磁性荧光ZnS复合粒子的制备及其吸附性能的研究

发布时间：2018-03-18 12:42

本文选题：磁流体　切入点：吸附　出处：《辽宁大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着时代的发展,具有磁性荧光双功能性能的复合材料在各个领域有着很大的应用潜力。本文首先利用乳液聚合和热分解方法成功的合成了具有磁性荧光双功能的复合粒子α/ZnS和β/ZnS(α为Fe_3O_4-OA/PMMA/P(StNVP)磁性聚合物),β为Fe_3O_4-SC/Si O_2/P(StNVP)磁性聚合物),上述制备的磁性荧光复合粒子通过IR、XRD和粒度分析仪等一系列进行表征。结果表明,复合粒子α/ZnS和β/ZnS具有良好的磁性和荧光性,并且平均粒径分别为593.6 nm和670.5 nm。将上述制备的α/ZnS和β/ZnS复合粒子在N_2保护下,分别于管式炉中高温炭化得到两种不同的磁性荧光碳球C_α/ZnS和C_β/ZnS,通过IR、XRD和氮气吸附等一系列表征,C_α/ZnS和C_β/ZnS的平均粒径分别为556.9 nm和596.4 nm;并且分别研究了磁性荧光碳球C_α/ZnS和C_β/ZnS对Cu~(2+)、Ni~(2+)、Co~(2+)、Hg~(2+)、Pb~(2+)和苯酚的吸附能力,考察了接触时间与温度对吸附的影响;用准一级和准二级反应方程进行拟合了磁性荧光碳球对Cu~(2+)、Hg~(2+)和苯酚吸附动力学,结果显示符合二级动力学模型。利用荧光光谱法分析Cu~(2+)和Hg~(2+)对磁性荧光碳球C_α/ZnS和C_β/ZnS荧光猝灭的关系。结果显示:Cu~(2+)和Hg~(2+)浓度在40-120 mg/L之间,加入0.01g的磁性荧光碳球,C_α/ZnS或C_β/ZnS荧光强度之差(F_0-F)与Cu~(2+)和Hg~(2+)浓度有着良好的线性关系。此方法C_α/ZnS和C_β/ZnS检测Cu~(2+)浓度检出限分别为2.75 mg/L和5.53 mg/L;检测Hg~(2+)浓度检出限分别为3.92mg/L和4.36 mg/L。
[Abstract]:With the development of the times, The composite materials with magnetic fluorescence bifunctional properties have great application potential in various fields. Firstly, the composite particles 伪 / ZnS and 尾 / ZnS (伪) with magnetic fluorescence bifunctional have been successfully synthesized by emulsion polymerization and thermal decomposition. For Fe3O4-OAP / PMMA / Fe_3O_4-SC/Si / P / P / P / P / P / P / P, the magnetic polymer, Fe_3O_4-SC/Si O / P / P / P / P, the magnetic fluorescent composite particles were characterized by a series of IR XRD and particle size analyser. The results show that, The composite particles 伪 / ZnS and 尾 / ZnS have good magnetic and fluorescence properties, and the average particle sizes are 593.6 nm and 670.5 nm respectively. Two different magnetic fluorescent carbon spheres, C伪 / ZnS and C尾 / ZnS, were obtained by carbonization at high temperature in a tube furnace. The average particle sizes of C伪 / ZnS and C尾 / ZnS were 556.9 nm and 596.4 nm, respectively, by IR XRD and nitrogen adsorption. The adsorption ability of C _ 伪 / ZnS and C _ 尾 / ZnS for Cu~(2 and Phenol. The effects of contact time and temperature on adsorption were investigated, and the adsorption kinetics of Cu~(2 and phenol were fitted by quasi first order and quasi second order reaction equations. The results showed that the fluorescence quenching of C _ 伪 / Zn _ S and C _ 尾 / Zn _ S on magnetic carbon spheres was studied by fluorescence spectroscopy. The results showed that the concentration of C _ 伪 / Zn _ S and C _ 尾 / ZnS was between 40 and 120 mg/L, and the results showed that the fluorescence quenching of C _ 伪 / Zn _ S and C _ 尾 / ZnS was between 40 and 120 mg/L. There is a good linear relationship between the concentration of C _ 伪 / ZnS or C _ 尾 / ZnS fluorescence intensity and the concentration of Cu~(2) and Hg~(2). The detection limits of C _ 伪 / ZnS and C _ 尾 / ZnS for Cu~(2) are 2.75 mg/L and 5.53 mg / L; the detection limits of Hg~(2) are 3.92 mg / L and 4.36 mg / L, respectively.
【学位授予单位】：辽宁大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB33;O647.3

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