Photocatalytic water splitting over CeO2/Fe2O3/Ver photocatalysts

Reli, Martin; Ambrožová, Nela; Valášková, Marta; Edelmannová, Miroslava; Čapek, Libor; Schimpf, Christian; Motylenko, Mykhaylo; Rafaja, David; Kočí, Kamila

doi:10.1016/j.enconman.2021.114156

Cited by 20 publications

(8 citation statements)

References 42 publications

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“…The photo‐response of the synthesized materials was examined by measuring transient photocurrent [30] . Seven consecutive light on/off cycles were applied to monitor the photocurrent behavior (Figure 4 (b) ).…”

Section: Resultsmentioning

confidence: 99%

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PdS Coupled Nb₂O₅ Superstructure for Photocatalytic Overall Water Splitting

et al. 2023

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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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Section: Resultsmentioning

confidence: 99%

“…The photo-response of the synthesized materials was examined by measuring transient photocurrent. [30] Seven consecutive light on/off cycles were applied to monitor the photocurrent behavior (Figure 4(b)). The identified order of the photocurrent density is Nb 2 O 5 < PdS < Nb 2 O 5 /PdS heterostructures.…”

Section: Photocurrent Measurementsmentioning

confidence: 99%

PdS Coupled Nb₂O₅ Superstructure for Photocatalytic Overall Water Splitting

et al. 2023

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“…For solar hydrogen generation, photoelectrochemical (PEC) water-splitting has received intense attention during the past decade due to its versatile properties [1]. Hematite (α-Fe 2 O 3 ) is an n-type semiconductor candidate for solar water splitting that is earth-abundant and stable and possesses an appropriate band-gap of 2.2 eV that ranges in the visible region [2][3][4]. It was stable against photocorrosion in alkaline solutions.…”

Section: Introductionmentioning

confidence: 99%

“…However, the performance of hematite for solar water splitting is limited by factors such as poor conductivity, oxygen evolution reactions (OER), a short hole diffusion length between 2 and 4 nm, a short lifetime of the excitedstate carrier between 10 and 12 s, and improper band positions [2][3][4][5][6][7][8][9]. TiO 2 is another important transition metal oxide that displays a favorable band edge position, strong optical absorption, and an inexpensive cost [1,[10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photoelectrochemical Water-Splitting through Application of Layer by Layer (LBL) and Hydrothermal (HT) Methods in TiO2 and α-Fe2O3 Hierarchical Structures

Azad¹,

Kim²

2022

Korean J. Met. Mater.

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Improving solar energy conversion efficiency and reducing energy loss have become critical issues in recent decades. Photoelectrochemical (PEC) water splitting provides an ideal method for solar energy harvesting and is a key factor in decreasing the use of fossil fuels. Thus, it is extremely important to identify cost-effective, highly active, and robust semiconducting photoelectrodes that can reduce the overpotential reaction and increase electrocatalytic efficiency. However, for overall water splitting, it is challenging to identify suitable photocatalysts with efficient band structures and suitable charge separation for electron-hole pairs. Water splitting is conventionally performed using independent layer-by-layer (LBL) or hydrothermal (HT) techniques. However, this research aims to produce a photoanode by applying both HT and LBL methods in sequence to reduce energy loss during the electron transfer process between the two photosystems. In this study, a TiO2 layer was deposited onto fluorine tin oxide (FTO) glass using the LBL method (TiO2/FTO). Subsequently, hematite (α-Fe2O3) thin films that were synthesized using the HT method were deposited onto TiO2/FTO glasses (Fe2O3/TiO2/FTO). The as-prepared and newly-designed photoanode Fe2O3/TiO2/FTO demonstrates a significantly high photocatalytic activity of 7.68 mA/cm2.Thus, by combining the HT and LBL methods, excellent hydrogen production performance in regard to photocatalytic water splitting was achieved. Furthermore, this hierarchical structure provides good chemical stability and is an excellent candidate for large-scale applications.

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“…Photocatalysis has been considered to be a highly efficient and economic method to dispose of organic pollutants in water and has attracted increasing attention recently. − Among the various kinds of photocatalysts, metal chalcogenides have been widely studied, such as ZnS, − Bi 2 S 3 , − CuS, − CdS, − and so on, because of their controllable band structures and excellent performance for photocatalytic degradation of organic pollutants under light irradiation. However, some shortcomings, such as low solar utilization efficiency, toxicity, and rapid recombination of photogenerated electron–hole pairs, prevent their extensive applications. − The reported research studies indicate that the design and synthesis of chalcogenide composites is an effective method to improve the photocatalytic performance in the degradation process. − …”

Section: Introductionmentioning

confidence: 99%

Delicate Design of ZnS@In₂S₃ Core–Shell Structures with Modulated Photocatalytic Performance under Simulated Sunlight Irradiation

Guo

Chen

et al. 2022

ACS Omega

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ZnS@In2S3 core–shell structures with high photocatalytic activity have been delicately designed and synthesized. The unique structure and synergistic effects of the composites have an important influence on the improvement of photocatalytic activity. The photocatalytic activity has been studied by photodegrading individual eosin B (EB) and the mixture solution consisting of eosin B and rhodamine B (EB-RhB) in the presence of hydrogen peroxide (H2O2) under simulated sunlight irradiation. The results show that all of the photocatalysts with different contents of In2S3 exhibit enhanced catalytic activity compared to pure ZnS for the degradation of EB and EB-RhB solution. When the theoretical molar ratio of ZnS to In2S3 was 1:0.5, the composite presents the highest photocatalytic efficiency, which could eliminate more than 98% of EB and 94% of EB-RhB. At the same time, after five cycles of photocatalytic tests, the photocatalytic efficiency could be about 96% for the degradation of the EB solution, and relatively high photocatalytic activity could also be obtained for the degradation of the EB-RhB mixed solution. This work has proposed a facile synthetic process to realize the controlled preparation of core–shell ZnS@In2S3 composites with effectively modulated structures and compositions, and the composites have also proved to be high-efficiency photocatalysts for the disposal of complicated pollutants.

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Photocatalytic water splitting over CeO2/Fe2O3/Ver photocatalysts

Cited by 20 publications

References 42 publications

PdS Coupled Nb₂O₅ Superstructure for Photocatalytic Overall Water Splitting

PdS Coupled Nb₂O₅ Superstructure for Photocatalytic Overall Water Splitting

Enhanced Photoelectrochemical Water-Splitting through Application of Layer by Layer (LBL) and Hydrothermal (HT) Methods in TiO2 and α-Fe2O3 Hierarchical Structures

Delicate Design of ZnS@In₂S₃ Core–Shell Structures with Modulated Photocatalytic Performance under Simulated Sunlight Irradiation

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Photocatalytic water splitting over CeO2/Fe2O3/Ver photocatalysts

Cited by 20 publications

References 42 publications

PdS Coupled Nb2O5 Superstructure for Photocatalytic Overall Water Splitting

PdS Coupled Nb2O5 Superstructure for Photocatalytic Overall Water Splitting

Enhanced Photoelectrochemical Water-Splitting through Application of Layer by Layer (LBL) and Hydrothermal (HT) Methods in TiO2 and α-Fe2O3 Hierarchical Structures

Delicate Design of ZnS@In2S3 Core–Shell Structures with Modulated Photocatalytic Performance under Simulated Sunlight Irradiation

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Product

Resources

About

PdS Coupled Nb₂O₅ Superstructure for Photocatalytic Overall Water Splitting

PdS Coupled Nb₂O₅ Superstructure for Photocatalytic Overall Water Splitting

Delicate Design of ZnS@In₂S₃ Core–Shell Structures with Modulated Photocatalytic Performance under Simulated Sunlight Irradiation