Preparation of SrTiO3/Bi2S3 Heterojunction for Efficient Photocatalytic Hydrogen Production

Ganapathy, Mano; Hsu, Yang; Thomas, Joy; Chen, Liang‐Yih; Chang, Chang-Tang; Alagan, Viswanathan

doi:10.1021/acs.energyfuels.1c00979

Cited by 47 publications

(10 citation statements)

References 54 publications

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“…Further, the O 1s peak observed at 529.2 eV is assigned to the bridging oxygen on SrTiO 3 surfaces, while at 531.9 eV it is due to oxygen vacancies which have an obvious improvement in bringing the photocatalytic activity of SrTiO 3 . 45,46 All the above characterized modifications made SrTiO 3 −Ni 2 P a better candidate for photocatalytic water splitting.…”

Section: Resultsmentioning

confidence: 99%

Development of Sustainable Catalyst Coating of Ni₂P Engineered SrTiO₃ Nanocubes for Hydrogen Generation

Meera

Abhirami

Hossain

et al. 2022

ACS Appl. Eng. Mater.

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Ni 2 P has a significant importance in the field of photocatalytic water splitting, irrespective of its narrow band gap (1.0 eV). The photocatalytic performance of bare Ni 2 P is highly limited due to the fast recombination rate of the electron−hole pairs. However, it can be used suitably for tuning the band gap of wide band gap semiconductors. The present study involves the development of an effective heterojunction with tuned band gap by Ni 2 P engineered SrTiO 3 nanocubes in the form of a coating after successful compositional tuning. This is accomplished by an in situ decoration of SrTiO 3 nanocubes at the active sites of Ni 2 P via a chemical reduction method. Morphological and physical features of the developed catalyst are tuned in the coating in order to have Ni 2 P as the major phase for maintaining the physical structure and to impart enhancement in photocatalytic performance and stability to the catalyst system. As the conduction band of SrTiO 3 lies at a more negative potential compared to that of Ni 2 P, the excited electrons from SrTiO 3 can easily be injected to the active sites of Ni 2 P for proton reduction. Thus, in addition to tuning the composite energy band gap, Ni 2 P acts as the reaction center for hydrogen generation and as the stable catalyst bed for SrTiO 3 nanocube decoration. The appearance of SrTiO 3 enriches the electron density at the Ni 2 P active sites, and Ni 2 P with negatively charged phosphorus has the ability to capture more protons at these sites for accelerating the rate of hydrogen generation. The enhancement in the microsurface properties of Ni 2 P in the composite coating are evaluated with OSP technique. The hydrogen generation rate as high as 7.03 mmol/g/h is achieved with the as-engineered catalyst coating, with an apparent quantum yield of 23.72% at 400 nm. The catalyst system shows a sustained hydrogen generation rate even after 15 cycles confirming the suitability of large scale production for industrial applications.

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Section: Resultsmentioning

confidence: 99%

Development of Sustainable Catalyst Coating of Ni₂P Engineered SrTiO₃ Nanocubes for Hydrogen Generation

Meera

Abhirami

Hossain

et al. 2022

ACS Appl. Eng. Mater.

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“…A heterojunction is created when two dissimilar semiconductors come into physical contact, resulting in an interface region . Typically, conventional heterojunctions can be divided into three cases, as shown in Figure a.…”

Section: Heterojunctionmentioning

confidence: 99%

“…A heterojunction is created when two dissimilar semiconductors come into physical contact, resulting in an interface region. 83 Typically, conventional heterojunctions can be divided into three cases, as shown in Figure 6a. Valence band (VB) and conduction band (CB) energies of photocatalyst A are smaller and larger than those of photocatalyst B, respectively, for Type I heterojunctions.…”

Section: Heterojunctionmentioning

confidence: 99%

Review on CeO₂-Based Photocatalysts for Photocatalytic Reduction of CO₂: Progresses and Perspectives

Cai

Jiang

et al. 2023

Energy Fuels

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A promising approach is to transform carbon dioxide (CO2) into renewable, high value-added products with minimal environmental impact and maximum efficiency. Many problems, including energy shortages and environmental degradation, are caused by high CO2 levels, but this can help. Photocatalytic reduction methods are a promising technology for solving these problems. Cerium dioxide (CeO2) is one of the most important rare earth oxides, and cerium dioxide-based photocatalysts have gained a lot of attention in recent years due to their distinctive features, such as their tunable electronic structures and their excellent photocatalytic performances. However, the wide energy band of cerium oxide limits its utilization of light. This review provides various strategies for the modification of cerium oxide, encompassing external atom doping, heterostructure fabrication, defect fabrication, and crystal plane modulation, to improve the catalytic performance of CeO2. The fundamentals of the conversion of CeO2-based photocatalysts into high value-added products are also summarized. Finally, the challenges and prospects of CeO2-based catalysts for photocatalytic reduction of CO2 are presented.

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“…Against this background, photocatalytic hydrogen production, which can convert and store solar energy in the form of chemical energy, has been proposed and has attracted widespread attention from the scientific community. [1][2][3][4][5][6][7][8][9][10][11][12][13] However, photocatalytic hydrogen production efficiency remains unfavourable mainly due to rapid photogenerated charge carrier recombination. Therefore, various efforts, such as heterojunction construction, defect engineering, and cocatalyst loading, have been made to facilitate photogenerated charge carrier separation.…”

Section: Introductionmentioning

confidence: 99%

Surface-active site modulation of the S-scheme heterojunction toward exceptional photocatalytic performance

Wang

Zhang

et al. 2022

Nanoscale

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Preparation of SrTiO₃/Bi₂S₃ Heterojunction for Efficient Photocatalytic Hydrogen Production

Cited by 47 publications

References 54 publications

Development of Sustainable Catalyst Coating of Ni₂P Engineered SrTiO₃ Nanocubes for Hydrogen Generation

Development of Sustainable Catalyst Coating of Ni₂P Engineered SrTiO₃ Nanocubes for Hydrogen Generation

Review on CeO₂-Based Photocatalysts for Photocatalytic Reduction of CO₂: Progresses and Perspectives

Surface-active site modulation of the S-scheme heterojunction toward exceptional photocatalytic performance

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Preparation of SrTiO3/Bi2S3 Heterojunction for Efficient Photocatalytic Hydrogen Production

Cited by 47 publications

References 54 publications

Development of Sustainable Catalyst Coating of Ni2P Engineered SrTiO3 Nanocubes for Hydrogen Generation

Development of Sustainable Catalyst Coating of Ni2P Engineered SrTiO3 Nanocubes for Hydrogen Generation

Review on CeO2-Based Photocatalysts for Photocatalytic Reduction of CO2: Progresses and Perspectives

Surface-active site modulation of the S-scheme heterojunction toward exceptional photocatalytic performance

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Preparation of SrTiO₃/Bi₂S₃ Heterojunction for Efficient Photocatalytic Hydrogen Production

Development of Sustainable Catalyst Coating of Ni₂P Engineered SrTiO₃ Nanocubes for Hydrogen Generation

Development of Sustainable Catalyst Coating of Ni₂P Engineered SrTiO₃ Nanocubes for Hydrogen Generation

Review on CeO₂-Based Photocatalysts for Photocatalytic Reduction of CO₂: Progresses and Perspectives