摘要
以三醛基间苯三酚和2,5-二氨基-1,4-苯二硫酚二盐酸盐为配体,采用常温常压溶剂法制备COFs-SH材料,并用红外光谱(FT-IR)以及扫描电镜(SEM)等技术手段对材料进行表征。为探究COFs-SH对Cu(Ⅱ)的吸附特性,通过批量实验分别在不同的初始浓度、时间、pH、反应温度下进行吸附后,使用火焰原子吸收分光光度计测定Cu(Ⅱ)浓度。结果表明:在一定浓度下,COFs-SH的吸附量随初始浓度的增加而增加,当初始浓度为500mg/L时到达最大吸附容量145.6mg/g,在不同pH环境下可以保持稳定的吸附性能。COFs-SH对Cu(Ⅱ)的吸附过程符合准二级动力学模型和Langmuir吸附模型。热力学结果表明,COFs-SH对Cu(Ⅱ)吸附是放热过程。所制COFs-SH材料在常温条件下可高效、稳定、环保地处理水体中的Cu污染,在水体Cu(Ⅱ)的去除具备潜在的应用价值。
In this work,a COFs-SH material was obtained by room temperature and pressure solvent method with triformylphenol and 2,5-diamino-1,4-benzenedithiol dihydrochloride as ligands,and characterized by Fourier-transform infrared spectroscopy(FT-IR)and scanning electron microscopy(SEM).To investigate the adsorption properties of COFs-SH for Cu(Ⅱ)in water,batch adsorption experiments were carried out at different initial concentrations,times,pH,and reaction temperatures,respectively,and the remaining Cu(Ⅱ)concentrations were measured by flame atomic absorption spectrophotometer.The experimental results showed that under a certain concentration,the adsorption capacity of COFs-SH increased with the increase of the initial concentration,and when the initial concentration was 500mg/L,it reached the maximum adsorption capacity of 145.6mg/g,and could maintain stable adsorption under different pH environments.The adsorption process of Cu(Ⅱ)by COFs-SH was consistent with the pseudo-second-order model and Freundlich isotherm model.The thermodynamic results revealed that the adsorption of Cu(Ⅱ)by COFs-SH composite was an exothermic process.The COFs-SH prepared in this experiment can treat copper pollution in water efficiently,stably and environmentally at room temperature,and has a potential application in the removal of Cu(Ⅱ)from water.
作者
陆素芬
韦云娇
姚东梅
韦东兴
韩雪
陆俊宇
Lu Sufen;Wei Yunjiao;Yao Dongmei;Wei Dongxing;Han Xue;Lu Junyu(College of Chemistry and Biology Engineering,Hechi University,Yizhou 546300;Guangxi Key Laboratory of Sericulture Ecology and Applied Intelligent Technology,Yizhou 546300)
出处
《化工新型材料》
CAS
CSCD
北大核心
2023年第8期205-210,共6页
New Chemical Materials
基金
广西自然科学基金项目(2022GXNSFAA035470、2020GXNSFBA297138)
广西中青年能力提升项目(2019KY0626)
大学生创新创业项目(202210605009、S202210605044)
河池学院项目(2021GCC022、2022XJYB004)。
关键词
共价有机框架
Cu(Ⅱ)
处理
吸附
covalent organic framework
Cu(Ⅱ)
treatment
adsorption
