本文選題：Ag/Cu@Fe_3O_4　切入點(diǎn)：ZnFe_2O_4/rGO　出處：《天津大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：納米磁性復(fù)合材料是以納米級(jí)磁性材料獨(dú)特的磁學(xué)性能為基礎(chǔ)、通過(guò)功能化修飾結(jié)合其它功能的復(fù)合材料,應(yīng)用前景廣闊,被廣泛應(yīng)用于軍事工業(yè)、信息存儲(chǔ)、生物醫(yī)藥和環(huán)境保護(hù)等領(lǐng)域。當(dāng)前水環(huán)境因工業(yè)快速發(fā)展而遭受相當(dāng)程度的破壞,納米磁性復(fù)合材料在水處理中可以發(fā)揮重要作用:催化降解有機(jī)物和吸附染料,其一大特點(diǎn)就是依靠材料的超順磁性而重復(fù)利用,提高利用率,降低成本。本文制備了Ag/Cu@Fe_3O_4、ZnFe_2O_4/rGO和CuFe_2O_4/rGO納米磁性復(fù)合材料,分別用于對(duì)硝基苯酚的催化還原和亞甲基藍(lán)的吸附。(1)本論文中利用L-賴氨酸修飾化學(xué)共沉淀法制備了能穩(wěn)定分散的Fe_3O_4納米粒子,使其表面帶有氨基基團(tuán),并利用絡(luò)合作用使氨基與Ag+、Cu2+絡(luò)合,然后進(jìn)行化學(xué)還原,得到Ag/Cu@Fe_3O_4納米磁性復(fù)合粒子。采用傅里葉變換紅外光譜(FTIR)、透射電子顯微鏡(TEM)、能量分散X射線儀(EDX)、X射線衍射儀(XRD)和振動(dòng)樣品磁強(qiáng)計(jì)(VSM)等對(duì)所制備的納米粒子進(jìn)行了形貌、結(jié)構(gòu)及磁性能等表征。同時(shí)研究了Ag/Cu@Fe_3O_4納米磁性復(fù)合粒子催化還原對(duì)硝基苯酚的性能,研究表明其為高效的催化劑并且可以在外磁場(chǎng)作用下回收利用。(2)水熱法制備了ZnFe_2O_4/rGO納米磁性復(fù)合材料,通過(guò)實(shí)驗(yàn)確定了T=180℃、t=6h、水和乙二醇的混合溶劑是制備兼具磁性優(yōu)良和分散性較好的復(fù)合材料的最佳條件。另外ZnFe_2O_4/rGO復(fù)合磁性納米粒子可以催化對(duì)硝基苯酚的還原,且可以多次重復(fù)利用,充分發(fā)揮其磁性可回收的作用。(3)以水熱法制備了分散性好的CuFe_2O_4/rGO納米磁性復(fù)合材料,并以傅里葉變換紅外光譜(FTIR)、透射電子顯微鏡(TEM)、能量分散X射線儀(EDX)、X射線衍射儀(XRD)和振動(dòng)樣品磁強(qiáng)計(jì)(VSM)等表征了形貌、結(jié)構(gòu)及磁性能等,在此基礎(chǔ)上,也研究了其吸附亞甲基藍(lán)染料的性能并討論了不同反應(yīng)條件對(duì)吸附性能的影響。
[Abstract]:Nanomagnetic composites are based on the unique magnetic properties of nanometer magnetic materials, which are functionally modified and combined with other functions. It has a broad application prospect, and has been widely used in military industry and information storage. At present, the water environment has suffered considerable damage due to the rapid development of industry. Nano-magnetic composites can play an important role in water treatment: catalytic degradation of organic matter and adsorption of dyes, One of its characteristics is that it can be reused by the superparamagnetism of the material, increase the utilization ratio and reduce the cost. In this paper, the Ag-P / CuFe3O / CuFe_2O_4/rGO nanocomposites have been prepared. In this thesis, Fe_3O_4 nanoparticles with stable dispersion were prepared by L- lysine modified chemical coprecipitation method, and the surface of the nanoparticles was composed of amino groups, which were used for the catalytic reduction of p-nitrophenol and the adsorption of methylene blue, respectively. The amino group is complexed with Ag ~ (2 +) Cu _ (2) by complexation, and then chemical reduction is carried out. Ag/Cu@Fe_3O_4 nanoparticles were prepared by Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), energy dispersive X-ray diffraction (EDX) and vibrating sample magnetometer (VSM). The structure and magnetic properties of p-nitrophenol were characterized. The catalytic reduction of p-nitrophenol by Ag/Cu@Fe_3O_4 nanoparticles was also studied. The results show that ZnFe_2O_4/rGO nanomagnetic composites can be prepared by hydrothermal method with high efficiency and can be recycled under external magnetic field. The experimental results show that the mixed solvent of water and ethylene glycol at 180 鈩，

本文編號(hào)：1636626