Key Processes and Mechanism for Preparing Graphene by Hummers Method
He Te · Cailiao gongcheng · 2013
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.