期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 59, 期 1, 页码 99-109出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.9b05550
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资金
- National Natural Science Foundation of China [21576135]
- Jiangsu Natural Science Foundation for Distinguished Young Scholars [BK20170043]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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+delta (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.
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