A magnetic-void-porous MnFe2O4/carbon microspheres nano-catalyst for catalytic ozonation: Preparation, performance and mechanism

• DOI: 10.1016/j.ese.2021.100110
• Publication Date: 2021-07-27T16:20:34Z
• Authors: Xiaoguang Jin; Changyong Wu; Xiangmiao Tian; Panxin Wang; Yuexi Zhou; Jiane Zuo
• Keywords: Nanomaterial-based catalyst; Oxalic Acid; Carbon fibers

Wastewater treatment is essential to guarantee human health and ecological security. Catalytic ozonation with nanocatalysts a widely studied efficient technology. However, this method has always been limited by disadvantages such as easily loss, difficult separate reuse, catalytic ability decay caused aggregation, which could cause severe resources waste potential risk ecosystem. To remedy these challenges, magnetic-void-porous MnFe2O4/carbon microsphere shell nanocatalyst (CMS-MnFe2O4) was successfully synthesized using renewable natural microalgae. The separation test showed CMS-MnFe2O4 rapidly separated within 2 min under an external magnetic field. In of oxalic acid (OA), stable efficiency, reaching maximum total organic carbon removal efficiency 96.59 % maintained 93.88 after 4 cycles. due the supporting effects shell, significantly enhanced chemical stability reduced metal ions leaching 10-20 MnFe2O4 through electron transfer. explore mechanism, radical experiments were conducted new degradation pathway OA involving superoxide anions rather than hydroxyl radicals proposed. Consequently, study suggests that efficient, recyclable, stable, durable catalyst for be prepared.