摘要非均相芬顿技术由于其催化效率高、操作简单等显著优点近年来受到研究者们的广泛关注。本论文以中空介孔硅球为载体、硫酸亚铁和硝酸铜为活性组分前驱体，采用浸渍还原的方法，将铁铜纳米粒子负载在中空介孔硅球上，并通过控制铁盐和铜盐前驱体引入量的不同，制备出铁铜比可调控的负载型复合催化剂。采用XRD、TEM、SEM、N2吸附-脱附、FT-IR对其结构进行表征。并以金橙II为目标污染物，对其芬顿催化性能进行了研究。研究表明， 所制备的催化剂具有比表面积高、孔径分布均一、活性粒子分散等特点；对金橙II的降解展现出优异的催化性能。其中，在2Fe6Cu/HMS催化剂投加量为1g/L，H2O2浓度为27.4mmol/L，30℃，初始pH为7条件下，经2h对100mg/L金橙II去除率可达92.8%，材料重复使用5次后，对金橙II的降解依然保持75.1%的去除率。表明负载型铁铜双金属中空介孔硅球复合材料具有良好的催化性、可重复利用性和稳定性。28425
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 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:http://www.youerw.com/huaxue/lunwen_23266.html