采用经典的Hummers法合成石墨烯,对合成温度、反应时间、氧化剂的添加量、还原剂的加入量等实验条件进行改变,研究了影响合成的关键工艺.结果表明:控制高温反应的温度在90～100℃范围内是提高产率最为关键的因素.控制低温反应的温度接近0℃,中温反应的温度为30～45℃,保证反应时间分别大于30min和60min,并添加过量的氧化剂,可以使产率得到一定的提高.%Graphene was prepared by the classic Hummers method. By changing reaction temperature, reaction time, oxidant addition and reductant addition, the key processes that influenced the preparation were studied. The result shows that keeping the high temperature stage in the range of 90-100℃ is the most important factor to ensure high yield. In order to improve yield, the low and intermediate temperature stages should be kept close to 0℃ and 30-45℃, and the reaction time should be longer than 30min and 60min respectively. Moreover, excess oxidants is also an important factor.
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