Facile synthesis of a novel nitrogen-doped carbon dot adorned zinc oxide composite for photodegradation of methylene blue

Atchudan, Raji; Edison, Thomas Nesakumar Jebakumar Immanuel; Manivannan, Shanmugam; Perumal, Suguna; Vinodh, Rajangam; Somanathan, T.; Lee, Yong Rok

doi:10.1039/d0dt02756a

Cited by 75 publications

(31 citation statements)

References 78 publications

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“…reported N-CD decorated zinc oxide nanoparticles (N-CD@ ZnO) by a wet-impregnation method and used as a photocatalyst for the degradation of aqueous MB dye under UV-light. 150 Hu et al synthesized N-CQD (N-CQD) using different precursors with varying nitrogen contents and used in photocatalytic degradation of organic dyes such as indigo carmine (IC), ethyl violet (EV), CR, and bordeaux R (Bo-R). The degradation efficiency was 97% for IC under natural light for 2 h. 151 Chen et al developed a novel CQD modified potassium titanate nanotube (CQD/K 2 Ti 6 O 13 ) composite photocatalyst through hydrothermal treatment followed by calcination.…”

Section: Photocatalytic Applicationsmentioning

confidence: 99%

“…The results indicate that the activity of N-CD@ZnO composite slightly decreases the MB degradation from 99% to 95% after three runs. 150 Sui et al loaded CQD on TiO 2 nanosheets (CQD/TiO 2 -001) for visible light assisted photocatalytic activity for H 2 evolution from methanol aqueous solution under a 300 W xenon lamp irradiation. The cycling test results of the photocatalytic activity of synthesized CQD/ TiO 2 -001 for H 2 evolution was checked, and it was found that H 2 evolution rate is maintained even after eight cycles, supporting a great stability of the synthesized CQD/TiO 2 -001 in the photocatalytic H 2 evolution under the simulated solar light irradiation.…”

Section: Stability and Recyclability Studiesmentioning

confidence: 99%

“…This catalyst shows excellent photocatalytic performance in degradation of RhB which is ∼34.7 times higher than pristine g-C 3 N 4 . Atchudan et al reported N-CD decorated zinc oxide nanoparticles (N-CD@ZnO) by a wet-impregnation method and used as a photocatalyst for the degradation of aqueous MB dye under UV-light . Hu et al synthesized N-CQD (N-CQD) using different precursors with varying nitrogen contents and used in photocatalytic degradation of organic dyes such as indigo carmine (IC), ethyl violet (EV), CR, and bordeaux R (Bo-R).…”

Section: Photocatalytic Applicationsmentioning

confidence: 99%

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Visible-Light-Promoted Photocatalytic Applications of Carbon Dots: A Review

Saini

Garg

Dalal

et al. 2022

ACS Appl. Nano Mater.

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The same carbon-based nanomaterials have shown their potential photocatalytic applications toward environmental and energy-related problems based on their excellent light absorption abilities. Herein, we summarized the findings associated with visible light and sunlight-induced photocatalysis, specifically using carbon dots (CD), doped-CD, and their nanocomposite as an advanced photocatalytic material. Doped-CD and CD-based composite have improved light absorption abilities compared to bare CD, which is the essential parameter for photocatalysis applications. Various parameters, such as fabrication methodologies, efficiency, and stability, have also been discussed. The possible mechanistic insights involving the photocatalysis method applied in multiple chemical reactions have been discussed in detail, including degradation of organic dye, reduction of higher toxic oxidation states of metal ions, CO 2 conversion, water splitting, organic transformation reaction, and NOx removal, etc.

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Section: Photocatalytic Applicationsmentioning

confidence: 99%

Section: Stability and Recyclability Studiesmentioning

confidence: 99%

Section: Photocatalytic Applicationsmentioning

confidence: 99%

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Visible-Light-Promoted Photocatalytic Applications of Carbon Dots: A Review

Saini

Garg

Dalal

et al. 2022

ACS Appl. Nano Mater.

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“…Then N-CDs with the up-conversion properties convert the long-wavelength light to the short-wavelength light that can excite ZnO to form separate electrons and holes. During the degradation process of the MB dye, the π-π* interaction between N-CDs and the MB dye can enhance the degradation of MB by the N-CDs@ZnO photocatalyst [ 125 ]. The nitrogen-rich carbon nitride (p-C3N5) had exceptional electronic properties.…”

Section: Applications Of Cdsmentioning

confidence: 99%

Recent Advances in Synthesis, Modification, Characterization, and Applications of Carbon Dots

Pundi

Chang

2022

Polymers

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Although there is significant progress in the research of carbon dots (CDs), some challenges such as difficulty in large-scale synthesis, complicated purification, low quantum yield, ambiguity in structure-property correlation, electronic structures, and photophysics are still major obstacles that hinder the commercial use of CDs. Recent advances in synthesis, modification, characterization, and applications of CDs are summarized in this review. We illustrate some examples to correlate process parameters, structures, compositions, properties, and performances of CDs-based materials. The advances in the synthesis approach, purification methods, and modification/doping methods for the synthesis of CDs are also presented. Moreover, some examples of the kilogram-scale fabrication of CDs are given. The properties and performance of CDs can be tuned by some synthesis parameters, such as the incubation time and precursor ratio, the laser pulse width, and the average molar mass of the polymeric precursor. Surface passivation also has a significant influence on the particle sizes of CDs. Moreover, some factors affect the properties and performance of CDs, such as the polarity-sensitive fluorescence effect and concentration-dependent multicolor luminescence, together with the size and surface states of CDs. The synchrotron near-edge X-ray absorption fine structure (NEXAFS) test has been proved to be a useful tool to explore the correlation among structural features, photophysics, and emission performance of CDs. Recent advances of CDs in bioimaging, sensing, therapy, energy, fertilizer, separation, security authentication, food packing, flame retardant, and co-catalyst for environmental remediation applications were reviewed in this article. Furthermore, the roles of CDs, doped CDs, and their composites in these applications were also demonstrated.

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“…The N-CDs@ZnO composite showed a higher photocatalytic degradation activity of MB under UV irradiation, which was 2.3 times higher than that of pure ZnO nanoparticles. 43 Song et al 44 prepared NPCQD modified multi-shell ZnO microsphere photocatalysts (NPCQD/ZnO). Under simulated sunlight conditions, the photodegradation performance of 2g-NPCQD/ZnO composites for MB is better than that of pure ZnO.…”

Section: Introductionmentioning

confidence: 99%

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

Liu

et al. 2022

New J. Chem.

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Facile synthesis of a novel nitrogen-doped carbon dot adorned zinc oxide composite for photodegradation of methylene blue

Abstract: Nitrogen-doped carbon dot decorated zinc oxide nanoparticles were successfully fabricated by an economical wet-impregnation method and used as a photocatalyst for the degradation of aqueous methylene blue dye under UV-light at room temperature.

Cited by 75 publications

References 78 publications

Visible-Light-Promoted Photocatalytic Applications of Carbon Dots: A Review

Visible-Light-Promoted Photocatalytic Applications of Carbon Dots: A Review

Recent Advances in Synthesis, Modification, Characterization, and Applications of Carbon Dots

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

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