Photocatalytic activity study of ZnO modified with nitrogen–sulfur co-doped carbon quantum dots under visible light

Liu, Huadong; Li, Hewei; Du, Kezhen; Xu, Haoxuan

doi:10.1039/d2nj02562k

Cited by 10 publications

(6 citation statements)

References 65 publications

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“…Liu et al [194] introduced visible-light-responsive N and S codoped CQDs to modify ZnO composites. The incorporation of N, S-doped CQDs not only reduced the bandgap of ZnO but also harnessed long-wavelength light, converting it into short-wavelength photons to generate electron-hole pairs within the ZnO structure.…”

Section: Cqds-zno Photocatalystmentioning

confidence: 99%

“…This review has provided an extensive overview of the synthesis methods, textural and fluorescent properties, and modification strategies of CQDs across diverse technological applications, including biomedicine, fluorescent sensors, lighting and display, latent fingerprint [194] Reproduced with permission: Copyright 2022, Royal Society of Chemistry. CQD, carbon quantum dot; SEM, scanning electron microscopy; TEM, transmission electron microscopy.…”

Section: Conclusion and Future Perspectivementioning

confidence: 99%

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Fluorescent carbon quantum dots with controllable physicochemical properties fantastic for emerging applications: A review

You,

Zou,

Jiang

et al. 2024

Carbon Neutralization

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Carbon quantum dots (CQDs) have emerged as prominent contenders in the realm of luminescent nanomaterials over the past decade owing to their tunable optical properties, robust photostability, versatile surface functionalization and doping potential, low toxicity, and straightforward synthesis utilizing environmentally friendly precursors. In this review, we commence with a concise introduction, presenting both top‐down and bottom‐up strategies for the eco‐friendly synthesis of CQDs. Subsequently, we delve into a comprehensive examination of CQDs' structure and optical characteristics, encompassing their ultraviolet–visible absorption properties, surface confinement effects, and surface state emissions contributing to room‐temperature photoluminescence (PL). This review proceeds to elucidate recent advancements in modification strategies for CQDs, specifically focusing on surface oxidation, passivation, and the incorporation of heteroatoms. These strategies serve to afford control over the physicochemical properties, facilitating the enhancement of PL through the decoration of highly visible‐responsive CQDs. This enhancement is achieved by suppressing the nonradiative recombination of electron‐hole pairs, enabling red/blue shifts in CQDs for the generation of a full‐color emission spectrum, and regulating the band‐gap and surface states to broaden the photoabsorption range. Finally, we offer an overview of the most recent developments in the applications of fluorescent CQDs, emphasizing their utility in biomedicine, fluorescent sensors, lighting, and displays, as well as photocatalysis.

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Section: Cqds-zno Photocatalystmentioning

confidence: 99%

Section: Conclusion and Future Perspectivementioning

confidence: 99%

Fluorescent carbon quantum dots with controllable physicochemical properties fantastic for emerging applications: A review

You,

Zou,

Jiang

et al. 2024

Carbon Neutralization

View full text Add to dashboard Cite

show abstract

“…This property makes them candidates for the development of new catalysts in combination with other photocatalysts. Liu et al [73] synthesized new visible light responsive CDs-33 by solvothermal method. Then ZnO/CDs-33 composites were prepared by impregnation.…”

Section: Zno-based Photocatalystsmentioning

confidence: 99%

Design and Fabrication of Carbon Dots/Semiconductor Photocatalysts with Superior Photocatalytic Activity: A Review

Zhang,

Yan,

Wang

et al. 2023

Part & Part Syst Charact

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Semiconductor photocatalysts are being recognized as innovative materials for enhancing water quality and environmental optimization. Nevertheless, the limited activity and quick electron–hole pair recombination under visible light have hindered their widespread use in photocatalysis. Nanomaterials based on carbon dots (CDs) show promising applications due to their excellent light absorption ability. Notably, CDs/semiconductor photocatalysts have emerged as advanced photocatalytic materials. This review summarizes strategies to improve the performance of conventional semiconductor photocatalysts by incorporating CDs. These include TiO2, g‐C3N4, Bi‐based, Cu2O, and ZnO photocatalysts. Various effective synthesis routes for composites are discussed, including morphology optimization, heteroatom doping, heterojunction building, and creation of polymeric hybrids. Ultimately, the challenges and future prospects of CDs/semiconductor photocatalysts are discussed.

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“…[9][10][11] In numerous studies, doping with other elements is a common choice for augmenting the photocatalytic activity of semiconductors. 12,13 The doped particles, especially the metal nanoparticles, can absorb and retain light energy in the form of high-energy electrons. 14 These electrons can later transfer the energy to adjacent particles to facilitate photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic performance of ZnO under visible light by co-doping of Ta and C using hydrothermal method

Luu,

Nguyen,

Nguyen

et al. 2024

RSC Adv.

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Photocatalytic activity study of ZnO modified with nitrogen–sulfur co-doped carbon quantum dots under visible light

Abstract: The development of high-efficiency photocatalytic materials responsive to visible light is one of the most effective ways to address the environmental threats posed by organic dyes in industrial wastewater. In...

Cited by 10 publications

References 65 publications

Fluorescent carbon quantum dots with controllable physicochemical properties fantastic for emerging applications: A review

Fluorescent carbon quantum dots with controllable physicochemical properties fantastic for emerging applications: A review

Design and Fabrication of Carbon Dots/Semiconductor Photocatalysts with Superior Photocatalytic Activity: A Review

Enhanced photocatalytic performance of ZnO under visible light by co-doping of Ta and C using hydrothermal method

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