Zinc iron selenide nanoflowers anchored g-C3N4 as advanced catalyst for photocatalytic water splitting and dye degradation

Mohan, Harshavardhan; Ha, Ga Hyeon; Oh, Hyeon Seung; Kim, Gitae; Shin, Taeho

doi:10.1016/j.chemosphere.2022.135937

Cited by 22 publications

(9 citation statements)

References 33 publications

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“…Yue et al found that the average H 2 evolution rate in the case of using 0.5% Pt/10% Zn/g-C 3 N 4 (0.2 g) was significantly increased, up to 59.5 μmol/h compared to 5.5 μmol/h of pure g-C 3 N 4 . This is due to the ability to capture electrons of Zn from the conductive band of g-C 3 N4, leading to enhanced separation of photogenerated electron–hole pairs and an increase in H 2 evolution. , More charge carriers were produced for water splitting because of increased optical absorption upon doping Zn. , The increase in the absorption intensity upon Zn-modification indicated a strong interaction between Zn and the matrix of g-C 3 N 4 which arose from the d–p repulsion between 3d and 2p orbitals of Zn and N, respectively . In a study of Ding et al, they also reported a simple treatment under high temperature (at 600 °C) to obtain alkali metal (including K, Li, or Na)-doped g-C 3 N 4 .…”

Section: Photocatalyst Characteristicsmentioning

confidence: 99%

“…This is due to the ability to capture electrons of Zn from the conductive band of g-C 3 N4, leading to enhanced separation of photogenerated electron−hole pairs and an increase in H 2 evolution. 212,213 More charge carriers were produced for water splitting because of increased optical absorption upon doping Zn. 214,215 The increase in the absorption intensity upon Znmodification indicated a strong interaction between Zn and the matrix of g-C 3 N 4 which arose from the d−p repulsion between 3d and 2p orbitals of Zn and N, respectively.…”

Section: ■ Photocatalyst Characteristicsmentioning

confidence: 99%

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Hydrogen Production by Water Splitting with Support of Metal and Carbon-Based Photocatalysts

Hoang

Pandey

Chen

et al. 2023

ACS Sustainable Chem. Eng.

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Hydrogen energy is environmental-friendly and considered an attractive alternative to fossil fuels. Among the feasible technologies for hydrogen generation, photocatalysis-derived hydrogen from water splitting is considered to be the optimal solution for meeting long-term sustainability and increased energy demands. In this context, various photocatalytic genres are proposed, with metal and carbon-supported photocatalysts demonstrating greater comprehensiveness and potential for addressing solar-driven hydrogen production from water. Several important aspects of the aforementioned photocatalytic genres are reviewed in the present work in an effort to provide pertinent researchers with new horizons for more advanced performance. The review is initiated by introducing the primary principles in photocatalysis, as well as the prerequisites for hydrogen generation from water. The focus then moves to metal-based photocatalysts, where the important features of these materials as photocatalysts are summarized. Related limitations are also discussed, along with the proposed strategies that could potentially mitigate them. Similar systematic summaries are made of knowledge on carbon-based photocatalysts. The review concludes with a discussion of potential future research directions in light of the bottlenecks currently encountered. With the proper research and development, metal-based and carbon-based photocatalysts could produce clean hydrogen from water, thereby fueling global development without causing environmental harm.

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Section: Photocatalyst Characteristicsmentioning

confidence: 99%

Section: ■ Photocatalyst Characteristicsmentioning

confidence: 99%

Hydrogen Production by Water Splitting with Support of Metal and Carbon-Based Photocatalysts

Hoang

Pandey

Chen

et al. 2023

ACS Sustainable Chem. Eng.

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“…The higher photocurrent density seems attributed to the smaller bandgap of Nb 2 O 5 /PdS and efficient light absorption. [31,32] The efficient interfacial charge transfer between Nb 2 O 5 and PdS particles can also enhance the photocurrent response. The photocurrent response results imply that the Nb 2 O 5 /PdS heterostructure would be the most efficient photocatalyst compared to the other two materials owing to more light absorption and effective charge separation.…”

Section: Photocurrent Measurementsmentioning

confidence: 99%

“…The best performance of the composite is well explained by optical, electrochemical and structural property supported from UV-Vis DRS, EIS, photocurrent response, and BET surface area. [32]…”

Section: Photocatalytic Water Splittingmentioning

confidence: 99%

PdS Coupled Nb₂O₅ Superstructure for Photocatalytic Overall Water Splitting

et al. 2023

Self Cite

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An efficient approach to resolve the current energy crisis is the photocatalytic production of hydrogen that is renewable and readily available from water and solar energy. In this study, we prepared nanocomposites by coupling PdS nanodisks on selfassembled Nb 2 O 5 superstructures and demonstrated them as an efficient water splitting photocatalyst for oxygen and hydrogen production. Various characterization techniques were employed to examine the physical and chemical properties and advantages of the Nb 2 O 5 /PdS nanocomposite over bare Nb 2 O 5 superstructure and PdS nanoparticles. The synthesized nanocomposite showed a hydrogen evolution rate of 665 μmol g À 1 min À 1 and oxygen evolution rate of 211 μmol g À 1 min À 1 , which is twice as high as that of Nb 2 O 5 superstructure and three times higher than that of PdS nanoparticles. The composite survived without any structural deterioration, even after six treatment cycles, thereby indicating its practical applicability.

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“…Subsequently, numerous research efforts involving a multitude of semiconductors have been aimed at photocatalytic water splitting. − The overall water splitting mechanism proceeds as follows: the photocatalyst upon absorbing photonic energy greater than its band gap energy generates bulk electron–hole pairs that migrate to the surface without recombination to facilitate reduction and oxidation of water, respectively, to yield H 2 and O 2 . For photocatalytic water splitting, the bottom of the conduction band must be higher than the reduction potential of H + to H 2 (0 V vs NHE) and the top of the valence band must be lower than the oxidation potential (1.23 V vs NHE) . In addition, crossing the activation barrier in the charge transfer process requires photonic energy greater than the photocatalyst band gap for efficient water splitting .…”

Section: Introductionmentioning

confidence: 99%

Visible-Light Photocatalytic Water Splitting and Norfloxacin Degradation by Reduced Graphene Oxide-Coupled MnON Nanospheres

Mohan

Vadivel

Sathya³

et al. 2022

ACS Appl. Energy Mater.

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Photocatalytic water splitting has gained considerable attention owing to the sustainable nature of hydrogen as a clean energy source alternative to fossil fuels. In this study, nanocomposites consisting of manganese oxynitride and reduced graphene oxide were synthesized by the combined involvement of a solvothermal process and Hummer’s method and examined for their photocatalytic applications for water splitting hydrogen production and degradation of norfloxacin as a model pollutant. Spectroscopic and structural analyses showed successful formation of the stable composite in which manganese oxynitride nanoparticles are decorated on graphene sheets. With increasing content of graphene oxide in the composite, it showed the enhanced photocatalytic efficiency in water splitting hydrogen evolution. This is well explained by the large surface area, more light absorption, and interfacial charge transfer in the composite photocatalyst. The hydrogen evolution rates of MnON nanoparticles and MnON/RGO composites of mass ratios 1:1, 1:2, and 1:3 were measured as 250.1, 456.2, 543.6, and 708.5 μmol g–1 min–1, respectively, and the oxygen evolution rates were measured as 129.0, 229.4, 273.4, and 354.6 μmol g–1 min–1, respectively, suggesting the important roles of reduced graphene oxide. The photocatalysts also demonstrated enhanced stability and recyclability after multiple uses.

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Zinc iron selenide nanoflowers anchored g-C3N4 as advanced catalyst for photocatalytic water splitting and dye degradation

Cited by 22 publications

References 33 publications

Hydrogen Production by Water Splitting with Support of Metal and Carbon-Based Photocatalysts

Hydrogen Production by Water Splitting with Support of Metal and Carbon-Based Photocatalysts

PdS Coupled Nb₂O₅ Superstructure for Photocatalytic Overall Water Splitting

Visible-Light Photocatalytic Water Splitting and Norfloxacin Degradation by Reduced Graphene Oxide-Coupled MnON Nanospheres

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Zinc iron selenide nanoflowers anchored g-C3N4 as advanced catalyst for photocatalytic water splitting and dye degradation

Cited by 22 publications

References 33 publications

Hydrogen Production by Water Splitting with Support of Metal and Carbon-Based Photocatalysts

Hydrogen Production by Water Splitting with Support of Metal and Carbon-Based Photocatalysts

PdS Coupled Nb2O5 Superstructure for Photocatalytic Overall Water Splitting

Visible-Light Photocatalytic Water Splitting and Norfloxacin Degradation by Reduced Graphene Oxide-Coupled MnON Nanospheres

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Product

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PdS Coupled Nb₂O₅ Superstructure for Photocatalytic Overall Water Splitting