摘要
Three-dimensional ordered macro/mesoporous carbon(3DOM/m-C)with high specific surface area was synthesized by colloid crystal template method with chemical activation by KOH and used as the adsorbent for removing malachite green(MG)in aqueous solution.The microstructures of the adsorbents were characterized by FESEM,TEM and BET,and the effects of initial dye concentration,contact time,solution pH,and temperature on adsorption performance were investigated.The results show that the 3DOM/m-C exhibits extremely high adsorption capacity of 3541.1 mg/g within 2 h,which could be attributed to the novel ordered hierarchical structure with mesopores on three-dimensional ordered macroporous carbon walls.And the adsorption behavior conforms to the pseudo-second-order kinetic and Langmuir adsorption isotherm.3DOM/m-C can be recycled after being desorbed by absolute ethanol,and still maintains a high capacity of 2762.06 mg/g after 5 cycles.
采用胶晶模板法和KOH化学活化法合成了具有高比表面积的三维有序大孔/介孔碳(3DOM/m-C),并研究其对溶液中孔雀石绿的去除情况。采用FESEM、TEM和BET对吸附剂的微观结构进行表征,研究初始染料浓度、接触时间、溶液pH值和温度对吸附的影响。结果表明,3DOM/m-C在2 h内吸附容量达到3541.1 mg/g,这可归因于三维有序大孔碳壁上产生了额外的介孔,形成了有序分级结构。吸附行为符合准二级动力学和Langmuir吸附等温模型。吸附完成后,3DOM/m-C可在无水乙醇脱附并循环使用,在5次循环后,吸附容量仍然保持在2762.06 mg/g。
基金
Projects(U1802254,51871201)supported by the National Natural Science Foundation of China
Project(LY18E040003)supported by the Zhejiang Provincial Natural Science Foundation,China
