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Hollow and oval-configured ultrafine Co3O4 as a highly-efficient activator of monopersulfate for catalytic elimination of Azorubin S

Khiem Department of Environmental Engineering, National Chung Hsing University, Taichung, 402, Taiwan|
Kun-Yi Andrew (57283813300) | Chechia (15135454000); Lin Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung, 402, Taiwan| Jet-Chau (57735668200); Hu Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei City, 106, Taiwan| Venkata Subbaiah (35620989900); Wen Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, Douliu, 640, Taiwan| Yiu Fai (22954605700); Munagapati Research Center for Soil & Water Resources and Natural Disaster Prevention, National Yunlin University of Science and Technology, Douliu, 640, Taiwan| Bui Xuan (57990700800); Tsang Department of Science and Environmental Studies, The Education University of Hong Kong, New Territories, Hong Kong| Eilhann (57990603000); Thanh Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology, Ho Chi Minh City, 700000, Viet Nam| Duong Dinh (57202424789); Kwon Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul, 222, South Korea| Ta Cong (57224854414); Tuan International School, Thai Nguyen University, Thai Nguyen, 250000, Viet Nam|

Sustainable Environment Research Số 1, năm 2022 (Tập 32, trang -)

ISSN: 24682039

ISSN: 24682039

DOI: 10.1186/s42834-022-00158-3

Tài liệu thuộc danh mục:



Từ khóa: Azo dyes; Catalysts; Cobalt compounds; Organometallics; Physicochemical properties; Reaction kinetics; Azo-dyes; Azorubin S; Catalytic elimination; Conventional treatments; Hollow; Industrial activities; Monopersulphate; Ultra-fines; Ultrafine; ]+ catalyst; Chemical activation
Tóm tắt tiếng anh
Azorubin S (ARS) represents one of the most common and frequently-utilized toxic azo dyes produced from industrial activities. While various conventional treatment techniques could not effectively eliminate ARS from water, heterogeneous metal-based catalyst coupled with monopersulfate (MPS) is a highly-efficient process for eliminating ARS, in which tricobalt tetroxide (Co3O4) has been attracted increasing attention as a preeminent MPS activator due to its outstanding physicochemical properties. However, the nanoscale Co3O4 particles usually pose a limitation of serious agglomeration in the aqueous environment, thus lowering their efficiency. Thus, developing an easy-synthesized and exceptionally efficient Co3O4-based catalyst is crucially paramount. Therefore, in this work, a special hollow-structured oval-like cobalt oxide (abbreviated as HOCO) was successfully constructed using Co-metal organic framework as a precursor, which was then utilized for catalyzing activation of MPS to degrade ARS. This as-obtained HOCO exhibited distinct physicochemical characteristics from commercially-available Co3O4, which subsequently resulted in superior activities for MPS activation in ARS degradation. Specifically, 100% of ARS could be degraded in 30 min with a corresponding reaction kinetic of 0.22 min− 1 by HOCO + MPS system. SO4•– radicals were validated to be primary reactive species for ARS degradation while the degradation pathway of ARS was also elucidated. This study further provides insightful information about the development of novel hollow-structured Co3O4-based catalyst for catalyzing activation of MPS to remove toxic dyes from water. © 2022, The Author(s).

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