磁性共价有机框架材料的制备及其对铬黑T的吸附性能研究  

Preparation of magnetic covalent organic framework materials and its application for absorption of eriochrome black-T

作　　者：韦云娇 朱世凤 韦增宝 牙昌纯 邓咏仪 吕红玲 顾家维 陆俊宇 WEI Yun-jiao;ZHU Shi-feng;WEI Zeng-bao;YA Chang-chun;DENG Yong-yi;LV Hong-ling;GU Jia-wei;LU Jun-yu(College of Chemistry and Biology Engineering,Hechi University,Yizhou 546300,China)

机构地区：[1]河池学院化学与生物工程学院,广西宜州546300

出　　处：《化学研究与应用》2022年第8期1839-1847,共9页Chemical Research and Application

基　　金：广西自然科学基金项目(2018GXNSFAA138140,2020GXNSFBA297138,2022GXNSFAA035470)资助;河池学院高层次人才科研启动费项目(2021GCC022)资助;河池学院大学生创新创业训练项目(202110605014,S202110605093)资助。

摘　　要：利用原位生长法合成一种磁性共价有机框架材料(Fe_(3)O_(4)@TpBD),并研究该材料对有机染料的吸附性能。采用X-射线衍射、红外光谱、透射电镜和N_(2)吸附与脱附分析等技术对所制备的材料进行表征。以Fe_(3)O_(4)@TpBD复合材料对铬黑T进行吸附实验,结果表明,该材料对铬黑T的吸附过程符合Langmuir吸附等温模型和拟二级动力学模型。在吸附时间为150 min、溶液pH值为7.0、初始浓度为180 mg/L时,其最大吸附量为184.45 mg/g。进一步研究证明,Fe_(3)O_(4)@TpBD可以再生,即使经过7个循环后,其对铬黑T的吸附也没有明显降低。该材料与铬黑T分子存在氢键和π-π堆积等相互作用,从而使该材料对铬黑T的吸附表现出优异的性能。实验结果表明,该材料对水体中铬黑T染料的吸附与去除有潜在的应用价值。A magnetic covalent organic framework(Fe_(3)O_(4)@TpBD)was synthesized by in-situ growth method,and the adsorption performance of Fe_(3)O_(4)@TpBD on organic dyes was studied.The Fe_(3)O_(4)@TpBD was characterized by X-ray diffraction,Fourier transform infrared,transmission electron microscopy,and N_(2) adsorption-desorption analysis.The maximum adsorption capacity of Fe_(3)O_(4)@TpBD for eriochrome black-T was calculated to be 184.45 mg/g(t=150 min,pH=7.0 and C_(0)=180 mg/L),the adsorption isotherms and adsorption kinetics conformed to the Langmuir adsorption isotherm model and the Pseudo-second-order kinetic model,respectively.Further studies indicate that the Fe_(3)O_(4)@TpBD can be regenerated and no appreciable loss in the adsorption of eriochrome black-T is observable even after seven cycles.The possible adsorption mechanism of Fe_(3)O_(4)@TpBD was mainly based on chemical adsorption,involving multiple interactions through hydrogen bond andπ-πstacking etc.The experimental results show that the Fe_(3)O_(4)@TpBD has great potential application for the adsorption of chrome black T dye in water.

关 键 词：共价有机框架 Fe_(3)O_(4)磁性微球 吸附 铬黑T 

分 类 号：O633.1[理学—高分子化学] O633.2[理学—化学]