Abstract

A novel sol–gel method has been adopted to synthesize the cubic structure of CoFe₂O₄ microspheres (CFOM) with JCPDs card no. 22-1086 and polyacrylamide decorated CoFe₂O₄ microspheres (p-CFOM). The crystal structure, functional group, surface morphology, light absorption capacity, magnetic, photoluminescence and electrochemical properties and photocatalytic activity of CFOM and p-CFOM for the photocatalytic degradation of Congo red (CR) dye have been systematically discussed. The polyacrylamide introduced to the CFOM obviously enhance the light absorption capacity, squareness ratio, photoluminescence properties and charge transfer and separation efficiency. Based on the light absorption, electrochemical measurement and photocatalytic experiments, the p-CFOM possess a higher photocatalytic activity in photocatalytic degradation of CR dye than CFOM. The light absorption capacity, charge transfer and separation efficiency, and photocatalytic experiments of p-CFOM indicated that the polyacrylamide is a linear polymer as a potential electron collector play a key role to restrain charge carrier recombination. Compared with previous reports, some new properties of AFe₂O₄ could be obtained for different A site metal ions.

中文翻译：

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钴铁氧体和聚丙烯酰胺修饰的钴铁氧体微球在结构，光学，磁性，光致发光和光催化性能方面的比较研究

摘要

已经采用一种新颖的溶胶-凝胶方法，用JCPDs卡号11合成了CoFe ₂ O ₄微球（CFOM）的立方结构。22-1086和聚丙烯酰胺装饰的CoFe ₂ O ₄微球（p-CFOM）。系统地讨论了CFOM和p-CFOM的晶体结构，官能团，表面形貌，光吸收能力，磁性，光致发光和电化学性能以及光催化活性对刚果红（CR）染料的光催化降解。引入CFOM的聚丙烯酰胺明显提高了光吸收能力，矩形比，光致发光性能以及电荷转移和分离效率。根据光吸收，电化学测量和光催化实验，p-CFOM在CR染料的光催化降解方面比CFOM具有更高的光催化活性。光吸收能力，电荷转移和分离效率，p-CFOM的光催化实验表明，聚丙烯酰胺是一种线型聚合物，其潜在的电子捕集剂在抑制电荷载流子复合中起关键作用。与以前的报告相比，AFe的一些新特性对于不同的A位金属离子，可以得到₂ O ₄。