Synthesis of Carbon Dots on Fe<sub>3</sub>O<sub>4</sub> Nanoparticles as Recyclable Visible-Light Photocatalysts

Juang, Ruey‐Shin; Ju, Yin-Cheng; Liao, Chien‐Shiun; Lin, Kuen‐Song; Lu, Hsi-Chuan; Wang, Sea-Fue; Sun, Andy

doi:10.1109/tmag.2017.2710541

Cited by 11 publications

(2 citation statements)

References 15 publications

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“…It may have corresponded to the C–O functional group, which suggested the conjugation of C atom with O atoms (from SiO 2 and/or TiO 2 ; inner and outer nanocomposite layers) by a covalent bond. This C-O stretching vibration represented the conjugation of C-dots on the surface of the synthesized Co x Ni 1−x Fe 2 O 4 ; x = 0.9/SiO 2 /TiO 2 nanocomposite 84 , 85 . Our FTIR results were similar to some recently-published research studies 86 – 89 .…”

Section: Resultsmentioning

confidence: 97%

Carbon-dot-loaded CoxNi1−xFe2O4; x = 0.9/SiO2/TiO2 nanocomposite with enhanced photocatalytic and antimicrobial potential: An engineered nanocomposite for wastewater treatment

Elkodous

El-Sayyad

Youssry

et al. 2020

Sci Rep

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Water scarcity is now a serious global issue resulting from population growth, water decrease, and pollution. Traditional wastewater treatment plants are insufficient and cannot meet the basic standards of water quality at reasonable cost or processing time. In this paper we report the preparation, characterization and multiple applications of an efficient photocatalytic nanocomposite (Co x Ni 1−x Fe 2 O 4 ; x = 0.9/SiO 2 /TiO 2 /C-dots) synthesized by a layer-by-layer method. Then, the photocatalytic capabilities of the synthesized nanocomposite were extensively-studied against aqueous solutions of chloramine-T trihydrate. In addition, reaction kinetics, degradation mechanism and various parameters affecting the photocatalytic efficiency (nanocomposite dose, chloramine-T initial concentration, and reaction pH) were analyzed in detail. Further, the antimicrobial activities of the prepared nanocomposite were tested and the effect of UV-activation on the antimicrobial abilities of the prepared nanocomposite was analyzed. Finally, a comparison between the antimicrobial abilities of the current nanocomposite and our previously-reported nanocomposite (Co x Ni 1−x Fe 2 O 4 ; x = 0.9/SiO 2 /TiO 2 ) had been carried out. Our results revealed that the prepared nanocomposite possessed a high degree of crystallinity, confirmed by XRD, while UV–Vis. recorded an absorption peak at 299 nm. In addition, the prepared nanocomposite possessed BET-surface area of (28.29 ± 0.19 m 2 /g) with narrow pore size distribution. Moreover, it had semi-spherical morphology, high-purity and an average particle size of (19.0 nm). The photocatalytic degradation efficiency was inversely-proportional to chloramine-T initial concentration and directly proportional to the photocatalyst dose. In addition, basic medium (pH 9) was the best suited for chloramine-T degradation. Moreover, UV-irradiation improved the antimicrobial abilities of the prepared nanocomposite against E. coli , B. cereus , and C. tropicalis after 60 min. The observed antimicrobial abilities (high ZOI, low MIC and more efficient antibiofilm capabilities) were unique compared to our previously-reported nanocomposite. Our work offers significant insights into more efficient water treatment and fosters the ongoing efforts looking at how pollutants degrade the water supply and the disinfection of water-borne pathogenic microorganisms.

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Section: Resultsmentioning

confidence: 97%

Carbon-dot-loaded CoxNi1−xFe2O4; x = 0.9/SiO2/TiO2 nanocomposite with enhanced photocatalytic and antimicrobial potential: An engineered nanocomposite for wastewater treatment

Elkodous

El-Sayyad

Youssry

et al. 2020

Sci Rep

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“…Among these, advanced oxidation processes based on photocatalysis systems have attracted more attention from the research community, in which the dyes are converted into non-toxic and simple molecules [8]. Photocatalysis transfers organic wastes into CO 2 and H 2 O by interacting with the gain and loss of electrons [13]. Metal oxide semiconductors are commonly used as photocatalysts because of their large band gap [14].…”

Section: Introductionmentioning

confidence: 99%

Visible Light-Induced Photocatalytic Degradation of Methylene Blue Using Copper-Doped Carbon Dots One-Step Derived from CCA-Wood

Xing,

Zhang,

Magdouli

et al. 2024

Forests

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Developing novel eco-friendly broad-spectrum visible light photocatalysts for dye removal is one of the urgent problems for water treatment. Here, copper-doped carbon dots (CDs) were reported to be directly fabricated from chromated copper arsenate (CCA) wood waste for the photocatalytic degradation of the methylene blue dye. The properties of the resulting CDs were thoroughly characterized and analyzed, preceding an investigation into the adsorption kinetics of dye degradation. The kinetic study showed that reactant concentration was the rate-limiting factor. The obtained CDs showed a 151 mg/g photocatalytic degradation capacity. Comparing pure CDs to CDs/TiO2 composites, the former demonstrated higher photodegradation efficiency. This superiority can be attributed to the synergistic action of adsorption and photocatalytic degradation working in tandem. This study prepared Cu doped CDs and elucidated the photocatalysis mechanism of methylene blue degradation by CDs. The photodegradation of organic dyes through CDs derived from waste CCA wood emerges as an eco-friendly, facile, and highly efficient method.

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Preparation of highly efficient and magnetically recyclable Fe3O4@C@Ru nanocomposite for the photocatalytic degradation of methylene blue in visible light

Zhang

et al. 2019

Applied Surface Science

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Synthesis of Carbon Dots on Fe₃O₄ Nanoparticles as Recyclable Visible-Light Photocatalysts

Cited by 11 publications

References 15 publications

Carbon-dot-loaded CoxNi1−xFe2O4; x = 0.9/SiO2/TiO2 nanocomposite with enhanced photocatalytic and antimicrobial potential: An engineered nanocomposite for wastewater treatment

Carbon-dot-loaded CoxNi1−xFe2O4; x = 0.9/SiO2/TiO2 nanocomposite with enhanced photocatalytic and antimicrobial potential: An engineered nanocomposite for wastewater treatment

Visible Light-Induced Photocatalytic Degradation of Methylene Blue Using Copper-Doped Carbon Dots One-Step Derived from CCA-Wood

Preparation of highly efficient and magnetically recyclable Fe3O4@C@Ru nanocomposite for the photocatalytic degradation of methylene blue in visible light

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Synthesis of Carbon Dots on Fe3O4 Nanoparticles as Recyclable Visible-Light Photocatalysts

Cited by 11 publications

References 15 publications

Carbon-dot-loaded CoxNi1−xFe2O4; x = 0.9/SiO2/TiO2 nanocomposite with enhanced photocatalytic and antimicrobial potential: An engineered nanocomposite for wastewater treatment

Carbon-dot-loaded CoxNi1−xFe2O4; x = 0.9/SiO2/TiO2 nanocomposite with enhanced photocatalytic and antimicrobial potential: An engineered nanocomposite for wastewater treatment

Visible Light-Induced Photocatalytic Degradation of Methylene Blue Using Copper-Doped Carbon Dots One-Step Derived from CCA-Wood

Preparation of highly efficient and magnetically recyclable Fe3O4@C@Ru nanocomposite for the photocatalytic degradation of methylene blue in visible light

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Synthesis of Carbon Dots on Fe₃O₄ Nanoparticles as Recyclable Visible-Light Photocatalysts