Vacancy-defect semiconductor quantum dots induced an S-scheme charge transfer pathway in 0D/2D structures under visible-light irradiation

Bi, Feng; Su, Yuetan; Zhang, Yili; Chen, Mei‐Ling; Darr, Jawwad A.; Weng, Xiaole; Wu, Zhongbiao

doi:10.1016/j.apcatb.2022.121109

Cited by 67 publications

(31 citation statements)

References 56 publications

(66 reference statements)

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“…This indicated that bi-sources of Zn and the ligand aided in the construction of more defective interfaces in C–ZnO 0.5 /ZAA foam, which was shown to have a high redox ability when compared to pure ZnO and ZIF-8. 103,104 Based on the above photo-electric performance analysis, C–ZnO 0.5 /ZAA foam had enhanced photo-absorption, photo-induced electrons, conductivity, and redox ability, endowing C–ZnO 0.5 /ZAA foam with efficient photocatalysis-assisted regeneration.…”

Section: Resultsmentioning

confidence: 97%

Construction of Janus-structured ZnO@ZIF-8(-NH₂)/cellulose nanofiber foam for highly efficient adsorption and photocatalysis-assisted desorption of tetracycline

Zhang

Shah

et al. 2022

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 97%

Construction of Janus-structured ZnO@ZIF-8(-NH₂)/cellulose nanofiber foam for highly efficient adsorption and photocatalysis-assisted desorption of tetracycline

Zhang

Shah

et al. 2022

J. Mater. Chem. A

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“…Moreover, oxygen defects may be generated to speed up the separation of photogenerated carriers during the modification of g-C 3 N 4 by oxide QDs. [89][90][91] Based on these advantages, oxide QDs/g-C 3 N 4 composites are more used in environmental fields for the treatment of pollutants. Similarly, vanadate QDs with wide energy bandgaps and likely oxygen vacancies can also form heterojunction with g-C 3 N 4 , resulting in better photocatalytic performance.…”

Section: Classifications Of Qds/g-c 3 N 4 Compositesmentioning

confidence: 99%

“…Both forms were efficiently separated and restrained the recombination of photogenerated e − -h + pairs. [56,90,93,117]…”

Section: Tighter Interface Contactmentioning

confidence: 99%

The Collision between g‐C₃N₄ and QDs in the Fields of Energy and Environment: Synergistic Effects for Efficient Photocatalysis

Chen

Cheng

Lai

et al. 2023

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Among all possible options, semiconductor photocatalytic technology is considered as an environmentally friendly and ideal strategy among all possible options and has been rapidly developed around the world. [5][6][7][8][9] Since the first report of artificial photocatalysis in 1972 by Fujishima et al., traditional TiO 2 has been widely used because of its intrinsic photocatalytic performance, low toxicity, and thermodynamic stability. [10][11][12] However, TiO 2 can be only photogenerated under ultraviolet light (UV-light), limiting its utilization efficiency of solar energy. [13,14] Accordingly, researchers are actively searching for photocatalysts with excellent visible light response and satisfactory photocatalytic performance. [15][16][17] Graphitic carbon nitride (g-C 3 N 4 ) is a metal-free nanomaterial composing of C and N with a defect-N bridges of s-triazine or tri-s-triazine (Figure 1A,B). [19,20] The history of C 3 N 4 could be traced back to 1834, but g-C 3 N 4 was not formally proposed until 1996 by Teter and Hemley, probably due to its high stability and mysterious structure. [21] Subsequently, g-C 3 N 4 has emerged as an encouraging candidate for photocatalysts based on its moderate bandgap, suitable energy band structure (Figure 1C), visible light absorption and high stability, as well as been widely concerned by countries all over the world. [18,[22][23][24] Since the photocatalytic H 2 evolution of g-C 3 N 4 was first reported in 2009, the research on improving the photocatalytic performance of g-C 3 N 4 -based photocatalysts has gradually become a popular research direction (Figure 2). [18,25,26] Pristine g-C 3 N 4 can be prepared by using the heat treatment of some low-cost nitrogen-rich organic precursors, such as urea, melamine, dicyandiamide, and so on. [27] However, their practical applications have been limited by several shortcomings of pristine g-C 3 N 4 , including low specific surface area, insufficient utilization of visible light (< 460 nm), and rapid recombination of photogenerated electron-hole (e − -h + ) pairs. [28,29] For the sake of overcoming these challenges, many methods have been employed to modify g-C 3 N 4 to improve the photocatalytic activity, such as element/heteroatomic doping, [30] structural design, [31,32] and heterojunction construction. [33][34][35] Among the recent progresses of modifying g-C 3 N 4 , heterojunctions formed Recently, graphitic carbon nitride (g-C 3 N 4 ) has attracted increasing interest due to its visible light absorption, suitable energy band structure, and excellent stability. However, low specific surface area, finite visible light response range (<460 nm), and rapid photogenerated electron-hole (e − -h + ) pairs recombination of the pristine g-C 3 N 4 limit its practical applications. The small size of quantum dots (QDs) endows the properties of abundant active sites, wide absorption spectrum, and adjustable bandgap, but inevitable aggregation. Studies have confirmed that the integration of g-C 3 N 4 and QDs not only overcomes these limita...

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“…The CSZS-V Zn heterojunction exhibited a H 2 evolution rate of 46.63 mmol h −1 g −1 under visible light illumination in an aqueous Na 2 S/Na 2 SO 3 system, which was about 388 and 1727 times higher than those of CdS and Zn-vacancy ZnS, respectively. Bi et al 127 successfully fabricated a novel 0D/2D TiO 2 /g-C 3 N 4 S-type heterostructure with vacancy defects using a multi-step assembly strategy. The vacancy defect TiO 2 quantum dots can form an S-shaped charge transfer path in TiO 2 -O V /g-C 3 N 4 , which greatly improved the redox ability of carriers, enhanced the charge transfer and separation on the interface, and promoted the adsorption and dissociation of water.…”

Section: Engineering Of Heterojunction Interfacementioning

confidence: 99%

Engineering interface structures for heterojunction photocatalysts

Lin

Chen

Zhang

et al. 2023

Phys. Chem. Chem. Phys.

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Vacancy-defect semiconductor quantum dots induced an S-scheme charge transfer pathway in 0D/2D structures under visible-light irradiation

Cited by 67 publications

References 56 publications

Construction of Janus-structured ZnO@ZIF-8(-NH₂)/cellulose nanofiber foam for highly efficient adsorption and photocatalysis-assisted desorption of tetracycline

Construction of Janus-structured ZnO@ZIF-8(-NH₂)/cellulose nanofiber foam for highly efficient adsorption and photocatalysis-assisted desorption of tetracycline

The Collision between g‐C₃N₄ and QDs in the Fields of Energy and Environment: Synergistic Effects for Efficient Photocatalysis

Engineering interface structures for heterojunction photocatalysts

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Vacancy-defect semiconductor quantum dots induced an S-scheme charge transfer pathway in 0D/2D structures under visible-light irradiation

Cited by 67 publications

References 56 publications

Construction of Janus-structured ZnO@ZIF-8(-NH2)/cellulose nanofiber foam for highly efficient adsorption and photocatalysis-assisted desorption of tetracycline

Construction of Janus-structured ZnO@ZIF-8(-NH2)/cellulose nanofiber foam for highly efficient adsorption and photocatalysis-assisted desorption of tetracycline

The Collision between g‐C3N4 and QDs in the Fields of Energy and Environment: Synergistic Effects for Efficient Photocatalysis

Engineering interface structures for heterojunction photocatalysts

Contact Info

Product

Resources

About

Construction of Janus-structured ZnO@ZIF-8(-NH₂)/cellulose nanofiber foam for highly efficient adsorption and photocatalysis-assisted desorption of tetracycline

Construction of Janus-structured ZnO@ZIF-8(-NH₂)/cellulose nanofiber foam for highly efficient adsorption and photocatalysis-assisted desorption of tetracycline

The Collision between g‐C₃N₄ and QDs in the Fields of Energy and Environment: Synergistic Effects for Efficient Photocatalysis