E3S Web Conf.
Volume 267, 20217th International Conference on Energy Science and Chemical Engineering (ICESCE 2021)
|Number of page(s)||5|
|Section||Environmental Chemistry Research and Chemical Preparation Process|
|Published online||04 June 2021|
Synthesis of flower-like CoOOH with hierarchical micro/nano-structure as a catalyst for peroxymonosulfate activation
(School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, P.R. China)
* Corresponding author. Tel.: +86 23 62563221. E-mail address: email@example.com (G. Li)
In this work, hierarchical flower-like CoOOH assembled from many nanoflakes with a thickness of 20 nm was fabricated by a simple chemical bath deposition (CBD) method, and its performance as a heterogenous catalyst to activate peroxymonosulfate (PMS) for degradation of methylene blue (MB) solution was explored. The results show that CoOOH/PMS is a high efficient system for MB removal, in which 91.95% degradation of MB can be realized within 25 min. Influences of process parameters, including dosage of PMS, addition of catalyst, and co-existed anions on MB degradation were also investigated. It is found that the degradation rate of MB increases with the increase of the amount of PMS from 0.15 mmol·L-1 to 0.45 mmol·L-1. In such PMS concentrations ranges, CoOOH catalyst amount of 0.03 g·L-1 is adequate for PMS activation in the reaction system. The presence of Cl-1and HCO3- anions has a negative effect on MB degradation, while SO42- has no significant influence. In addition, quenching experiments were conducted and SO4 ·- is confirmed as the main active specie during the MB degradation process. Moreover, cycling runs proven that CoOOH could be re-used to activate PMS for MB degradation without notable activity reduction. These results suggest that hierarchical CoOOH is a promising PMS activator for organic pollutant removal.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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