Synthesis of morphology-controlled ZnO microstructures via a microwave-assisted hydrothermal method and their gas-sensing property

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• 作者：Sa Liang^a ; ¹ ; Lianfeng Zhu^b ; ¹ ; Guosheng Gai^b ; Youwei Yao^c ; Jue Huang^c ; Xuewen Ji^d ; Xiaoming Zhou^a ; Dongyun Zhang^a ; Peixin Zhang^a ; ^{pxzhang@szu.edu.cn" class="auth_mail}
• 关键词：ZnO ; Microwave ; Hydrothermal ; Ethanol ; Gas sensors
• 刊名：Ultrasonics Sonochemistry
• 出版年：July, 2014
• 年：2014
• 卷：21
• 期：4
• 页码：1335-1342
• 全文大小：2746 K

文摘

Controllable ZnO architectures with flower-like and rod-like morphologies were synthesized via a microwave-assisted hydrothermal method. By adjusting the concentration of Zn²⁺ 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.