School of Science, ‡School of Chemical Engineering, and §Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China.
ACS Appl Mater Interfaces. 2013 Dec 26;5(24):13333-9. doi: 10.1021/am404195u. Epub 2013 Dec 16.
A facile approach to prepare SnO2/rGO (reduced graphene oxide) hybrid nanoparticles by a direct redox reaction between graphene oxide (GO) and tin powder was developed. Since no acid was used, it is an environmentally friendly green method. The SnO2/rGO hybrid nanoparticles were characterized by ultraviolet-visible spectroscopy, Raman spectroscopy, thermogravimetric analysis, X-ray diffraction analysis, and X-ray photoelectron spectroscopy. The microstructure of the SnO2/rGO was observed with scanning electron microscopy and transmission electron microscopy. The tin powder efficiently reduced GO to rGO, and the Sn was transformed to SnO2 nanoparticles (∼45 nm) that were evenly distributed on the rGO sheets. The SnO2/rGO hybrid nanoparticles were then coated on an interdigital electrode to fabricate a humidity sensor, which have an especially good linear impedance response from 11% to 85% relative humidity.
一种通过氧化石墨烯（GO）和锡粉之间的直接氧化还原反应来制备 SnO2/rGO（还原氧化石墨烯）杂化纳米粒子的简便方法已经被开发出来。由于没有使用酸，因此这是一种环保的绿色方法。通过紫外-可见光谱、拉曼光谱、热重分析、X 射线衍射分析和 X 射线光电子能谱对 SnO2/rGO 杂化纳米粒子进行了表征。通过扫描电子显微镜和透射电子显微镜观察了 SnO2/rGO 的微观结构。锡粉有效地将 GO 还原为 rGO，Sn 被转化为 SnO2 纳米粒子（约 45nm），均匀分布在 rGO 片上。然后，将 SnO2/rGO 杂化纳米粒子涂覆在叉指电极上，以制备湿度传感器，其在相对湿度为 11%至 85%的范围内具有特别好的线性阻抗响应。
