Purification of wastewater by the piezo-catalyst effect of PbTiO3 nanostructures under ultrasonic vibration

Amiri, Omid; Salar, Khatra; Othman, Parwarda; Rasul, Tawar; Faiq, Dlnya; Saadat, M.

doi:10.1016/j.jhazmat.2020.122514

Cited by 92 publications

(19 citation statements)

References 54 publications

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“…For LaMnO 3, LaFeO 3, LaCoO 3 , and LaNiO 3 , the isotherms obtained are of type IV with a hysteresis loop of type H2(b) according to IUPAC classification [51] corresponding to mesoporous materials. The specific surface area ranged from 7 m 2 /g for LaCoO 3 to 14 m 2 /g for LaFeO 3 , which is a similar range to several perovskites in the literature [50,52] although there are also cases where synthesized perovskites display specific surface areas in the order of 60-120 m 2 /g [53,54], while the respective pore diameters were 18.4 Å and 88.9 Å. On the other hand, LaCuO 3 and LaNiO 3 -800 materials appear as non-porous and adsorption-desorption isotherms are of type II with H2(b) type hysteresis loop.…”

Section: Characterization Of Lamosupporting

confidence: 67%

Heterogeneous Activation of Persulfate by LaMO3 (M=Co, Fe, Cu, Mn, Ni) Perovskite Catalysts for the Degradation of Organic Compounds

et al. 2022

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Sulfate radical-based advanced oxidation processes (SR-AOPs) are lately applied for the degradation of various pollutants through the formation of reactive oxidant species (ROS) from activation of oxidants, such as persulfate (PS) or peroxymonosulfate (PMS). In this study, LaMO3 (M=Co, Fe, Cu, Mn, Ni) perovskite catalysts were synthesized, characterized by several techniques, and tested for the activation of persulfate towards the degradation of phenolic pollutants. The effect of substitution of position B of La-based perovskites as well as calcination temperature was studied. Overall, the results showed that the decisive role in the catalytic activity was the presence of structures that enhance the transfer of electrons between perovskite and oxidant. LaNiO3 followed by LaCoO3 were found as the most active catalysts. Finally, the stability of the catalysts was studied, showing that B-metal leaching is significant for both catalysts, with LaCoO3 being the most stable one.

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Section: Characterization Of Lamosupporting

confidence: 67%

Heterogeneous Activation of Persulfate by LaMO3 (M=Co, Fe, Cu, Mn, Ni) Perovskite Catalysts for the Degradation of Organic Compounds

et al. 2022

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“…Notably, the generated radicals by piezocatalytic PTFE include the •OH, •O 2 − , 1 O 2 , and •H, which are among the strongest aqueous redox species that have utility in a range of biological, chemical, and environmental applications. For example, piezocatalysis has been utilized in wastewater purification as mechanical vibration that drives the piezocatalysis is a green energy resource 43 – 46 . The piezocatalytic decomposition of methyl orange (MO) dye as a function of time during ultrasound irradiation of PTFE electret particles is displayed in Fig.…”

Section: Resultsmentioning

confidence: 99%

Ultrasonic activation of inert poly(tetrafluoroethylene) enables piezocatalytic generation of reactive oxygen species

et al. 2021

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Controlled generation of reactive oxygen species (ROS) is essential in biological, chemical, and environmental fields, and piezoelectric catalysis is an emerging method to generate ROS, especially in sonodynamic therapy due to its high tissue penetrability, directed orientation, and ability to trigger in situ ROS generation. However, due to the low piezoelectric coefficient, and environmental safety and chemical stability concerns of current piezoelectric ROS catalysts, novel piezoelectric materials are urgently needed. Here, we demonstrate a method to induce polarization of inert poly(tetrafluoroethylene) (PTFE) particles (<d > ~ 1–5 μm) into piezoelectric electrets with a mild and convenient ultrasound process. Continued ultrasonic irradiation of the PTFE electrets generates ROS including hydroxyl radicals (•OH), superoxide (•O2−) and singlet oxygen (1O2) at rates significantly faster than previously reported piezoelectric catalysts. In summary, ultrasonic activation of inert PTFE particles is a simple method to induce permanent PTFE polarization and to piezocatalytically generate aqueous ROS that is desirable in a wide-range of applications from environmental pollution control to biomedical therapy.

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“…4 c, which also indicates a strong linear relationship between the ln (C 0 /C) and the time of exposure. The straight-line slope reflects the kinetic constant (0.02239 min -1 ) 32,33 . However, the piezoelectric coefficient (d 33 ) of the BTMO can reach up to 280 pC/N with electrical poling in the parallel direction.…”

Section: Piezocatalytic Performance Of Ba 2 Timnomentioning

confidence: 99%

Ba₂TiMnO₆ two-dimensional nanosheets for rhodamine B organic contaminant degradation using ultrasonic vibrations

2021

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Purification of wastewater by the piezo-catalyst effect of PbTiO3 nanostructures under ultrasonic vibration

Cited by 92 publications

References 54 publications

Heterogeneous Activation of Persulfate by LaMO3 (M=Co, Fe, Cu, Mn, Ni) Perovskite Catalysts for the Degradation of Organic Compounds

Heterogeneous Activation of Persulfate by LaMO3 (M=Co, Fe, Cu, Mn, Ni) Perovskite Catalysts for the Degradation of Organic Compounds

Ultrasonic activation of inert poly(tetrafluoroethylene) enables piezocatalytic generation of reactive oxygen species

Ba₂TiMnO₆ two-dimensional nanosheets for rhodamine B organic contaminant degradation using ultrasonic vibrations

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Purification of wastewater by the piezo-catalyst effect of PbTiO3 nanostructures under ultrasonic vibration

Cited by 92 publications

References 54 publications

Heterogeneous Activation of Persulfate by LaMO3 (M=Co, Fe, Cu, Mn, Ni) Perovskite Catalysts for the Degradation of Organic Compounds

Heterogeneous Activation of Persulfate by LaMO3 (M=Co, Fe, Cu, Mn, Ni) Perovskite Catalysts for the Degradation of Organic Compounds

Ultrasonic activation of inert poly(tetrafluoroethylene) enables piezocatalytic generation of reactive oxygen species

Ba2TiMnO6 two-dimensional nanosheets for rhodamine B organic contaminant degradation using ultrasonic vibrations

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Ba₂TiMnO₆ two-dimensional nanosheets for rhodamine B organic contaminant degradation using ultrasonic vibrations