Preparation of cobalt ferrite nanoparticles using fulvic acid as a capping agent and its effect on catalytic activity

• 作者: Abdelrahman ABadawy Guanben DU Hisham AEssawy Jinxing LI Xiaojian ZHOU
• 来源期刊: 材料科学与应用(英文)
• 学科: 化学
• 关键词: NANOSTRUCTURED materials PRECIPITATION OXIDATION X-RAY DIFFRACTION
• 年，卷（期）: 2019,（2）
• 页码范围: 48-54
• 页数: 7页
• 分类号: O64

摘要

Cobalt ferrite was prepared by co-precipitation from cobalt and iron soluble precursors in presence of fulvic acid at different pHvalues, namely, 6 and 8 and compared with the same preparation in absence of fulvic acid. The presence of fulvic acid is expected tobind metal ions through bridging before co-precipitation and mineralization. The extent of binding is determined according to thepH of the process. This influences the mineralization of the resulting cobalt ferrite and the crystallization/ordering of its lattice. Inaddition, the extent of residual ferric oxide is also a function of the efficiency of binding process. This route of modification for the coprecipitationprocess was found to be accompanied by enhanced surface area and total pore volume for most of the prepared samples.The involvement of these oxides as catalysts in the photo-catalytic degradation of phenol from wastewater was found to contributevery efficiently and the removal reached about 88% in some cases, which can be attributed to olation and oxolation process of theformed nanoparticles.