title: Synthesis of morphology-controlled ZnO microstructures via a microwave-assisted hydrothermal method and their gas-sensing property.
abstract: Controllable ZnO architectures with flower-like and rod-like morphologies were synthesized via a microwave-assisted hydrothermal method. By adjusting the concentration of Zn(2+) in the aqueous precursors, different morphologies of ZnO microstructures were obtained. The size of ZnO was uniform after ultrasonic treatment. The growth process of ZnO in solution was studied by monitoring the intermediate products, which were extracted at different stages of the reactions: (i) precursor preparation, (ii) microwave irradiation heating, (iii) natural cooling. Studies of the SEM images and XRD data revealed that the formation of ZnO occurred via in situ assembly or dissolution-reprecipitation of zinc hydroxide complexes. The morphology-dependent ethanol sensing performance was observed; the seven-spine ZnO structures exhibit the highest activity.
authors.affiliation: School of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, PR China.
authors.forename: Sa
authors.initials: S
authors.lastname: Liang
authors.affiliation: Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China.
authors.forename: Lianfeng
authors.initials: L
authors.lastname: Zhu
authors.affiliation: Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China.
authors.forename: Guosheng
authors.initials: G
authors.lastname: Gai
authors.affiliation: Graduated School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China.
authors.forename: Youwei
authors.initials: Y
authors.lastname: Yao
authors.affiliation: Graduated School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China.
authors.forename: Jue
authors.initials: J
authors.lastname: Huang
authors.affiliation: Shenzhen Dovelet Sensors Technology Co., Ltd., Shenzhen 518057, PR China.
authors.forename: Xuewen
authors.initials: X
authors.lastname: Ji
authors.affiliation: School of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, PR China.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Zhou
authors.affiliation: School of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, PR China.
authors.forename: Dongyun
authors.initials: D
authors.lastname: Zhang
authors.affiliation: School of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, PR China. Electronic address: pxzhang@szu.edu.cn.
authors.forename: Peixin
authors.initials: P
authors.lastname: Zhang
keywords: Ethanol; Gas sensors; Hydrothermal; Microwave; ZnO