and hollow structure of Zn_(2)TiO_(4)-ZnO provided abundant active sensing sites and channels for gas adsorption and diffusion.The porous Zn_(2)TiO_(4)-ZnO microtubes exhibited improved gas sensing properties for acetone when compared with pure ZnO.The Zn_(2)TiO_(4)-ZnO sensor response was 33.4 for 100μg·ml^(-1) acetone at the optimum operating temperature(370℃).This was~2.7 times higher than that of pure ZnO.Additionally,the as-prepared porous Zn_(2)TiO_(4)-ZnO microtubes displayed sufficient long-term acetone stability and selectivity.This showed the potential application for acetone detection.The enhanced Zn_(2)TiO_(4)-ZnO gas sensing properties are due to the unique heterogeneous and porous structure,which was analyzed using the porous and band structure.

关 键 词：Zn_(2)TiO_(4) Zinc oxide POROUS Heterostructure Sensors 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TB383.4[自动化与计算机技术—控制科学与工程]