Preparation and sensing properties of mesoporous ZnO–rGO composites based on in situ hydrothermal synthesis

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• 作者：Yue Shen ; Sicheng Luo ; Zhongrui Wu ; Meng Cao…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：27
• 期：12
• 页码：12660-12668
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1573-482X
• 卷排序：27

文摘

Zinc oxide/graphene (ZnO–rGO, rGO is short for reduced graphene) nano-composites were prepared by in situ reduction of zinc acetate((CH₃COO)₂Zn·2H₂O) and graphene oxide (GO) with a simple hydrothermal process assisted with Pluronic P123 triblock copolymer. Adsorbents of the gas sensing devices based on nanocomposite were prepared by coating method. The films have mesoporous structures and contain nano-crystalline phase, as evidenced from N₂ adsorption–desorption isotherms, X-ray diffraction and high resolution scanning electron microscopy. Gas sensing properties of pure ZnO and ZnO–rGO nano-composites were investigated in the temperature range of 100–300 °C. Compared with ZnO, ZnO–rGO nano-composite samples have enhanced hydrogen sulfide sensing properties. When the concentration of hydrogen sulfide reached 50 ppm, sensitivity of ZnO–rGO (5 wt%) reached 55.91 at 160 °C, which was about dozens of times higher than that of pure ZnO.