Photocatalytic performances of manganese oxide nanorods decorated graphene oxide nanocomposites

Yadav, Puneet; Bhaduri, Ayana

doi:10.1016/j.diamond.2023.109820

Cited by 6 publications

(3 citation statements)

References 62 publications

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“…Herein, Brunauer–Emmett–Teller (BET) surface area and BJH pore volume analysis techniques have been carried out for the composite MnU-2 material by following the N 2 adsorption–desorption isotherm route. Like the pristine UNH, the obtained BET curve shows Type-IV isotherms with a typical H3 hysteresis loop for the MnU-2 composite and confirms the existence of microporosity in the composite material as depicted in Figure c. , The obtained surface area for MnU-2 was found to be 709.34 m 2 g –1 , which is slightly less than that earlier reported for the pristine UNH by our group (831.49 m 2 g –1 ) . Likewise, the result of the BJH study demonstrates the occurrence of micropores in the composite MnU-2 as demonstrated in Figure d.…”

Section: Resultssupporting

confidence: 66%

A Visible Light-Driven α-MnO₂/UiO-66-NH₂ S-Scheme Photocatalyst toward Ameliorated Oxy-TCH Degradation and H₂ Evolution

Dash,

Tripathy,

Subudhi

et al. 2024

Langmuir

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Photocatalytic hydrogen production and pollutant degradation using a heterogeneous photocatalyst remains an alternative route for mitigating the impending pollution and energy crisis. Hence, the development of cost-effective and environmentally friendly semiconducting materials with high solar light captivation nature is imperative. To overcome this challenge, α-MnO 2 nanorod (NR)-modified MOF UiO-66-NH 2 (UNH) was prepared via a facile solvothermal method, which is efficient toward H 2 evolution and oxy-tetracycline hydrochloride (O-TCH) degradation. The field-emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HR-TEM) results of the α-MnO 2 @UNH (MnU) hybrid reveals its nanorod embedded in MOF matrix, and the X-ray photoelectron spectroscopy (XPS) result confirms the interaction of UNH moiety with α-MnO 2 NRs. Additionally, the outstanding separation of photogenerated excitons and the charge-transfer efficacy are further validated by photoluminescence (PL), time-resolved photoluminescence (TRPL), electrochemical impedance spectroscopy (EIS), and transient photocurrent analysis, which are the key causes for photoactivity augmentation in the MnU composites. The MnU-2 composite shows a superior O-TCH degradation efficiency of 93.23% and an excellent H 2 production rate of about 410.6 μmol h −1 upon light irradiation. This study provides significant evidence in favor of the suggested mediator-free S-scheme-adapted charge migration path, and it effectively explains the enhanced exciton separation leading to extraordinary catalytic efficiency of the proposed composite.

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Section: Resultssupporting

confidence: 66%

A Visible Light-Driven α-MnO₂/UiO-66-NH₂ S-Scheme Photocatalyst toward Ameliorated Oxy-TCH Degradation and H₂ Evolution

Dash,

Tripathy,

Subudhi

et al. 2024

Langmuir

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“…Moreover, both bare α-MnO 2 nanorods and α-MnO 2 nanorods adorned graphene oxide nanocomposites were synthesized by reflux-assisted coprecipitation method with encouraging electrochemical and photocatalytic properties [148,149].…”

Section: Co-precipitation Methodsmentioning

confidence: 99%

“…From the XRD results, we observed that at lower temperatures till 500 °C we got α‐MnO 2 phase of nanocrystals while at 600 °C we got a phase change over to α‐Mn 2 O 3 61. Moreover, both bare α‐MnO 2 nanorods and α‐MnO 2 nanorods adorned graphene oxide nanocomposites were synthesized by reflux‐assisted coprecipitation method with encouraging electrochemical and photocatalytic properties 148, 149.…”

Section: Synthesis Of Manganese Oxide Nanomaterialsmentioning

confidence: 97%

Manganese Oxide Nanoparticles: An Insight into Structure, Synthesis and Applications

2023

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Manganese oxide nanoparticles with different crystal phases, morphologies, and structural diversity along with their exceptional properties like high specific surface area, a high fraction of surface atoms, non‐toxic nature, and excellent redox properties are drawing attention for various applications in storage science, especially in the batteries, super‐capacitors, energy conversion, and the environmental catalysis field. Precise control of particle size, morphology, surface area, Mnx+ oxidation state, etc. is the utmost important aspect to explore their application to the full potential. Here, the emphasis is on the recent trends in manganese oxide research – structure, synthesis, and applications. The structure of numerous crystalline phases of manganese oxide nanoparticles are summerized and several facile chemical synthesis processes to achieve the desired crystalline/amorphous structure are discoursed. Temperature and different synthesis conditions dependent phase transformations of β‐MnO2, α‐Mn2O3, and Mn3O4 from α‐MnO2 are discussed as well. The pragmatic approach directs that the application field is mostly controlled by the morphologies.

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Biogenic synthesis of Fe3O4/NiO nanocomposites using Ocimum basilicum leaves for enhanced degradation of organic dyes and hydrogen evolution

Eddine,

Mohammed,

Salmi

et al. 2023

J Porous Mater

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Photocatalytic performances of manganese oxide nanorods decorated graphene oxide nanocomposites

Cited by 6 publications

References 62 publications

A Visible Light-Driven α-MnO₂/UiO-66-NH₂ S-Scheme Photocatalyst toward Ameliorated Oxy-TCH Degradation and H₂ Evolution

A Visible Light-Driven α-MnO₂/UiO-66-NH₂ S-Scheme Photocatalyst toward Ameliorated Oxy-TCH Degradation and H₂ Evolution

Manganese Oxide Nanoparticles: An Insight into Structure, Synthesis and Applications

Biogenic synthesis of Fe3O4/NiO nanocomposites using Ocimum basilicum leaves for enhanced degradation of organic dyes and hydrogen evolution

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Photocatalytic performances of manganese oxide nanorods decorated graphene oxide nanocomposites

Cited by 6 publications

References 62 publications

A Visible Light-Driven α-MnO2/UiO-66-NH2 S-Scheme Photocatalyst toward Ameliorated Oxy-TCH Degradation and H2 Evolution

A Visible Light-Driven α-MnO2/UiO-66-NH2 S-Scheme Photocatalyst toward Ameliorated Oxy-TCH Degradation and H2 Evolution

Manganese Oxide Nanoparticles: An Insight into Structure, Synthesis and Applications

Biogenic synthesis of Fe3O4/NiO nanocomposites using Ocimum basilicum leaves for enhanced degradation of organic dyes and hydrogen evolution

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Product

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A Visible Light-Driven α-MnO₂/UiO-66-NH₂ S-Scheme Photocatalyst toward Ameliorated Oxy-TCH Degradation and H₂ Evolution

A Visible Light-Driven α-MnO₂/UiO-66-NH₂ S-Scheme Photocatalyst toward Ameliorated Oxy-TCH Degradation and H₂ Evolution