Wastewater flocculation substrate derived three-dimensional ordered macroporous Co single-atom catalyst for singlet oxygen-dominated peroxymonosulfate activation

Wastewater flocculation substrate derived three-dimensional ordered macroporous Co single-atom catalyst for singlet oxygen-dominated peroxymonosulfate activation

Applied Catalysis B: Environmental

10.1016/j.apcatb.2023.122886

https://doi.org/10.1016/j.apcatb.2023.122886

Xu Guo, Qicheng Zhang, Hongwei He, An Cai, Shibo Xi, Jiaqi Du, Fengbao Zhang, Xiaobin Fan, Wenchao Peng, Yang Li

19 May 2023

Guo, X., Zhang, Q., He, H., Cai, A., Xi, S., Du, J., Zhang, F., Fan, X., Peng, W., & Li, Y. (2023). Wastewater flocculation substrate derived three-dimensional ordered macroporous Co single-atom catalyst for singlet oxygen-dominated peroxymonosulfate activation. Applied Catalysis B: Environmental, 335, 122886. https://doi.org/10.1016/j.apcatb.2023.122886

Herein, wastewater flocculation substrate is used as a carbon source to prepare a three-dimensional ordered macroporous (3DOM) structure carbon-based catalyst with the Cosingle bondN4 coordination active sites (Co-NC-PS) through a hard-template strategy. Abundant single-atom Cosingle bondN4 active sites endow the Co-NC-PS with splendid performance in degrading organic pollutants by activating peroxymonosulfate (PMS). Experiment results show that the singlet oxygen (1O2) is the main reactive oxygen species (ROSs) for bisphenol A (BPA) degradation. The strong coordination of Co atoms with N atoms not merely avoids the leaching of Co and improves the stability of the catalyst but also establishes stable adsorption configuration and facilitates the generation of 1O2 proven by density functional theory (DFT) calculations. This study provides the design of efficient Co carbon-based catalysts in mint conditions with high stability for water treatment, as well as a new idea for the preparation of high-value-added products from the recycling of flocculated waste.

Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

This research / project is supported by the Agency for Science, Technology and Research (A*STAR) - Low Carbon Energy Research Finding Initiative (LCERFI01-0033 | U2102d2006)
Grant Reference no. : U2102d2006

https://oar.a-star.edu.sg/communities-collections/articles/22696

0926-3373

Institute of Sustainability for Chemicals, Energy and Environment