Fabrication of perovskite lanthanum orthoferrite as a photocatalyst for controlled atom transfer radical polymerization of methacrylate monomers toward an electrolyte material for lead acid batteries

H. Le, H. Nguyen, T. Vo, T. Nguyen, M. Michalak, T. H. Luu
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Abstract

: Lanthanum orthoferrite (LaFeO 3 ) photocatalysts were synthesized by a facile and cost-effective co-precipitation method via the hydrolysis of La (III) and Fe (III). The characteristics of LaFeO 3 were investigated through thermogravimetric analysis (TGA), X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), vibrating sample magnetometry (VSM), and transmission electron microscopy (TEM). During the investigation of the applicability of LaFeO 3 as a photocatalyst for the atom transfer radical polymerization (ATRP) of methyl methacrylate monomer under UV irradiation, the obtained poly(methyl methacrylate) exhibited a high molecular weight and narrow polydispersity index. In addition, the LaFeO 3 can be recovered via application of a magnetic field and reused for the atom transfer radical polymerization process.
钙钛矿型正铁氧体镧作为甲基丙烯酸酯单体可控原子转移自由基聚合光催化剂制备铅酸电池电解质材料
通过La (III)和Fe (III)的水解,采用简便、经济的共沉淀法合成了镧-正铁氧体(LaFeO 3)光催化剂。通过热重分析(TGA)、x射线衍射(XRD)、紫外-可见漫反射光谱(DRS)、振动样品磁强计(VSM)和透射电子显微镜(TEM)对LaFeO 3进行了表征。在紫外光照射下,对LaFeO 3作为甲基丙烯酸甲酯单体原子转移自由基聚合(ATRP)光催化剂的适用性进行了研究,得到的聚甲基丙烯酸甲酯具有较高的分子量和较窄的多分散指数。此外,LaFeO 3可以通过施加磁场回收,并在原子转移自由基聚合过程中重复使用。
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