Enhancement strategies for efficient activation of persulfate by heterogeneous cobalt-containing catalysts: A review. (March 2022)

• Record Type: Journal Article
• Authors: Li, Bo; Wang, Yun-Fei; Zhang, Lu; Xu, Huan-Yan
• Is Part Of: Chemosphere. Volume 291:Part 2(2022)
• Publication Date: 2022-03
• Subjects: SR-AOPs -- Cobalt-containing catalysts -- Persulfate -- Wastewater treatment -- Enhancement strategies; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2021.132954
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: As a clean and efficient technology for the degradation of organic contaminants, sulfate radical based advanced oxidation processes (SR-AOPs) have attracted more and more attention in the past decades. Cobalt is regarded as the most reactive and efficient non-noble metal catalyst for the activation of persulfate including peroxymonosulfate (PMS) and peroxydisulfate (PDS) to produce sulfate radicals. Due to the limitations of homogeneous catalytic systems, the heterogeneous cobalt-containing catalysts have been emerged and rapidly developed. Various strategies have been schemed to further enhance the activation ability of persulfate by heterogeneous cobalt-containing catalysts. This paper provides an overview on the recent progress in enhancement strategies for the highly efficient activation of persulfate by heterogeneous cobalt-containing catalysts. With a brief introduction on the chemistry and feature of sulfate radical reactions catalyzed by homogeneous Co 2+ /Co 3+ species, the main strategies for enhancing persulfate activation by heterogeneous cobalt-containing catalysts are summarized, such as surface and morphology design, multiple reactive centers design, organic-inorganic hybrids and heterostructure composites. Future perspectives of heterogeneous SR-AOPs systems catalyzed by cobalt-containing catalysts are outlined. Graphical abstract: Image 1 Highlights: Enhancement strategies for persulfate activation are generalized and summarized. The potential mechanisms of heterogenous cobalt-containing catalysts are discussed. A future blueprint for the heterogeneous cobalt-containing catalysts is described.