用于催化降解偶氮染料的蛋白质纤维铁配合物的制备与性能

发布时间：2018-01-06 17:25

本文关键词：用于催化降解偶氮染料的蛋白质纤维铁配合物的制备与性能　出处：《天津工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：本文首先选择了三种不同直径和鳞片结构的羊毛纤维分别与Fe~(3+)离子进行配位反应并得到羊毛纤维铁配合物,考察了不同反应条件对其配位反应的影响,重点研究和比较了羊毛纤维的平均直径以及鳞片结构对其Fe~(3+)离子配位反应性能的影响。并采用扫描电镜(SEM)、傅立叶红外光谱(FTIR)、X射线衍射法(XRD)、X射线光电子能谱(XPS)和紫外可见漫反射光谱(DRS)等技术对其铁配合物的表面形貌、化学结构和光吸收性能等方面进行了表征。然后将三种羊毛纤维铁配合物分别作为非均相光Fenton反应催化剂应用于偶氮染料活性红195的氧化降解反应中,深入探究了反应体系中配合物表面Fe~(3+)离子含量、H202浓度、无机盐和辐射光强度等因素对配合物催化活性的影响作用。评估了羊毛纤维的平均直径以及鳞片结构与其配合物催化活性之间的关系。最后还比较了蚕丝纤维和羊毛纤维与Fe~(3+)离子的配位反应性能以及所形成配合物的催化降解性能。结果表明,具有不同直径和表面结构的三种羊毛纤维均能够与Fe~(3+)离子发生配位反应形成羊毛纤维铁配合物,增加Fe~(3+)离子浓度或升高反应温度均有利于配合物的Fe~(3+)离子配合量的提高。在相同反应条件下,鳞片厚度较小的羊毛纤维更易于与Fe~(3+)离子发生配位反应。羊毛纤维铁配合物能够作为非均相Fenton反应催化剂对偶氮染料的氧化降解反应具有明显的催化作用,配合物Fe~(3+)离子配合量的提高和可见光的引入均可显著促进其的化活性。相同反应条件下,直径较小的羊毛纤维铁配合物显示出更好的催化降解性能越。染色羊毛纤维与Fe~(3+)离子的配位反应性能有所降低,但其配合物仍然具有良好的催化降解性能。尽管蚕丝较难与Fe3离子发生配位反应,但是在相同条件下,蚕丝纤维铁配合物却比羊毛铁配合物显示出更优良的光催化降解性能。
[Abstract]:In this paper, three kinds of wool fibers with different diameters and scales were selected to coordinate with Fe~(3 ions and the iron complexes of wool fibers were obtained. The effects of different reaction conditions on the coordination reaction were investigated. The effects of the average diameter of wool fiber and the scale structure on the ionic coordination reaction of wool fiber were studied and compared. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-Vis diffuse reflectance spectroscopy (DRS) were used to characterize the surface morphology of the iron complexes. The chemical structure and photoabsorption properties were characterized. Then, three kinds of wool fiber iron complexes were used as heterogeneous photocatalysts for the oxidative degradation of azo dye reactive red 195. In response. The concentration of H202 on the surface of Fe~(3 in the reaction system was studied. The effects of inorganic salts and radiation intensity on the catalytic activity of the complex were evaluated. The relationship between the average diameter of wool fiber and the scale structure and the catalytic activity of the complex was evaluated. Wool fiber and Feo (. 3) the coordination reaction of ions and the catalytic degradation of the complexes. Three wool fibers with different diameters and surface structures can coordinate with Fe~(3) ions to form wool fiber iron complexes. Increasing the concentration of Fe~(3) ions or increasing the reaction temperature can improve the coordination amount of Fe~(3) ions of the complexes under the same reaction conditions. The wool fiber with smaller scale thickness is more easily associated with Fe~(3). The wool fiber iron complex can be used as heterogeneous Fenton catalyst for the oxidative degradation of azo dyes. The increase of the coordination amount of Fe~(3 ion and the introduction of visible light can significantly promote the chemical activity of the complex under the same reaction conditions. The iron complexes of wool fibers with smaller diameters showed better catalytic degradation, and the coordination reaction between wool fibers and Fe~(3) ions decreased. Although it is difficult for silk to coordinate with Fe3 ions, the complex still has good catalytic degradation performance under the same conditions. Silk fiber iron complex showed better photocatalytic degradation than wool iron complex.
【学位授予单位】：天津工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O643.36;X788

【参考文献】