葡萄糖碳化物/海泡石复合材料制备工艺及响应面法优化

以葡萄糖和天然海泡石为原材料,利用水热碳化法制备了新型葡萄糖碳化物/海泡石复合材料,冷冻真空干燥法干燥样品。利用X射线衍射分析(XRD)、红外吸收光谱(IR)、扫描电镜(SEM)、比表面积(BET)对样品进行了表征,选择亚甲基蓝作为吸附质考察其吸附性能,并通过单因素和响应面法优化了材料制备的工艺。实验结果表明,复合材料制备最优工艺条件为:葡萄糖与海泡石质量比为1.49∶1.0、碳化时间为7.33 h(440 min);碳化温度为175℃,对亚甲基蓝的最优吸附量为45.22 mg/g;各因素对复合材料吸附亚甲基蓝性能的影响顺序为:碳化时间>碳化温度>葡萄糖与海泡石质量比。

Preparation of glucose carbide/sepiolite compositeand the optimization of response surface methodology

A new type of glucose-carbide/sepiolite composite was prepared by hydrothermal carbonization with glucose and natural sepiolite as raw materials,and then,the sample was dried by freeze vacuum drying.The composite samples were characterized by XRD,IR,SEM and BET,and methylene blue was selected as adsorbate to investigate its adsorption properties.The preparation technical conditions of the composite were optimized by the monofactor analysis and the response surface methodology.The results show that the optimum preparation conditions were as follows:the mass ratio of glucose to sepiolite was 1.49∶1.0,the carbonation time was 7.3 h,and the carbonation temperature was 175℃.The optimum adsorption capacity of methylene blue was 45.22 mg/g(composite).The order of the influence of the factors on the adsorption properties of methylene blue was:carbonation time>carbonation temperature>mass ratio of glucose to sepiolite.