TiO2-CeO2/g-C3N4 S-scheme heterostructure composite for enhanced photo-degradation and hydrogen evolution performance with combined experimental and DFT study

Vignesh, S.; Chandrasekaran, Sharmila; Srinivasan, M.; Anbarasan, Radhakrishnan; Ramasamy, P.; Elangovan, Arumugam; Shkir, Mohd.; Algarni, H.; AlFaify, S.

doi:10.1016/j.chemosphere.2021.132611

Cited by 73 publications

(9 citation statements)

References 79 publications

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“…The transient photocurrent response of (001)-TiO 2 is relatively weak, the reason is that (001)-TiO 2 has a wide forbidden band and the probability of electron leap is small, so it is difficult to generate a current signal. 39 The sample TB2 showed the highest photocurrent density, indicating that the heterojunction formed by (001)-TiO 2 /BiOI can increase the photocurrent response intensity. The EIS of the samples was evaluated to discuss the charge transfer resistance.…”

Section: Resultsmentioning

confidence: 91%

(001)-TiO₂ nanosheets loaded on BiOI improve carrier separation and enhance the photocatalytic activity

Mai¹,

Gao²,

Zhang³

et al. 2023

New J. Chem.

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Section: Resultsmentioning

confidence: 91%

(001)-TiO₂ nanosheets loaded on BiOI improve carrier separation and enhance the photocatalytic activity

Mai¹,

Gao²,

Zhang³

et al. 2023

New J. Chem.

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“…Nonetheless, Vignesh et al designed a ternary 0D/0D/2D S-scheme TiO 2 /CeO 2 /g-C 3 N 4 . 322 The calculated band structures of TiO 2 /CeO 2 /g-C 3 N 4 (0.158 eV) via the total density-ofstate plot were narrower than those of pristine g-C 3 N 4 (1.59 eV). This indicated that the introduction of TiO 2 and CeO 2 NPs tuned the CB energy position of g-C 3 N 4 to a lower position, which reduced the band gap for better light utilization (Figure 20G,H).…”

Section: Water Splittingmentioning

confidence: 88%

Section: Photocatalytic Applicationsmentioning

confidence: 99%

“…In addition, the DMPO−•OH signal was observed in the electron paramagnetic resonance (EPR) spectra, which implied that the TiO 2 /g‐C 3 N 4 composite followed the S‐scheme heterojunction mechanism (Figure 20F). Nonetheless, Vignesh et al designed a ternary 0D/0D/2D S‐scheme TiO 2 /CeO 2 /g‐C 3 N 4 322 . The calculated band structures of TiO 2 /CeO 2 /g‐C 3 N 4 (0.158 eV) via the total density‐of‐state plot were narrower than those of pristine g‐C 3 N 4 (1.59 eV).…”

Section: Photocatalytic Applicationsmentioning

confidence: 99%

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Point‐to‐face contact heterojunctions: Interfacial design of 0D nanomaterials on 2D g‐C₃N₄ towards photocatalytic energy applications

Tan

Mohamed

et al. 2022

Carbon Energy

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Green energy generation is an indispensable task to concurrently resolve fossil fuel depletion and environmental issues to align with the global goals of achieving carbon neutrality. Photocatalysis, a process that transforms solar energy into clean fuels through a photocatalyst, represents a felicitous direction toward sustainability. Eco-rich metal-free graphitic carbon nitride (g-C 3 N 4 ) is profiled as an attractive photocatalyst due to its fascinating properties, including excellent chemical and thermal stability, moderate band gap, visible light-active nature, and ease of fabrication. Nonetheless, the shortcomings of g-C 3 N 4 include fast charge recombination and limited surface-active sites, which adversely affect photocatalytic reactions. Among the modification strategies, point-to-face contact engineering of 2D g-C 3 N 4 with 0D nanomaterials represents an innovative and promising synergy owing to several intriguing attributes such as the high specific surface area, short effective charge-transfer pathways, and quantum confinement effects. This review introduces recent advances achieved in experimental and computational studies on the interfacial design of 0D nanostructures on 2D g-C 3 N 4 in the construction of point-to-face heterojunction interfaces. Notably, 0D materials such as metals, metal oxides, metal sulfides, metal selenides, metal phosphides, and nonmetals on g-C 3 N 4 with different charge-transfer mechanisms are systematically discussed along with controllable synthesis strategies. The applications of 0D/2D g-C 3 N 4 -based photocatalysts are focused on

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“…Constructing 2D van der Waals heterostructures (vdWHs) is a powerful strategy to adjust the physical properties of single 2D material. It can integrate the advantages of different 2D materials and might develop new properties that the single ones do not have. − 2D vdWHs possess high carrier mobility, special band alignment, and tunable light-matter coupling . Until now, various types of vdWHs have been developed, especially Schottky heterostructures, type-I, type-II, Z-scheme, and S-scheme heterostructures. − The concept of S-scheme heterostructures was first proposed by Yu et al in 2019, and their unique carriers transport mechanism make them promising photocatalysts that can be applied in energy and environment fields. − To construct an S-scheme heterostructure, semiconductor I (S–I) needs to possess higher conduction band (CB) and valence band (VB) positions than semiconductor II (S–II).…”

Section: Introductionmentioning

confidence: 99%

Strain and Electric Field Engineering of G-ZnO/SnXY (X, Y = S, Se) S-Scheme Heterostructures for Photocatalyst and Electronic Device Applications: A Hybrid DFT Calculation

Tang,

Wang,

Cheng

et al. 2024

ACS Appl. Mater. Interfaces

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Using hybrid density functional theory calculations, we systematically study the biaxial strain and electric field modulated electronic properties of g-ZnO/SnS 2 , g-ZnO/SnSe 2 , and g-ZnO/SnSSe S-scheme van der Waals heterostructures (vdWHs). g-ZnO/SnS 2 and g-ZnO/SnSSe are found to be promising photocatalysts for water splitting with high solar-tohydrogen efficiencies, even under acidic, alkaline, and high-stress conditions. The strain effect on the bandgaps of g-ZnO/SnXY is explained in detail according to the correlation between geometry structure and orbital hybridization of SnXY, which could help understand the strain-induced band structure evolutions in other SnXY (X, Y = S, Se)-based vdWHs. It is surprising that under an external electric field, g-ZnO/SnS 2 , g-ZnO/SnSe 2 , and g-ZnO/SnSSe can offer the occupied nearly free-electron (NFE) states. In many materials, NFE states are usually unoccupied and is not conducive to the charge transport. The NFE state in g-ZnO/SnSe 2 is the most sensitive to the electric field and might be promising electron transport channel in nanoelectronic devices. g-ZnO/SnSe 2 might also have application potential in gas sensors and high-temperature superconductors.

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TiO2-CeO2/g-C3N4 S-scheme heterostructure composite for enhanced photo-degradation and hydrogen evolution performance with combined experimental and DFT study

Cited by 73 publications

References 79 publications

(001)-TiO₂ nanosheets loaded on BiOI improve carrier separation and enhance the photocatalytic activity

(001)-TiO₂ nanosheets loaded on BiOI improve carrier separation and enhance the photocatalytic activity

Point‐to‐face contact heterojunctions: Interfacial design of 0D nanomaterials on 2D g‐C₃N₄ towards photocatalytic energy applications

Strain and Electric Field Engineering of G-ZnO/SnXY (X, Y = S, Se) S-Scheme Heterostructures for Photocatalyst and Electronic Device Applications: A Hybrid DFT Calculation

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TiO2-CeO2/g-C3N4 S-scheme heterostructure composite for enhanced photo-degradation and hydrogen evolution performance with combined experimental and DFT study

Cited by 73 publications

References 79 publications

(001)-TiO2 nanosheets loaded on BiOI improve carrier separation and enhance the photocatalytic activity

(001)-TiO2 nanosheets loaded on BiOI improve carrier separation and enhance the photocatalytic activity

Point‐to‐face contact heterojunctions: Interfacial design of 0D nanomaterials on 2D g‐C3N4 towards photocatalytic energy applications

Strain and Electric Field Engineering of G-ZnO/SnXY (X, Y = S, Se) S-Scheme Heterostructures for Photocatalyst and Electronic Device Applications: A Hybrid DFT Calculation

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(001)-TiO₂ nanosheets loaded on BiOI improve carrier separation and enhance the photocatalytic activity

(001)-TiO₂ nanosheets loaded on BiOI improve carrier separation and enhance the photocatalytic activity

Point‐to‐face contact heterojunctions: Interfacial design of 0D nanomaterials on 2D g‐C₃N₄ towards photocatalytic energy applications