温度和pH值对水溶液中氧化石墨烯还原特性的影响
emperature and pH effect on reduction of graphene oxides in aqueous solution
还原型氧化石墨烯（RGOs）通常用水合肼还原，但是水合肼类化合物具有强腐蚀性、易燃和高毒性，而且用该方法获得的RGOs 常常产生团聚。本文开发了一种能在水热环境中可控还原GOs的方法，系统探索了温度和pH值对RGOs还原结果的影响。通过衰减全反射红外光谱（ATR-FTIR）测试发现，随着反应温度从100到180 oC增加 以及溶液pH值从3到10增加，GOs显著地被还原为RGOs。并且通过透射电镜和场发射扫描电镜测试发现，随着温度和pH值的增加，RGOs的尺寸也从大逐渐变小。 本文研究提供了一种高效还原GOs的简易方法，所产生不同的纳米结构如孔型结构和量子点等将在光电子和生物医学方面有望得到应用。
In this paper, the reduced graphene oxides (RGOs) were usually obtained by hydrazine reduction, but hydrazine-related compounds are corrosive, highly flammable and very hazardous, and the obtained RGOs heavily aggregate. Here we extensively investigated the effect of temperature and pH value on the structure of RGOs in hydrothermal environments without any reducing agents. The attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectra showed that reduction rate of GOs remarkably increased with the temperature from 100 to 180 oC and with pH value from 3 to 10. It was found that the large-scale RGOs were cut into small nanosheets with size from several to few tens of nanometers with increasing temperature and duration. This study provides a feasible approach to controllably reduce GO with different nanostructures such porous structures and quantum dots for applications in optoelectronics and biomedicals
曾甜、台国安
化学生物化学生物工程学
材料加工工程水热合成还原型氧化石墨烯
hydrothermal synthesisreduced graphene oxidedeoxygenation
曾甜,台国安.温度和pH值对水溶液中氧化石墨烯还原特性的影响[EB/OL].(2014-01-02)[2025-08-23].http://www.paper.edu.cn/releasepaper/content/201401-82.点此复制
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