Development of 3-dimensional Co3O4 catalysts with various morphologies for activation of Oxone to degrade 5-sulfosalicylic acid in water

Mei-Hsuan Li; Wen Da Oh; Kun-Yi Andrew Lin; Ching Hung; Chechia Hu; Yunchen Du

doi:10.1016/j.scitotenv.2020.138032

Development of 3-dimensional Co₃O₄ catalysts with various morphologies for activation of Oxone to degrade 5-sulfosalicylic acid in water

Sci Total Environ. 2020 Jul 1:724:138032. doi: 10.1016/j.scitotenv.2020.138032. Epub 2020 Mar 20.

Authors

Mei-Hsuan Li¹, Wen Da Oh², Kun-Yi Andrew Lin³, Ching Hung⁴, Chechia Hu⁵, Yunchen Du⁶

Affiliations

¹ Department of Environmental Engineering, Innovation and Development Center of Sustainable Agriculture, Research Center of Sustainable Energy and Nanotechnology, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung, Taiwan.
² School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia.
³ Department of Environmental Engineering, Innovation and Development Center of Sustainable Agriculture, Research Center of Sustainable Energy and Nanotechnology, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung, Taiwan. Electronic address: linky@nchu.edu.tw.
⁴ Department of Civil Engineering, National Cheng Kung University, Tainan City, Taiwan.
⁵ Department of Chemical Engineering, R&D Center for Membrane Technology, Chung Yuan Christian University, Chungli Dist., Taoyuan City 32023, Taiwan. Electronic address: chechiahu@cycu.edu.tw.
⁶ School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China. Electronic address: yunchendu@hit.edu.cn.

PMID: 32408427
DOI: 10.1016/j.scitotenv.2020.138032

Abstract

Since 5-sulfosalicylic acid (SFA) has been increasingly released to the environment, SO₄^--based oxidation processes using Oxone have been considered as useful methods to eliminate SFA. As Co₃O₄ has been a promising material for OX activation, the four 3D Co₃O₄ catalysts with distinct morphologies, including Co₃O₄-C (with cubes), Co₃O₄-P (with plates), Co₃O₄-N (with needles) and Co₃O₄-F (with floral structures), are fabricated for activating OX to degrade SFA. In particular, Co₃O₄-F not only exhibits the highest surface area but also possesses the abundant Co²⁺ and more reactive surface, making Co₃O₄-F the most advantageous 3D Co₃O₄ catalyst for OX activation to degrade SFA. The mechanism of SFA by this 3D Co₃O₄/OX is also investigated and the corresponding SFA degradation pathway has been elucidated. The catalytic activities of Co₃O₄ catalysts can be correlated to physical and chemical properties which were associated with particular morphologies to provide insights into design of 3D Co₃O₄-based catalysts for OX-based technology to degrade emerging contaminants, such as SFA.

Keywords: 3D catalysts; 5-Sulfosalicylic acid; Co(3)O(4); Oxone.