Influence of secondary oxide phases in enhancing the photocatalytic properties of alkaline earth elements doped LaFeO3 nanocomposites

Vijayaraghavan, T.; Bradha, M.; Babu, Pradeepta; Parida, Kulamani; Ramadoss, Govindarajan; Vadivel, S.; Selvakumar, R.; Ashok, Anuradha

doi:10.1016/j.jpcs.2020.109377

Cited by 34 publications

(7 citation statements)

References 44 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: 73%

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: 73%

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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“…It is interesting to note that the absorption band of h-PCN shows a red shift, and the photo-absorption broadens from UV to visible region, implying that phosphorus incorporation was able to influence the optical absorption phenomenon of h-PCN. 30 The higher visible-light absorption throughout the entire solar spectrum by h-PCN due to its suitable band-gap value corroborates its excellent photoelectrochemical activity. Figure 3b depicts the photoluminescence spectra of all of the synthesized photocatalysts.…”

Section: Resultsmentioning

confidence: 75%

“…The greater extent of absorption in the case of h-CN is attributed to its nanostructured architecture, which provides more active sites for catalytic reaction. It is interesting to note that the absorption band of h-PCN shows a red shift, and the photo-absorption broadens from UV to visible region, implying that phosphorus incorporation was able to influence the optical absorption phenomenon of h-PCN . The higher visible-light absorption throughout the entire solar spectrum by h-PCN due to its suitable band-gap value corroborates its excellent photoelectrochemical activity.…”

Section: Resultsmentioning

confidence: 79%

Trioctylphosphine Oxide (TOPO)-Assisted Facile Fabrication of Phosphorus-Incorporated Nanostructured Carbon Nitride Toward Photoelectrochemical Water Splitting with Enhanced Activity

et al. 2022

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Designing nanostructured arrays of two-dimensional surfaces and interfaces is a versatile approach to increasing their photoelectrochemical activity. Here, phosphorus (P)incorporated nanostructured carbon nitride (h-PCN) with an enlarged surface area is fabricated by employing trioctylphosphine oxide (TOPO) as a dopant precursor for visiblelight-driven photoelectrochemical water splitting to produce hydrogen. The structural, morphological, and electronic properties of the photocatalyst have been characterized through various physicochemical techniques. We show that the incorporation of P into the g-C 3 N 4 framework enhances light absorption over broad regimes, charge separation, and migration, as well as the specific surface area, showing excellent photocurrent enhancement (5.4 folds) in the cathodic direction as compared to bulk g-C 3 N 4 . Moreover, the photocathode shows 3.3-fold enhancement in current at zero biased potential. Without using any cocatalyst, the photoelectrodes produced 27 μmol h −1 of H 2 and 13 μmol h −1 of O 2 with 95% faradic efficiency. The excellent photoelectrochemical behavior toward water-splitting reactions by the photoelectrode is attributed to the synergistic effect of P incorporation and active sites emerging from the nanostructured architecture of the material. This work demonstrates the facile fabrication of nanostructured P-incorporated g-C 3 N 4 toward water-splitting reactions to produce hydrogen without using a cocatalyst in a simple and cost-effective way.

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“…Therefore, for rational comparison, we have also provided details regarding light source and sacrificial reagents used in the investigations. Noticeably, the H 2 evolution rate (HER) of our as-prepared nanocomposite is reasonably higher than that of different LaFeO 3 based nanocomposites and alkaline-earth doped LaFeO 3 nanoparticles [57,58]. For instance, Xu et al have reported that maximum HERs of 7 and 121.2 μmol g -1 h -1 can be achieved by modifying LaFeO 3 /g-C 3 N 4 heterojunctions with CdS and NiS co-catalysts, respectively [57].…”

Section: F Photocatalytic Hydrogen Generationmentioning

confidence: 67%

Nanostructured LaFeO3-MoS2 for efficient photodegradation and photocatalytic hydrogen evolution

Das¹,

Dutta²,

Tama³

et al. 2021

Materials Science and Engineering: B

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Influence of secondary oxide phases in enhancing the photocatalytic properties of alkaline earth elements doped LaFeO3 nanocomposites

Cited by 34 publications

References 44 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

Trioctylphosphine Oxide (TOPO)-Assisted Facile Fabrication of Phosphorus-Incorporated Nanostructured Carbon Nitride Toward Photoelectrochemical Water Splitting with Enhanced Activity

Nanostructured LaFeO3-MoS2 for efficient photodegradation and photocatalytic hydrogen evolution

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