Electrostatically assembled carbon dots/boron nitride nanosheet hybrid nanostructures for thermal quenching-resistant white phosphors

Cheng, Siwei; Ye, Tengyang; Mao, Huiwu; Wu, Yueyue; Jiang, Wenjie; Ban, Chaoyi; Yin, Yuhang; Liu, Juqing; Xiu, Fei; Huang, Wei

doi:10.1039/c9nr07785e

Cited by 23 publications

(8 citation statements)

References 39 publications

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“…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: Resultssupporting

confidence: 92%

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: Resultssupporting

confidence: 92%

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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“…[ 25–27 ] The good thermal conductivity of h‐BN favors heat dissipation and reduces heat‐induced damage in heterojunctions. [ 28,29 ] Furthermore, h‐BN layers are an outstanding encapsulant and gate dielectric for hetero‐bilayers in van der Waals 2D materials. [ 6,30 ] In addition to the contribution of h‐BN, the hetero‐counterpart can also enhance some h‐BN properties such as quantum emitting and optical sensing.…”

Section: Introductionmentioning

confidence: 99%

2D Boron Nitride Heterostructures: Recent Advances and Future Challenges

Ren

Innocenzi

2021

Small Structures

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Hexagonal boron nitride (h‐BN) is one of the most attractive 2D materials because of its remarkable properties. Combining h‐BN with other components (e.g., graphene, carbonitride, semiconductors) to form heterostructures opens new perspectives to developing advanced functional devices. In this review, the state‐of‐the‐art in h‐BN heterojunctions is highlighted. The preparation of high‐quality 2D h‐BN structures with fewer defects can maximize its intrinsic properties, such as thermal conductivity and electrical insulation, which are particularly important in 2D van der Waals electronics. On the other hand, the controlled introduction in 2D h‐BN of multiple defects creates new properties and advanced functions. In this last case, only through a better understanding of the nature and function of defects, it is possible to develop advanced applications based on h‐BN heterostructures. Engineering of the heterojunctions, such as the design of bonding at the interfaces, also plays a primary role. Several applications are proposed for h‐BN heterostructures, mostly in sensing and photocatalysis, and some new perspectives worth further studies are opened. Finally, the current challenges and the rising opportunities for the future developments of next‐generation h‐BN heterostructures are discussed.

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“…Li et al combined MOFs and CDs by embedding the CDs into the MOF structure or by decorating the MOF surface with CDs in order to assess which approach is more favorable for charge separation and transfer [ 150 ]. Cheng et al electrostatically assembled CDs with boron nitride nanosheets that exhibit thermal quenching resistance and white luminescence [ 151 ]. Finally, Jiang et al embedded CDs in a boric acid and urea matrix using microwave heating which exhibited afterglow properties [ 152 ].…”

Section: Strategies For Cds Synthesismentioning

confidence: 99%

Applications of Carbon Dots for the Photocatalytic and Electrocatalytic Reduction of CO2

et al. 2022

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The photocatalytic and electrocatalytic conversion of CO2 has the potential to provide valuable products, such as chemicals or fuels of interest, at low cost while maintaining a circular carbon cycle. In this context, carbon dots possess optical and electrochemical properties that make them suitable candidates to participate in the reaction, either as a single component or forming part of more elaborate catalytic systems. In this review, we describe several strategies where the carbon dots participate, both with amorphous and graphitic structures, in the photocatalysis or electrochemical catalysis of CO2 to provide different carbon-containing products of interest. The role of the carbon dots is analyzed as a function of their redox and light absorption characteristics and their complementarity with other known catalytic systems. Moreover, detailed information about synthetic procedures is also reviewed.

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Electrostatically assembled carbon dots/boron nitride nanosheet hybrid nanostructures for thermal quenching-resistant white phosphors

Abstract: C-dots/BNNS white-emitting phosphors with thermal quenching resistance are prepared by assembling C-dots onto the BNNS surface through electrostatic assembly.

Cited by 23 publications

References 39 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

2D Boron Nitride Heterostructures: Recent Advances and Future Challenges

Applications of Carbon Dots for the Photocatalytic and Electrocatalytic Reduction of CO2

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