负载型铁铜双金属中空介孔硅球复合材料的制备及其芬顿催化性能研究
关键词 芬顿催化 铁铜双金属纳米粒子 中空有序介孔硅球 金橙 II 非均相
毕业论文设计说明书外文摘要
Title Iron-copper bimetallic nanoparticles supported on hollow mesoporous silica spheres:preparation and heterogeneous Fenton catalytic property
Abstract
Heterogeneous Fenton technology has been attracted extensive attention due to its high catalytic efficiency and simple operation. In this work, iron-copper bimetallic nanoparticles supported on hollow mesoporous silica spheres as a composite catalyst was synthesized via a post-impregnation and reduction strategy. The catalyst was characterized by XRD,TEM,SEM,nitrogen physisorption and FT-IR. To demonstrate the heterogeneous Fenton catalytic performance of the as-synthesized catalysts, orange II was chosen as a model contaminant. The results showed that the catalysts possess high specific surface area, narrow pore size distribution and iron-copper nanoparticles highly dispersed in the matrix of hollow mesoporous silica spheres. The catalytic results showed that 92..8 % of 100 mg/L orange II was removed during 2 h at the reaction conditions of 1g/L 2Fe6Cu/HMS and 27.4 mM H2O2 in 30 ℃ and pH=7. The stability and recoverability of the catalyst were assessed and retained high catalytic activity (75.1 % orange II removal efficiency) after 5 consecutive runs.
Keywords Fenton catalysis, iron copper bimetallic nanoparticles, hollow mesoporous silica spheres, Orange II, heterogeneous
目 次
1 绪论 1
1.1 研究背景 1
1.2 芬顿氧化技术 1
1.2.1 高级氧化技术概述 1
1.2.2 芬顿氧化技术 2
1.2.2.1 芬顿氧化技术概述 2
1.2.2.2 芬顿氧化技术的机理 2
1.2.2.2.1 羟基自由基机理 2
1.2.2.2.2 高化合价铁氧中间体机理 3
1.2.2.2.3 铁基芬顿催化剂 3
1.3 铁铜芬顿催化剂 4
1.3.1 铁铜芬顿催化剂概述 4
1.3.2 负载型铁铜双金属芬顿催化剂 5
1.3.2.1 沸石载体 5
1.3.2.2 离子交换树脂 6
1.3.2.3 多孔炭载体 7
1.3.2.4 MCM-41载体 8
1.3.3负载型铁铜双金属芬顿催化剂的合成 9
1.4 本课题研究的意义及主要研究内容 10
2 实验部分 11
2.1 实验试剂及仪器 11
2.2 FeCu/HMS的合成 12