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https://hdl.handle.net/2440/125721
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Type: | Journal article |
Title: | Postsynthesis oxygen nonstoichiometric regulation: a new strategy for performance enhancement of perovskites in advanced oxidation |
Author: | Miao, J. Li, J. Dai, J. Guan, D. Zhou, C. Zhou, W. Duan, X. Wang, S. Shao, Z. |
Citation: | Industrial and Engineering Chemistry Research, 2020; 59(1):99-109 |
Publisher: | American Chemical Society |
Issue Date: | 2020 |
ISSN: | 0888-5885 1520-5045 |
Statement of Responsibility: | Jie Miao, Jiang Li, Jie Dai, Daqin Guan, Chuan Zhou, Wei Zhou, Xiaoguang Duan, Shaobin Wang, and Zongping Shao |
Abstract: | Due to their flexible physiochemical properties and defect-rich structures, perovskite oxides have drawn increasing attention as efficient heterogeneous catalysts for peroxymonosulfate (PMS) activation in wastewater remediation. Herein, we reported a new nondoping strategy of postsynthesis oxygen nonstoichiometric regulation for LaMnO₃₊δ (LMO) at various oxygen partial pressures and calcination temperatures, named as LMO-P-T, to control its interstitial oxygen defect content, resulting in the enhancement of its catalytic activity and stability for degradation of rhodamine B (RhB). The defect structure, charge-transfer capacity, and resistance against metal leaching of LMO were thus improved. Specifically, LMO-5 bar-600 with the highest defect content presented excellent Fenton-like activity, 1.76 times that of LMO. Favorable singlet oxygen was confirmed as the dominant reactive species in the LMO-5 bar-600/PMS system, and the obtained catalysts showed satisfactory activity in a wide initial pH range. This work might provide a universal approach in designing metal oxides catalysts for efficient advanced oxidation. |
Rights: | © 2019 American Chemical Society |
DOI: | 10.1021/acs.iecr.9b05550 |
Published version: | http://dx.doi.org/10.1021/acs.iecr.9b05550 |
Appears in Collections: | Aurora harvest 4 Chemical Engineering publications |
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