石墨烯
材料科学
拉曼光谱
X射线光电子能谱
纳米技术
扫描电子显微镜
透射电子显微镜
光致发光
多孔性
氧化物
热液循环
化学工程
光电子学
复合材料
光学
冶金
工程类
物理
作者
Jing Li,Weiguang Zhang,Jianbo Sun
标识
DOI:10.1016/j.ceramint.2016.03.083
摘要
Because of their potential applications in gas sensing and catalysis, reduced graphene oxide (RGO) and ZnO have been the focus of much recent attention. However, few reported materials have been produced via the combination of hierarchical ZnO structures with RGO to achieve high sensing performances. In this paper, a hydrothermal method was used to synthesize hierarchical porous ZnO nanoflowers, which were then combined with graphene to enhance their sensing performances. The rapid detection of 1 ppm NO2 was achieved at 174 °C. The morphologies and structures of these materials were characterized using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Raman spectroscopy. Photoluminescence measurements and X-ray photoelectron spectroscopy were also used to investigate the mechanism of gas sensing by these materials.
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