首页|双金属Ag-Cu纳米粒子负载的Fe3O4磁性复合材料的制备及其催化性能

双金属Ag-Cu纳米粒子负载的Fe3O4磁性复合材料的制备及其催化性能

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通过溶剂热法合成中空多孔性Fe3O4@乙二胺四乙酸(EDTA)磁性载体;以柠檬酸钠和NaBH4为共还原剂将双金属Ag-Cu纳米粒子负载于Fe3O4@EDTA磁性载体(Fe3O4@EDTA@Ag-Cu NPs)的孔道内外,并采用XRD、SEM、TEM、EDX和VSM等技术对制备的磁性复合材料进行详细表征.t=25 ℃考察了 Fe3O4@EDTA@Ag-Cu NPs在NaBH4体系中对4-硝基苯胺的催化还原性能.结果表明,Fe3O4@EDTA@Ag-Cu NPs 的表观速率常数分别为 Fe3O4@EDTA@Cu NPs、Fe3O4@EDTA@Ag NPs的6.5、2.1倍,均符合一级动力学方程,证实了 Ag和Cu NPs之间具有明显的协同效应.Fe3O4@EDTA@Ag-Cu NPs经过5次循环利用后其催化降解率仍高于95％,表明该复合材料在水处理领域中具有潜在的应用价值.
Preparation and catalytic properties of Fe3O4 magnetic composites supported by bimetallic Ag-Cu nanoparticles
Firstly,the hollow porous magnetic Fe3O4@EDTA carrier was synthesized by hydrothermal method.Secondly,the bimetallic Ag-Cu nanoparticles were loaded on the inside and outside of the Fe3O4@EDTA carrier(Fe3O4@EDTA@Ag-Cu NPs)with sodium citrate and NaBH4 as co-reducing agent,and the obtained magnetic composites were characterized by XRD,SEM,TEM,EDX and VSM techniques in detail.Finally,the catalytic reduction performance of Fe3O4@EDTA@Ag-Cu NPs for 4-nitroaniline in NaBH4 system were explored at 25 ℃.The results showed that the apparent rate constant k of Fe3O4@EDTA@Ag-Cu NPs are 6.5 and 2.1 times higher than Fe3O4@EDTA@Cu and Fe3O4@EDTA@Ag NPs,respectively.All of them were consistent with the first-order kinetic equation,confirming an obvious synergistic effect between Ag and Cu NPs.Importantly,the catalytic degradation efficiency of Fe3O4@EDTA@Ag-Cu NPs remained above 95％after 5 times recycling,which indicated the potential application value in wastewater treatment.

Fe3O4@EDTACo-reducing agentBimetallic Ag-Cu nanoparticleCatalytic activity

董雄涛、呼国茂、邢艳、周琛皓、张瑾瑾、白小慧、高续春、丁新燕、马向荣

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榆林学院化学与化工学院,陕西榆林 719000

中国神华煤制油化工有限公司鄂尔多斯煤制油分公司,内蒙古鄂尔多斯 017209

陕西省低变质煤洁净利用重点实验室,陕西榆林 719000

Fe3O4@EDTA 共还原剂 双金属Ag-Cu纳米粒子 催化活性

国家自然科学基金国家自然科学基金陕西省低变质煤洁净利用重点实验室项目陕西省科技厅项目陕西省科技厅青年项目榆林市科协青年人才托举计划榆林市科协青年人才托举计划国家级大学生创新创业训练计划国家级大学生创新创业训练计划榆林市科技局项目榆林市科技局项目榆林市科技局项目

522620155176204221JS0472024GX-YBXM-4292024JC-YBQN-01532022040520210343S202311395040S2023113950382023-CXY-1482023-CXY-1492023-CXY-155

2024

化工科技
中国石油天然气股份有限公司吉林石化分公司

化工科技

CSTPCD
影响因子：0.386
ISSN：1008-0511
年,卷(期)：2024.32(1)
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