Ni-MOFs@GO复合材料吸附亚甲基蓝工艺优化及其性能研究  

Process optimization and adsorption performance of Ni-MOFs@GO composites for methylene blue

作　　者：张思轩 张爱佳 沈诗淳 单凤君[1] ZHANG Si-xuan;ZHANG Ai-jia;SHEN Shi-chun;SHAN Feng-jun(School of Chemical and Envirmental Engineering,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学化学与环境工程学院,辽宁锦州121001

出　　处：《化学研究与应用》2023年第1期39-46,共8页Chemical Research and Application

基　　金：辽宁省教育厅科学研究经费项目(JFL202015403)资助。

摘　　要：为了提高氧化石墨烯(GO)对阳离子染料的吸附效果,采用溶液共混法制备Ni-MOFs@GO复合材料。采用X射线衍射仪(XRD)、傅里叶红外光谱仪(FTIR)和扫描电子显微镜(SEM)对其结构和形貌进行了表征。采用响应曲面法(RSM)优化Ni-MOFs@GO对亚甲基蓝(MB)的吸附工艺。以Ni-MOFs@GO浓度、MB质量浓度和吸附温度3因素为变量,以MB吸附量为响应值,建立了二项式回归模型方程,确定最佳吸附条件,并进行动力学和热力学分析。结果表明:3因素的一次项和二次项对MB的吸附效果影响显著,交互项影响不明显。Ni-MOFs@GO对MB最佳吸附条件为Ni-MOFs@GO浓度为0.6 g·L^(-1),MB质量浓度为30 mg·L^(-1),吸附温度为26℃,MB吸附量为259.83 mg/g;吸附过程符合准二级动力学方程,吸附模型符合Freundlich等温线方程。Ni-MOFs@GO composites were prepared by solution blending method in order to improve the adsorption effect of graphene oxide(GO)on cationic dyes.Its structure and morphology were characterized by X-ray diffraction(XRD),Fourier transform infrared spectrometer(FTIR)and scanning electron microscope(SEM).Response surface methodology technique(RSM)was used to optimize the adsorption process of Ni-MOFs@GO for methylene blue(MB).Concentration of Ni-MOFs@GO,mass concentration of MB and adsorption temperature were variables.The adsorption capacity of MB was the response value.A quadratic model about the adsorption capacity associated with above factors was derived,through which the optimum adsorption conditions was gained.The kinetic equations and adsorption isotherms were fitted.The results showed that monomial terms and secondary terms of three factors had significant effects on the adsorption effect of MB,while the interaction terms had no obvious effect.The optimal adsorption conditions of Ni-MOFs@GO for MB were as follows:adsorption capacity of MB reaches 259.83 mg/g at the optimized conditions of the concentration of Ni-MOFs@GO was 0.6 g·L^(-1),mass concentration of MB is 30mg·L^(-1),adsorption temperature was 26℃.The adsorption process was in keeping with the quasi-second-order kinetic equation.The adsorption model was in keeping with Freundlich isotherm equation.

关 键 词：金属有机骨架材料 氧化石墨烯 亚甲基蓝 吸附 优化 

分 类 号：O647.3[理学—物理化学]