Efficient removal of organic and bacterial pollutants by Ag-La0.8Ca0.2Fe0.94O3-δ perovskite via catalytic peroxymonosulfate activation
MetadataShow full item record
© 2018 Elsevier B.V. Removal of toxic organics and bacterial disinfection are important tasks in wastewater treatment. Most heavy metal-based catalysts for degradation of aqueous organic pollutants in heterogeneous Fenton-like processes suffer from the toxicity of leached metals. The present work reports environmentally benign systems for both degradation of organics and bacterial disinfection. Calcium substituted LaFeO 3- d perovskite was demonstrated as an efficient catalyst to activate peroxymonosulfate (PMS) for degradation of phenol, methylene blue and rhodamine 6 G. Compared to LaFeO 3- d and nanocrystal Fe 3 O 4 , the lattice oxygen vacancies in B-site cation-deficient perovskite of La 0.8 Ca 0.2 Fe 0.94 O 3 - d (LaCaFeO 3- d ) particles renders this material a greatly improved catalytic performance. Electron paramagnetic resonance (EPR) suggested that both sulfate (SO 4 [rad]–) and hydroxyl radicals ([rad] OH) played critical roles in the advanced oxidation processes. Moreover, silver doped perovskite (Ag-LaCaFeO 3- d )/PMS successfully inhibited the growth of waterborne pathogen Escherichia coli and Methicillin-resistant Staphylococcus aureus (MRSA) at a lower dose than silver ions, proving a synergetic effect between free radicals and Ag + in killing the bacteria. Therefore, Ag-LaCaFeO 3- d /PMS would be promising for practical wastewater treatment.
Showing items related by title, author, creator and subject.
Zhang, C.; Zhang, S.; Miao, X.; Hu, Y.; Staaden, L.; Jia, Guohua (2017)Organic-inorganic hybrid perovskites have attracted extensive interest in recent years due to their remarkable properties in highly efficient solar cells. The quality of the perovskite thin films has been identified as a ...
Simultaneous enhancement in stability and efficiency of low-temperature processed perovskite solar cellsMahmud, M.; Elumalai, Naveen Kumar; Upama, M.; Wang, D.; Wright, M.; Sun, T.; Xu, C.; Haque, F.; Uddin, A. (2016)Mixed ion based perovskite solar cells (PSCs) have recently emerged as a promising photoactive material owing to their augmented electronic and light harvesting properties combined with stability enhancing characteristics. ...
Low temperature processed ZnO thin film as electron transport layer for efficient perovskite solar cellsMahmud, M.; Elumalai, Naveen Kumar; Upama, M.; Wang, D.; Chan, K.; Wright, M.; Xu, C.; Haque, F.; Uddin, A. (2017)Organic inorganic lead halide Perovskite photovoltaic devices are promising candidates for commercial application because of their high efficiency and low production cost. One integral part of these high efficiency solar ...