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

Manos, Donatos; Papadopoulou, Frederica; Margellou, Antigoni; Petrakis, Dimitrios; Konstantinou, Ioannis

doi:10.3390/catal12020187

Cited by 23 publications

(5 citation statements)

References 65 publications

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“…[164,165] Most of the time, calcination has a positive effect on their properties, while different calcination temperatures give rise to structurally different materials with varying specific surface areas, hence modified adsorption performances. [166,167] Studies suggest that calcination can improve material properties, but high calcination temperatures can lead to unwanted results. In 2D materials, high calcination temperatures cause the loss of the 2D structure and all the beneficial characteristics originating from it.…”

Section: Adsorptionmentioning

confidence: 99%

Ferromagnetic Elements in Two‐Dimensional Materials: 2D Magnets and Beyond

Papavasileiou,

Menelaou,

Sarkar

et al. 2023

Adv Funct Materials

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Ferromagnetism in 2D materials has attracted tremendous interest from the scientific community thanks to its potential for the design of magnetic materials with unique properties. The presence of a ferromagnetic element in a 2D material can improve the existing properties and offer new ones, giving rise to the development of manifold applications. This review focuses on recent advances and perspectives of 2D materials that bear at least one ferromagnetic element (iron, cobalt, nickel) as i) structural constituent, ii) dopant atom, or iii) adjacent atom through proximity effect. By describing in detail the magnetic properties that have emerged so far, their potential to form next‐generation 2D magnets is discussed. Moreover, the contribution of such 2D materials is analyzed in various applications (electrochemical, photochemical, optical, and electronic), aiming to explore further functionalities and capabilities of ferromagnetic elements, apart from their magnetic nature. Special attention is given to gadolinium and other rare earth elements that display a ferromagnetic order even at ultra‐low temperatures and form part of 2D structured materials, with particularly appealing properties deriving from their 4f electrons.

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Section: Adsorptionmentioning

confidence: 99%

Ferromagnetic Elements in Two‐Dimensional Materials: 2D Magnets and Beyond

Papavasileiou,

Menelaou,

Sarkar

et al. 2023

Adv Funct Materials

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“…The two prominent bands at 678 and 511 cm −1 correspond to La−O and Cu−O stretching modes of the orthorhombic La 2 CuO 4 phase [45] . For 100LCO catalyst, in addition to 678 and 511 cm −1 bands, the presence of bands at 593 cm −1 (related to Cu−O stretching mode) confirms the presence of CuO as an additional second phase because of the higher molar ratio of Cu to La (1 : 1) [46] . The FTIR spectrum of 2LCO, 5LCO and 10LCO [Figure S9] reveals a sharp band at 3609 cm −1 , which is attributed to the bulk hydroxyl groups originating from La(OH) 3 .…”

Section: Resultsmentioning

confidence: 77%

La−Cu based heterogeneous perovskite catalyst for highly selective benzene hydroxylation under mild conditions

Kumar

Jagtap

Gupta

et al. 2022

Chemistry An Asian Journal

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Direct hydroxylation of benzene towards phenol with high conversion and selectivity remains a great challenge. We report herein an efficient La2CuO4 perovskite catalyst for one‐step oxidation of benzene using hydrogen peroxide under mild conditions. The catalyst was characterized using XRD, TEM, XPS, TG‐DTA, and other advanced techniques. The one‐pot hydroxylation reaction carried out at 60 °C under optimum reaction conditions in the presence of catalytic material shows benzene to phenol transformation with 51% conversion with >99% selectivity with 65 percent peroxide efficiency, respectively. The influence of reaction conditions such as temperature, amount of oxidant, reaction time and mode of addition of the oxidant was crucial in selectivity optimization.

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“…The leaching concentration of Co ion was only 0.19 mg L −1 , significantly lower than those reported in the existing literature (Figure 1f). 27 reaction, Co@NCNT can be separated from the solution by simple magnetic manipulation (Figure 1g), effectively avoiding secondary pollution. All these results proved that Co@NCNT possessed superior catalytic performance, high recyclability, and strong stability in a wide pH range, exhibiting promising application in AOP wet scrubber.…”

Section: Catalytic Removal Of Chlorobenzene In Aop Wetmentioning

confidence: 99%

Deep Oxidation of Chlorinated VOCs by Efficient Catalytic Peroxide Activation over Nanoconfined Co@NCNT Catalysts

Xie,

Xiao,

Zhan

et al. 2024

Environ. Sci. Technol.

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The catalytic removal of chlorinated VOCs (CVOCs) in gas−solid reactions usually suffers from chlorine-containing byproduct formation and catalyst deactivation. AOP wet scrubber has recently attracted ever-increasing interest in VOC treatment due to its advantages of high efficiency and no gaseous byproduct emission. Herein, the lowvalence Co nanoparticles (NPs) confined in a N-doped carbon nanotube (Co@NCNT) were studied to activate peroxymonosulfate (PMS) for efficient CVOC removal in a wet scrubber. Co@NCNT exhibited unprecedented catalytic activity, recyclability, and low Co ion leakage (0.19 mg L −1 ) for chlorobenzene degradation in a very wide pH range (3−11). The chlorobenzene removal efficiency was kept stable above 90% over Co@NCNT, much higher than that of nonconfined Co@ NCNS (45%). The low-valence Co NPs achieved a continuous electron redox cycling (Co 0 /Co 2+ → Co 3+ → Co 0 /Co 2+ ) and greatly promoted the O−O bond dissociation of PMS with the least energy (0.83 eV) inside the channel of Co@NCNT to form abundant HO • and SO 4•− . Thus, the deep oxidation of chlorobenzene was achieved without any biphenyl byproducts from the coupling reaction. This study provided a new avenue for designing novel nanoconfined catalysts with outstanding activity, paving the way for the deep oxidation of CVOC waste gas via AOP wet scrubber.

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

Cited by 23 publications

References 65 publications

Ferromagnetic Elements in Two‐Dimensional Materials: 2D Magnets and Beyond

Ferromagnetic Elements in Two‐Dimensional Materials: 2D Magnets and Beyond

La−Cu based heterogeneous perovskite catalyst for highly selective benzene hydroxylation under mild conditions

Deep Oxidation of Chlorinated VOCs by Efficient Catalytic Peroxide Activation over Nanoconfined Co@NCNT Catalysts

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