三维微纳米氧化铁的制备及其在水处理中的应用研究

发布时间：2018-04-23 22:36

本文选题：花形 + α-Fe2O3　；参考：《中北大学》2015年硕士论文

【摘要】：随着经济的迅猛发展，纺织印染行业排放的染料废水和工业生产产生的重金属污染已经成为水体污染的主要来源。为了有效的解决染料废水和重金属对水体造成严重污染问题，研发一种水处理材料对于水资源的保护和水污染的治理具有重要的意义。α-Fe2O3是最稳定的铁氧化物，在水处理方面有潜在的应用，α-Fe2O3纳米材料的吸附能力主要是由于其高表面积和多孔结构。因此，制备不同形貌和高比表面积的α-Fe2O3引起人们的广泛关注。本课题首先采用高温液相法，通过不同反应体系获得三维微纳米氧化铁。然后，将其应用于水污染处理实验，考查其对铬离子和刚果红染料的吸附性能。（1）采用操作简单、经济环保的实验方法，在乙二醇溶剂内，2mL乙二胺为碱源，回流30min，获得尺寸约为1.5μm的花形α-Fe2O3。通过变量实验确定了产物形貌的主要影响因素是乙二胺用量、乙二醇用量和回流时间，此外得出了三维花形形貌的可能生长机制。在水处理实验中，花形α-Fe2O3对刚果红和Cr(VI)的最大吸附量达到212和14.7mg/g。将不同制备条件所得样品进行刚果红染料吸附对比，饱和吸附量分别达到为188、191.2、107.6和210.1mg/g。（2）在2.5g表面活性剂PV P辅助下，2.7g尿素为碱源，，回流6h，获得由多孔纳米片组装形成的、尺寸2-3μm的、新颖的花形α-Fe2O3。通过变量实验得出，产物形貌非常依赖PVP用量和回流时间。由于新颖花形α-Fe2O3的高表面积和多孔结构，其对刚果红和Cr(VI)的最大吸附量高到628.9和25.1mg/g。此外，两种吸附等温线符合Langmuir吸附模型。
[Abstract]:With the rapid development of economy, dyestuff wastewater from textile printing and dyeing industry and heavy metal pollution from industrial production have become the main source of water pollution. In order to effectively solve the problem of serious pollution caused by dyestuff wastewater and heavy metals, it is of great significance to develop a kind of water treatment material for the protection of water resources and the treatment of water pollution. 伪 -Fe _ 2O _ 3 is the most stable iron oxide. The adsorption ability of 伪 -Fe _ 2O _ 3 nanomaterials is mainly due to its high surface area and porous structure. Therefore, the preparation of 伪-Fe _ 2O _ 3 with different morphology and high specific surface area has attracted much attention. In this paper, three-dimensional micro-nano ferric oxide was obtained by high temperature liquid phase method in different reaction systems. Then, it was applied to water pollution treatment experiment to study the adsorption properties of chromium ion and Congo red dye. 1) A flower-shaped 伪 -Fe _ 2O _ 3 with the size of 1.5 渭 m was obtained by using simple operation, economical and environmental protection method, using 2 mL ethylenediamine as alkali source in ethylene glycol solvent and refluxing for 30 min. The main factors affecting the morphology of the product were determined by variable experiments: the amount of ethylenediamine, the amount of ethylene glycol and the reflux time. In addition, the possible growth mechanism of the three-dimensional flower morphology was obtained. In the experiment of water treatment, the maximum adsorption amounts of floral 伪 -Fe _ 2O _ 3 on Congo red and Cr-VI were 212 and 14.7 mg / g. The adsorption capacity of Congo red dye by different preparation conditions was up to 188191.2107.6 and 210.1 mg / g, respectively. A novel flower-shaped 伪 -Fe _ 2O _ 3 with the size of 2-3 渭 m was obtained by refluxing for 6 h with 2.5 g surfactant PVP as the base source and refluxing for 6 h. The results show that the morphology of the product is very dependent on the amount of PVP and the reflux time. Due to the high surface area and porous structure of novel floral 伪 -Fe _ 2O _ 3, the maximum adsorption amounts of Congo red and Cr-VI are up to 628.9 and 25.1 mg / g. In addition, the two isotherms fit the Langmuir adsorption model.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1

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