柑橘皮提取液绿色合成纳米Fe3O4及其吸附水中孔雀石绿的性能研究
Green Synthesis of Fe3O4 Nanomaterials Using Citrus Reticulata Peels Extract and its Application in Removal of Malachite Green
张梦凡 1李春光 1王聪 1王强 1杜晨阳 1柳雨晴 1杨洁 1王寒蕊1
作者信息
- 1. 郑州航空工业管理学院郑州市环境功能材料重点实验室,河南 郑州 450046
- 折叠
摘要
以柑橘皮提取液为还原剂和稳定剂,绿色合成Fe3O4纳米材料,利用扫描电子显微镜(SEM)、X射线衍射图谱(XRD)、傅立叶变换红外光谱(FT-IR)等手段对材料进行表征,并考察了其对孔雀石绿(MG)的吸附性能.结果表明:绿色合成纳米Fe3O4呈不规则圆球体,分散性和结晶度较好.在投加量为1.0 g/L、初始pH为4、温度为25 ℃、初始浓度为20 mg/L时,对孔雀石绿的吸附率达到95.33％.纳米Fe3O4对MG的吸附过程分别符合准二级动力学方程和Langmuir等温方程.热力学研究表明,纳米Fe3O4吸附MG是自发吸热过程.绿色合成纳米Fe3O4重复利用4次吸附率仍在70％以上.
Abstract
The Fe3O4 nanomaterials were green-synthesized by the peels extract of Citrus reticulata as the reducing agent and stabilizer.The physical and chemical properties of Fe3O4 nanomaterials were characterized with scanning electron microscope(SEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),and the adsorp-tion performance of Malachite Green was investigated.The results show that green synthetic nano-Fe3O4 is an irregu-lar sphere with good dispersion and crystallinity.The adsorption rate of MG can reach 95.33％when the adsorption time of 2 h,solution pH of 4,material dosage of 20 mg,MG concentration of 20 mg/L,at 25 ℃.The results showed that the adsorption kinetics and adsorption isotherm of MG adsorption by nano-Fe3O4 were mainly inaccordance with the pseudo-second-order kinetics model,and Langmuir model.Thermodynamic studies showed that the adsorption process of MG onto nano-Fe3O4 was an endothermic process with spontaneous.The adsorption rate can reach more than 70％after reuse for 4 times.
关键词
柑橘皮/绿色合成/纳米Fe3O4/孔雀石绿/吸附Key words
citrus reticulata peels/green synthesis/nano-Fe3O4/malachite green/adsorption引用本文复制引用
基金项目
国家自然科学基金(21771165)
河南省科技攻关计划(222102310285)
郑州航院研究生教育创新计划(2023CX73)
出版年
2024
NETL
NSTL
万方数据