【摘要】 通过化学还原法制备了以石墨烯为核树状大分子包覆Co纳米复合材料。利用FTIR、TG、XRD和TEM对所制备产物进行了结构表征。考察了不同p H、吸附时间和温度条件下,制备的以石墨烯为核第三代数树状大分子纳米复合材料(G3.0-PAMAM/Co)对刚果红吸附效果的影响。结果表明,G3.0-PAMAM/Co对刚果红是强有力的磁性吸附剂;对刚果红的吸附动力学能符合Lagergren准二级吸附模型,主要为化学吸附;吸附热力学能符合Langmuir等温吸附模型,最大吸附量可达161.49 mg/g。更多还原

【Abstract】 Polyamidoamine( PAMAM) dendrimers with graphene as core encapsulated Co nanocomposites which was prepared by chemical reduction method. The samples were characterized by means of FTIR,TG,XRD and TEM. The effect of p H value,adsorption time and temperature conditions on the third generations of PAMAM dendrimer with graphene as core nanocomposite( G3. 0-PAMAM /Co) tested for Congo red adsorption performance were studied. The results showed that G3. 0-PAMAM /Co was strong magnetic adsorbent for Congo red. The adsorption process of Congo red on G3. 0-PAMAM /Co could be described with the Lagrangian pseudo-second-order kinetic model. The results indicated that the adsorption process was mainly chemical adsorption. The thermodynamics of Congo red adsorption on the G3. 0-PAMAM / Co followed the Langmuir adsorption equation. The maximum adsorption amount was 161. 49 mg / g.更多还原