用于水中有机污染物处理的Co_(3)O_(4)/TiO_(2)/多孔炭复合材料  

Co_(3)O_(4)/TiO_(2)/porous carbon for organic wastewater treatment

作　　者：张书泉[1] 徐敏 王国滔 ZHANG Shuquan;XU Min;WANG Guotao(College of Zhicheng,Fuzhou University,Fuzhou 350002,Fujian,China)

机构地区：[1]福州大学至诚学院,福建福州350002

出　　处：《化工进展》2021年第8期4600-4609,共10页Chemical Industry and Engineering Progress

基　　金：福建省自然科学基金(2018J01431);福建省教育厅中青年教师教育科研项目(JT180814);国家级大学生创新训练计划(202013470002);福建省高校杰出青年科研人才培育计划(ZJ1751)。

摘　　要：具有高吸附、强降解、易回收特性的新型功能材料在治理水中有机污染物上具有广泛的应用前景。本研究以多孔Ti基MOF材料NH_(2)-MIL-125(Ti)为前体,通过后修饰方法在孔洞中引入Co^(2+),再通过高温炭化制备得到Co_(3)O_(4)/TiO_(2)/多孔炭复合材料,并通过多种手段对复合材料进行了表征。实验用甲基橙模拟水中有机污染物,研究了复合材料对甲基橙的吸附性能、光催化降解性能及回收再利用能力。研究结果表明复合材料对甲基橙的吸附过程符合准二级动力学方程,其吸附能力随着复合材料中Co_(3)O_(4)含量先增加后减小,C120(5.23%Co_(3)O_(4)/48.72%TiO_(2)/多孔炭)具有最强的平衡吸附量,达到273.22mg/gsample。同时该样品对甲基橙也具有较强的光催化降解能力,并且由于Co_(3)O_(4)的强磁性,可以很容易地通过外磁场从水中分离。本工作为应用于有机废水处理的新型功能材料的开发提供了实验依据。Multifunctional materials with high adsorption ability,remarkable photocatalytic property,and easy recycle have a great potential in organic wastewater treatment.In this study,a multifunctional composite,Co_(3)O_(4)/TiO_(2)/porous carbon,was prepared through a three-steps process.Firstly,the porous MOF NH2-MIL-125(Ti)was synthesized.Secondly,Co^(2+) ions were introduced into the pores of NH2-MIL-125(Ti).And finally,the Co^(2+) embedded MOFs was pyrolyzed to transform into the composites.The composites were characterized by different methods.Methyl orange(MO)was then used as model organic pollutant to investigate the adsorption ability,photocatalytic property and recyclability of Co_(3)O_(4)/TiO_(2)/porous carbon.The results showed that the adsorption of MO on the composite was fitted well with a pseudo-second-order kinetic model.The equilibrium adsorption capacities of MO increased at first and then decreased with the increase of the amount of Co_(3)O_(4) in the composites.The sample C120 exhibited the highest equilibrium adsorption capacities of MO(273.22mg/gsample).Meanwhile,C120 exhibited strong photocatalytic ability,and can be easily separated from water by external magnetic field.This work provides a significant experimental basis for the development of new functional materials for organic wastewater treatment.

关 键 词：复合材料 吸附 降解 回收 

分 类 号：TB333[一般工业技术—材料科学与工程]