Zhang Shaolin, Hang Nguyen Thuy, Zhang Zhijun, Yue Hongyan, Yang Woochul
Department of Physics, Dongguk University, Seoul 04620, Korea.
School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China.
Nanomaterials (Basel). 2017 Jan 12;7(1):12. doi: 10.3390/nano7010012.
Graphitic carbon nitride (g-C₃N₄) nanosheets were exfoliated from bulk g-C₃N₄ and utilized to improve the sensing performance of a pure graphene sensor for the first time. The role of hydrochloric acid treatment on the exfoliation result was carefully examined. The exfoliated products were characterized by X-ray diffraction (XRD) patterns, scanning electron microscopy (SEM), atomic force microscopy (AFM), and UV-Vis spectroscopy. The exfoliated g-C₃N₄ nanosheets exhibited a uniform thickness of about 3-5 nm and a lateral size of about 1-2 µm. A g-C₃N₄/graphene nanocomposite was prepared via a self-assembly process and was demonstrated to be a promising sensing material for detecting nitrogen dioxide gas at room temperature. The nanocomposite sensor exhibited better recovery as well as two-times the response compared to pure graphene sensor. The detailed sensing mechanism was then proposed.
石墨相氮化碳（g-C₃N₄）纳米片从块状g-C₃N₄中剥离出来，并首次用于提高纯石墨烯传感器的传感性能。仔细研究了盐酸处理对剥离结果的作用。通过X射线衍射（XRD）图谱、扫描电子显微镜（SEM）、原子力显微镜（AFM）和紫外-可见光谱对剥离产物进行了表征。剥离的g-C₃N₄纳米片表现出约3-5nm的均匀厚度和约1-2μm的横向尺寸。通过自组装过程制备了g-C₃N₄/石墨烯纳米复合材料，并证明其是一种在室温下检测二氧化氮气体的有前途的传感材料。与纯石墨烯传感器相比，该纳米复合材料传感器表现出更好的恢复性能以及两倍的响应。随后提出了详细的传感机制。
