摘要
将偕胺肟改性PAN纤维与Fe(bpy)32+溶液进行反应制备非均相Fenton催化剂,使用UV-vis DRS吸收光谱对其光吸收特性进行研究,并将其应用于罗丹明B的降解反应过程中,分别考察了Fe(bpy)32+负载量及溶液pH值对染料脱色率的影响.结果表明:反应温度和溶液中Fe(bpy)32+浓度的增加均能够促进偕胺肟改性PAN纤维与Fe(bpy)32+之间的反应,所得催化剂在可见光区具有明显的吸收性能;偕胺肟基团能够通过配位作用改变Fe(bpy)32+的光化学性质,使得催化剂在可见光下具有较高的催化活性,而且其活性与Fe(bpy)32+负载量密切相关,当负载量为0.29 mmol/g时其催化活性最高;此外,溶液pH值的升高会导致其催化活性有所降低.
A fibrous heterogeneous Fenton catalyst is prepared by the reaction between amidoximated PAN fiber and aque-ous Fe（bpy）3^2＋ solution, and the light absorption property of which is studied by using UV-vis DRS adsorption spectra. Then the catalyst is applied for the degradation of Rhodamine B, and two factors affecting the degrada- tion including Fe （bpy）3^2＋ content and pH value are investigated with respect to the discoloration rate. The results indicate that increasing reaction temperature and Fe （bpy）3^2＋ concentration in solution could faciliate the reaction between amidoximated PAN fiber and Fe（bpy）3^2＋ solution, and the obtained catalyst exhibits an obvious absorp-tion in the visible region. The amidoxime groups could change the photochemistry properties of Fe （bpy）3^2＋ through coordiation effect, and in turn lead to the catalyst with high photocatalytie activity under visible light ir-radiation. Its photocatalytic activity depends highly upon the Fe （bpy）3^2＋ content, and the catalyst with 0.29 mmol/g of Fe （bpy）3^2＋ exhibites the highest activity. Moreover, its activity is reduced as the pH value increased.
出处
《天津工业大学学报》
CAS
北大核心
2012年第6期6-9,共4页
Journal of Tiangong University
