甘蔗渣基氧化石墨烯制备条件的响应曲面法优化设计

以甘蔗渣为基质采用改进Hummers法制备氧化石墨烯(GO),利用响应曲面法优化实验设计对甘蔗渣为基质的GO制备条件进行优化。选取碳粉用量、高锰酸钾用量、浓硫酸用量和超声时间作为4个变量因素,以制备的GO的红外特征吸收峰强度为响应值,利用Design-Expert软件进行数据分析,确定甘蔗渣基GO的最佳条件为:碳粉用量3.39g、高锰酸钾用量4.21g、浓硫酸用量20.68mL、超声时间7.75h。扫描电子显微镜和傅里叶变换红外光谱仪分析表明,在最佳条件下制备的GO具有明显的片层结构,特征峰出现在1500cm^-1、2300cm^-1、2400cm^-1和3500cm^-1处。

Optimization design of preparation condition for bagasse based GO by RSM

Graphene oxide(GO)was prepared by using bagasse as base material,and through improved Hummers method.The preparation conditions of GO with bagasse as substrate were optimized by response surface methodology(RSM).The dosage of toner,dosage of potassium permanganate,dosage of concentrated sulfuric acid and ultrasonic time were selected as four variable factors.And the infrared characteristic absorption peak intensity of the prepared GO was taken as the response value.Then,data analysis was carried out using Design-Expert software.The optimum conditions for preparing GO from bagasse were as follows:carbon powder 3.39 g,potassium permanganate4.21 g,concentrated sulfuric acid 20.68 mL and ultrasonic time 7.75 h.The results of scanning electron microscopy and infrared spectroscopy shown that GO prepared under these conditions had obvious lamellar structure,with characteristic peaks at 1500 cm^-1,2300 cm^-1,2400 cm^-1and 3500 cm^-1,which were comparable to GO prepared by traditional materials.