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
Preparation and catalytic properties of Fe3O4 magnetic composites supported by bimetallic Ag-Cu nanoparticles
董雄涛 1呼国茂 2邢艳 3周琛皓 1张瑾瑾 1白小慧 1高续春 3丁新燕 1马向荣1
作者信息
- 1. 榆林学院化学与化工学院,陕西榆林 719000
- 2. 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
- 3. 榆林学院化学与化工学院,陕西榆林 719000;陕西省低变质煤洁净利用重点实验室,陕西榆林 719000
- 折叠
摘要
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.
Abstract
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.
关键词
Fe3O4@EDTA/共还原剂/双金属Ag-Cu纳米粒子/催化活性Key words
Fe3O4@EDTA/Co-reducing agent/Bimetallic Ag-Cu nanoparticle/Catalytic activity引用本文复制引用
基金项目
国家自然科学基金(52262015)
国家自然科学基金(51762042)
陕西省低变质煤洁净利用重点实验室项目(21JS047)
陕西省科技厅项目(2024GX-YBXM-429)
陕西省科技厅青年项目(2024JC-YBQN-0153)
榆林市科协青年人才托举计划(20220405)
榆林市科协青年人才托举计划(20210343)
国家级大学生创新创业训练计划(S202311395040)
国家级大学生创新创业训练计划(S202311395038)
榆林市科技局项目(2023-CXY-148)
榆林市科技局项目(2023-CXY-149)
榆林市科技局项目(2023-CXY-155)
出版年
2024
NETL
NSTL
万方数据