Novel ternary photocatalyst of single atom-dispersed silver and carbon quantum dots co-loaded with ultrathin g-C3N4 for broad spectrum photocatalytic degradation of naproxen

Wang, Fengliang; Wang, Yingfei; Zeng, Yongqin; Xie, Zhijie; Zhang, Qianxin; Su, Yuehan; Chen, Ping; Liu, Yang; Yao, Kun; Lv, Wenying; Liu, Guoguang

doi:10.1016/j.apcatb.2017.09.055

Cited by 445 publications

(108 citation statements)

References 60 publications

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“…Compared with other samples, CdS/Pt/Mo 2 C-0.5 possesses apparent quantum yield of 9.39% (AQY ¼ 9.39%) under visible-light irradiation. 25,[28][29][30][31][32][33] Interestingly, upon further increasing the percent of Pt nanoparticles, the rate for photocatalytic hydrogen generation decreases, which is probably due to the extra percent of Pt nanoparticles in the CdS/Pt/Mo 2 C system. The excessive Pt may act as the center of recombination, which has been proven by previous research.…”

Section: Resultsmentioning

confidence: 99%

Enhanced photocarriers separation of novel CdS/pt/Mo₂C heterostructure for visible-light-driven hydrogen evolution

et al. 2018

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Section: Resultsmentioning

confidence: 99%

Enhanced photocarriers separation of novel CdS/pt/Mo₂C heterostructure for visible-light-driven hydrogen evolution

et al. 2018

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“…For instance, Chen et al used silver tricyanomethanide (AgTCM) and cyanamide as the starting molecular precursors and successfully obtained graphitic carbon nitride (C 3 N 4 ) nanosheets doped with individual Ag atoms (Figure d). Wang et al synthesized C 3 N 4 ‐based SACs co‐loaded with Ag single atoms and carbon quantum dots. Gao et al pyrolyzed [Cu 2 Cl 2 (µ‐Cl)(µ‐OCH 3 )(CH 3 OH)(MA) 2 • 2Et 2 O] (MA = melamine) and obtained Cu SACs on C 3 N 4 .…”

Section: Sample Preparationmentioning

confidence: 99%

Carbon‐Supported Single Atom Catalysts for Electrochemical Energy Conversion and Storage

2018

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Single atoms of select transition metals supported on carbon substrates have emerged as a unique system for electrocatalysis because of maximal atom utilization (≈100%) and high efficiency for a range of reactions involved in electrochemical energy conversion and storage, such as the oxygen reduction, oxygen evolution, hydrogen evolution, and CO reduction reactions. Herein, the leading strategies for the preparation of single atom catalysts are summarized, and the electrocatalytic performance of the resulting samples for the various reactions is discussed. In general, the carbon substrate not only provides a stabilizing matrix for the metal atoms, but also impacts the electronic density of the metal atoms due to strong interfacial interactions, which may lead to the formation of additional active sites by the adjacent carbon atoms and hence enhanced electrocatalytic activity. This necessitates a detailed understanding of the material structures at the atomic level, a critical step in the construction of a relevant structural model for theoretical simulations and calculations. Finally, a perspective is included highlighting the promises and challenges for the future development of carbon-supported single atom catalysts in electrocatalysis.

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“…Their group further enhanced the efficiency of CD/g-C 3 N 4 through the incorporation of single-atom-dispersed silver. The optimum amount of Ag (3.0 wt %) and CDs (1.0 wt %) resulted in a 10-fold higher degradation rate of naproxen [40]. Much of the work on g-C 3 N 4 has been reported for environmental and energy remediation [41–42].…”

Section: Introductionmentioning

confidence: 99%

Sugarcane juice derived carbon dot–graphitic carbon nitride composites for bisphenol A degradation under sunlight irradiation

Sim

Wong

Hak

et al. 2018

Beilstein J. Nanotechnol.

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Carbon dots (CDs) and graphitic carbon nitride (g-C3N4) composites (CD/g-C3N4) were successfully synthesized by a hydrothermal method using urea and sugarcane juice as starting materials. The chemical composition, morphological structure and optical properties of the composites and CDs were characterized using various spectroscopic techniques as well as transmission electron microscopy. X-ray photoelectron spectroscopy (XPS) results revealed new signals for carbonyl and carboxyl groups originating from the CDs in CD/g-C3N4 composites while X-ray diffraction (XRD) results showed distortion of the host matrix after incorporating CDs into g-C3N4. Both analyses signified the interaction between g-C3N4 and CDs. The photoluminescence (PL) analysis indicated that the presence of too many CDs will create trap states at the CD/g-C3N4 interface, decelerating the electron (e−) transport. However, the CD/g-C3N4(0.5) composite with the highest coverage of CDs still achieved the best bisphenol A (BPA) degradation rate at 3.87 times higher than that of g-C3N4. Hence, the charge separation efficiency should not be one of the main factors responsible for the enhancement of the photocatalytic activity of CD/g-C3N4. Instead, the light absorption capability was the dominant factor since the photoreactivity correlated well with the ultraviolet–visible diffuse reflectance spectra (UV–vis DRS) results. Although the CDs did not display upconversion photoluminescence (UCPL) properties, the π-conjugated CDs served as a photosensitizer (like organic dyes) to sensitize g-C3N4 and injected electrons to the conduction band (CB) of g-C3N4, resulting in the extended absorption spectrum from the visible to the near-infrared (NIR) region. This extended spectral absorption allows for the generation of more electrons for the enhancement of BPA degradation. It was determined that the reactive radical species responsible for the photocatalytic activity were the superoxide anion radical (O2 •−) and holes (h+) after performing multiple scavenging tests.

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Novel ternary photocatalyst of single atom-dispersed silver and carbon quantum dots co-loaded with ultrathin g-C3N4 for broad spectrum photocatalytic degradation of naproxen

Cited by 445 publications

References 60 publications

Enhanced photocarriers separation of novel CdS/pt/Mo₂C heterostructure for visible-light-driven hydrogen evolution

Enhanced photocarriers separation of novel CdS/pt/Mo₂C heterostructure for visible-light-driven hydrogen evolution

Carbon‐Supported Single Atom Catalysts for Electrochemical Energy Conversion and Storage

Sugarcane juice derived carbon dot–graphitic carbon nitride composites for bisphenol A degradation under sunlight irradiation

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Novel ternary photocatalyst of single atom-dispersed silver and carbon quantum dots co-loaded with ultrathin g-C3N4 for broad spectrum photocatalytic degradation of naproxen

Cited by 445 publications

References 60 publications

Enhanced photocarriers separation of novel CdS/pt/Mo2C heterostructure for visible-light-driven hydrogen evolution

Enhanced photocarriers separation of novel CdS/pt/Mo2C heterostructure for visible-light-driven hydrogen evolution

Carbon‐Supported Single Atom Catalysts for Electrochemical Energy Conversion and Storage

Sugarcane juice derived carbon dot–graphitic carbon nitride composites for bisphenol A degradation under sunlight irradiation

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Enhanced photocarriers separation of novel CdS/pt/Mo₂C heterostructure for visible-light-driven hydrogen evolution

Enhanced photocarriers separation of novel CdS/pt/Mo₂C heterostructure for visible-light-driven hydrogen evolution