Fabrication of SrTiO3/g-C3N4 heterostructures for visible light-induced photocatalysis

Ferreira, Meiriele Antunes; Silva, Gelson T.S.T. da; Lopes, Osmando F.; Mastelaro, Valmor Roberto; Ribeiro, Cauê; Pires, M. J. M.; Malagutti, Andréa R.; Avansi, Waldir; Mourão, Henrique A.J.L.

doi:10.1016/j.mssp.2019.104887

Cited by 34 publications

(5 citation statements)

References 37 publications

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“…Photocatalysis is one of the most important methods used in the solution of many problems, especially in the removal/reduction of environmental pollution in waste water [51,52]. Organic dyes compose an important part of industrial pollutants.…”

Section: Photocatalytic Properties Of Czts Thin Lmsmentioning

confidence: 99%

Investigation of photocatalytic activity (under visible light) of ultrathin CZTS films produced in different thicknesses by PLD method

et al. 2023

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Cu 2 ZnSnS 4 material has been produced by Pulsed Laser Deposition (PLD) on Soda Lime Glass (SLG) substrates as a function of the number of laser pulses. As the deposition of ablated material has been augmented with increasing number of laser pulses, it has been observed that CZTS-ultrathin lm's thicknesses and particle sizes have been increased, their crystalline structures have been improved.Larger particles limit the transmission of light and cause thin lms to absorb more photons. Therefore, band gaps of CZTS-ultrathin lms have been reduced. CZTS (61 nm) ultrathin lm with the thinnest one among the thin lms produced in this work, which is Cu and S poor but Sn and Zn rich. By increasing the thickness of the lm, it has been observed that the amount of Cu and S were increased, and the ratio of Sn and Zn were decreased. In addition, it has been systematically investigated that the photocatalytic activity of the ultra-thin CZTS lms coated in different thicknesses by PLD method. Among all the photocatalysts, the CZTS (in 242 nm thickness) photocatalyst has exhibited the highest photocatalytic performance, managing to remove 96.1% of methylene blue (MB) in 240 min. Furthermore, the mechanism that performs photocatalysis has been investigated by scavenger experiments, and it was observed that radical ions have an important role in the reaction, while holes have little effect.

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Section: Photocatalytic Properties Of Czts Thin Lmsmentioning

confidence: 99%

Investigation of photocatalytic activity (under visible light) of ultrathin CZTS films produced in different thicknesses by PLD method

et al. 2023

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“…30 On the basis of our calculations, the results of the analysis of carrier transfer may differ from the previously reported results, in which the band edges are still arranged according to the isolated states of g-C 3 N 4 and SrTiO 3 . 31 Therefore, the photocatalytic mechanism of the g-C 3 N 4 /SrTiO 3 heterojunction is not fully settled and needs to be studied further.…”

Section: T H Imentioning

confidence: 99%

Quantitative Evaluation of the Carrier Separation Performance of Heterojunction Photocatalysts: The Case of g-C₃N₄/SrTiO₃

Bian

Yang

et al. 2023

J. Phys. Chem. Lett.

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Heterojunction photocatalysts are of great interest in the energy and environmental fields, because of their potential to significantly increase the efficiency of harvesting solar energy. Advances in design have been hampered by the continued use of only qualitative analyses. Quantitative evaluation of the carrier separation performance is urgently needed for the design and application of heterojunction photocatalysts. Taking the g-C3N4/SrTiO3 heterojunction as an example, we address the conventional energy band and electronic structure issues by first-principles analysis. After interface coupling, the band edge alignment reverses from that of the respective isolated states of the heterojunction components, suggesting new ways of thinking about the catalytic mechanism of the heterojunction. More significantly, we show the carrier separation performance of heterojunction photocatalysts can be quantitatively predicted by the nonadiabatic molecular dynamics method, enabling more precisely directed research and promoting the quantified design and application of heterojunction photocatalysis, making a contribution of great scientific significance.

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“…As the crystallization of ZnO can also be attained at a moderate temperature, composite preparation remains quite adaptable using different precursors. However, ZnO enables the decomposition of GCN in the composite and its effect increases with increment in the loading of ZnO, which raises concerns on the structural stability at higher temperatures. ,,,,, The ZnO nuclei might disturb the interlayer stacking motifs of GCN or the catalytic effect of ZnO might promote the GCN decomposition . It is speculated that the GCN precursors would be susceptible to direct decomposition into gases during the polycondensation .…”

Section: Challenges and Outlookmentioning

confidence: 99%

Review and Perspective on Rational Design and Interface Engineering of g-C₃N₄/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications

Kumar¹,

Kavitha²,

Manjunatha³

2023

Energy Fuels

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Heterostructuring the g-C 3 N 4 (GCN) with wide gap oxide photocatalysts is of prominent interest as they can harvest photons spanning the UV−visible region. In this regard, GCN/ZnO have garnered remarkable attention due to their admirable structure, optical, dimensional anisotropy, and electronic properties. The 2D sheet-like structure of GCN can serve as a suitable substrate for the growth of distinct ZnO nanostructures under the multitude of reaction conditions. This review focuses on the progress in the rational design and interface engineering of GCN/ZnO to from Type-II and Z/S-scheme heterojunctions, followed by their relevant photocatalytic applications toward H 2 evolution, CO 2 reduction, pollutant degradation, and bacteria inactivation. The mechanism underlying the crystallization of GCN and ZnO together with their intimate contact in the composite are emphasized under the light of diverse preparation methods. The modification of GCN/ZnO with cocatalysts such as metals, alloy, semiconductors, and carbon materials to form ternary systems to highlight their advancements. The gap analysis and future prospectus of this intricate heterostructure concerning the challenges in synthetic approaches and the charge carrier dynamics are discussed. This review envisages the development of efficient GCN/ZnO-based heterostructures for multiscale applications.

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Fabrication of SrTiO3/g-C3N4 heterostructures for visible light-induced photocatalysis

Cited by 34 publications

References 37 publications

Investigation of photocatalytic activity (under visible light) of ultrathin CZTS films produced in different thicknesses by PLD method

Investigation of photocatalytic activity (under visible light) of ultrathin CZTS films produced in different thicknesses by PLD method

Quantitative Evaluation of the Carrier Separation Performance of Heterojunction Photocatalysts: The Case of g-C₃N₄/SrTiO₃

Review and Perspective on Rational Design and Interface Engineering of g-C₃N₄/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications

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Fabrication of SrTiO3/g-C3N4 heterostructures for visible light-induced photocatalysis

Cited by 34 publications

References 37 publications

Investigation of photocatalytic activity (under visible light) of ultrathin CZTS films produced in different thicknesses by PLD method

Investigation of photocatalytic activity (under visible light) of ultrathin CZTS films produced in different thicknesses by PLD method

Quantitative Evaluation of the Carrier Separation Performance of Heterojunction Photocatalysts: The Case of g-C3N4/SrTiO3

Review and Perspective on Rational Design and Interface Engineering of g-C3N4/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications

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Product

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Quantitative Evaluation of the Carrier Separation Performance of Heterojunction Photocatalysts: The Case of g-C₃N₄/SrTiO₃

Review and Perspective on Rational Design and Interface Engineering of g-C₃N₄/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications