Synthesis and characterization of A site doped lanthanum based perovskite catalyst for the oxidation of soot

Akinlolu, Kayode; Omolara, Bangboye; Kehinde, Oladele Joseph; Shailendra, Tripathi

doi:10.1088/1757-899x/509/1/012062

Cited by 9 publications

(6 citation statements)

References 32 publications

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“…The fresh and spent LaCoO 3 /P-g-C 3 N 4 nanocomposite displayed an abrupt weight loss starting at 472 °C until 717 °C and 431 °C until 687 °C, respectively. This can be associated with the intrinsic thermal instability of g-C 3 N 4 and can also be possibly from the initiation of perovskite phase formation, as evident from previous reports . The TGA of the spent catalyst also showed similar trends as the fresh catalyst, indicating that the thermal stability is intact even after 4 h of irradiation time.…”

Section: Resultssupporting

confidence: 73%

“…This can be associated with the intrinsic thermal instability of g-C 3 N 4 71 and can also be possibly from the initiation of perovskite phase formation, as evident from previous reports. 72 The TGA of the spent catalyst also showed similar trends as the fresh catalyst, indicating that the thermal stability is intact even after 4 h of irradiation time. However, the slight difference in weight loss at starting and ending temperatures suggests that the spent sample showed events of bond impartiality and development of metal salt along with LaCoO 3 phase formation at a slightly lower temperature.…”

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confidence: 99%

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Constructing La_xCo_yO₃ Perovskite Anchored 3D g-C₃N₄ Hollow Tube Heterojunction with Proficient Interface Charge Separation for Stimulating Photocatalytic H₂ Production

Tasleem

Tahir

2021

Energy Fuels

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La x Co y O3 perovskite dispersed porous three-dimensional (3D) g-C3N4 hollow nanotubes to construct a Z-scheme nanocomposite were successfully synthesized via a wet impregnation assisted ultrasonic approach and were used for photocatalytic H2 generation in a liquid phase slurry photoreactor under visible light. A rhombohedral distorted LaCoO3 perovskite with 1.70 eV narrow band gap for improved optical properties was synthesized by the combination of coprecipitation and a hydrothermal method. Additionally, two-dimensional (2D) porous g-C3N4 with advantageous structural features was synthesized by a novel, facile, and cost-effective technique depicting exposed active sites with improved charge mobility and charge separation. A Z-scheme heterojunction by a wet impregnation assisted ultrasonic technique was constructed by LaCoO3 anchored onto hollow tubular porous g-C3N4 formed after the curling of flaked nanosheets into hollow tubes. Highest amount of H2 was generated by 15 wt % of LaCoO3 dispersed over porous g-C3N4 in the nanocomposite. The Z-scheme heterojunction generated H2 (800 μmol g–1) which was 1.41 and 1.77 times higher than pristine porous g-C3N4 and pristine LaCoO3, respectively, contributing to the improved visible light absorption and reduced band gap, mass transfer, charge mobility, and charge separation. The nanocomposite showed stability over three consecutive cycles. Also, the nanocomposite generated CH4 by the simultaneous occurrence of water splitting and photoreforming. The apparent quantum efficiency of the nanocomposite was also calculated and estimated to be 1.52 and 1.26 times improved over LaCoO3 and P-g-C3N4, respectively. Overall, this work gives insight into less costly and simple Z-scheme heterojunctions for solar to hydrogen conversion with high efficiency.

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Section: Resultssupporting

confidence: 73%

mentioning

confidence: 99%

Constructing La_xCo_yO₃ Perovskite Anchored 3D g-C₃N₄ Hollow Tube Heterojunction with Proficient Interface Charge Separation for Stimulating Photocatalytic H₂ Production

Tasleem

Tahir

2021

Energy Fuels

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“…chemistry methods are characterized by their simplicity, reduced sintering time, mass production, high level of repeatability, lower temperature (than solid-state reaction), better flexibility in thin film-forming superior homogeneity, improved control of stoichiometry, purity, particle size, and a low industrialization implementation cost (Assirey, 2019). One of the challenges faced in the development of perovskite catalyst is obtaining the right structure and maintaining high surface area because of high calcination temperature employed sometimes during synthesis (Akinlolu et al, 2019). Hence, the choice of method of preparation is a top priority.…”

Section: General Synthesis Methods For Perovskitesmentioning

confidence: 99%

Perovskite Oxide–Based Materials for Photocatalytic and Photoelectrocatalytic Treatment of Water

Nkwachukwu

Arotiba

2021

Front. Chem.

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Meeting the global challenge of water availability necessitates diversification from traditional water treatment methods to other complementary methods, such as photocatalysis and photoelectrocatalysis (PEC), for a more robust solution. Materials play very important roles in the development of these newer methods. Thus, the quest and applications of a myriad of materials are ongoing areas of water research. Perovskite and perovskite-related materials, which have been largely explored in the energy sectors, are potential materials in water treatment technologies. In this review, attention is paid to the recent progress in the application of perovskite materials in photocatalytic and photoelectrocatalytic degradation of organic pollutants in water. Water treatment applications of lanthanum, ferrite, titanate, and tantalum (and others)-based perovskites are discussed. The chemical nature and different synthetic routes of perovskites or perovskite composites are presented as fundamental to applications.

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Section: Introductionmentioning

confidence: 99%

“…In the literature, it has been reported that the catalytic activities of perovskite oxides were improved by the A-site doping strategy [39][40][41]. By A-site doping, oxygen vacancies will be generated [39]. It was also reported that oxygen vacancies at the cathode improve the catalytic activity of ammonia synthesis [42].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ammonia from water and nitrogen using a compo-site cathode based on La0.6Ba0.4Fe0.8Cu0.2O3-δ-Ce0.8Gd0.18Ca0.02O2-δ

Amar

2022

J. Electrochem. Sci. Eng.

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Carbon-free electrochemical synthesis of ammonia is a promising technology for CO2 emission reduction. This study aims to explore the electrocatalytic activity of A-site Ba-doped perovskite cathode catalyst (La0.6Ba0.4Fe0.8Cu0.2O3-δ, LBFCu) for ammonia synthesis from water and nitrogen. LBFCu was prepared via the sol-gel method using combined EDTA-citrate complexing agents and characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). Ammonia was successfully synthesised from water and nitrogen under atmospheric pressure, and LBFCu mixed with Ce0.8Gd0.18Ca0.02O2-δ (CGDC) was used as a cathode. When a voltage was applied to the cell containing CGDC-carbonate composite solid electrolyte, ammonia formation was observed at 375, 400, 425 and 450 °C. At 400 °C and 1.4 V, the maximum rate of ammonia production was achieved at 4.0×10-11 mol s-1 cm-2, which corresponds to Faradaic efficiency of ~ 0.06 % at the current density of 19 mA cm-2. According to the findings, the synthesis of ammonia directly from water and nitrogen may be considered a promising green synthesis technology.

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Synthesis and characterization of A site doped lanthanum based perovskite catalyst for the oxidation of soot

Cited by 9 publications

References 32 publications

Constructing La_xCo_yO₃ Perovskite Anchored 3D g-C₃N₄ Hollow Tube Heterojunction with Proficient Interface Charge Separation for Stimulating Photocatalytic H₂ Production

Constructing La_xCo_yO₃ Perovskite Anchored 3D g-C₃N₄ Hollow Tube Heterojunction with Proficient Interface Charge Separation for Stimulating Photocatalytic H₂ Production

Perovskite Oxide–Based Materials for Photocatalytic and Photoelectrocatalytic Treatment of Water

Synthesis of ammonia from water and nitrogen using a compo-site cathode based on La0.6Ba0.4Fe0.8Cu0.2O3-δ-Ce0.8Gd0.18Ca0.02O2-δ

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Synthesis and characterization of A site doped lanthanum based perovskite catalyst for the oxidation of soot

Cited by 9 publications

References 32 publications

Constructing LaxCoyO3 Perovskite Anchored 3D g-C3N4 Hollow Tube Heterojunction with Proficient Interface Charge Separation for Stimulating Photocatalytic H2 Production

Constructing LaxCoyO3 Perovskite Anchored 3D g-C3N4 Hollow Tube Heterojunction with Proficient Interface Charge Separation for Stimulating Photocatalytic H2 Production

Perovskite Oxide–Based Materials for Photocatalytic and Photoelectrocatalytic Treatment of Water

Synthesis of ammonia from water and nitrogen using a compo-site cathode based on La0.6Ba0.4Fe0.8Cu0.2O3-δ-Ce0.8Gd0.18Ca0.02O2-δ

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Constructing La_xCo_yO₃ Perovskite Anchored 3D g-C₃N₄ Hollow Tube Heterojunction with Proficient Interface Charge Separation for Stimulating Photocatalytic H₂ Production

Constructing La_xCo_yO₃ Perovskite Anchored 3D g-C₃N₄ Hollow Tube Heterojunction with Proficient Interface Charge Separation for Stimulating Photocatalytic H₂ Production