In-situ synthesis of reduced graphene oxide decorated with highly dispersed ferromagnetic CdS nanoparticles for enhanced photocatalytic activity under UV irradiation

Kumar, Surendra; Ojha, Animesh K.

doi:10.1016/j.matchemphys.2015.12.008

Cited by 47 publications

(13 citation statements)

References 49 publications

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“…Also, the G-CDs show a broad diffraction pattern at 20.24°, representing the (002) plane with a higher interlayer d spacing. The broad nature of the XRD pattern in the G-CDs signifies lower layers of graphene sheets …”

Section: Resultsmentioning

confidence: 99%

Multicolor-Emissive Carbon Dots for White-Light-Emitting Diodes and Room-Temperature Phosphorescence

Kumari

Kumar

Negi

et al. 2023

ACS Appl. Nano Mater.

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Multicolor tuning is one of the most remarkable features of carbon dots (CDs), used as a color convertor in making white-light-emitting diodes (WLEDs). Herein, a solvent-controlled method has been employed to prepare the multicolor-emissive CDs from 1,2,4-triaminobenzene and melamine, where the green-, orange-, and red-color-emissive carbon dots (G-, O-, and R-CDs) have been synthesized in acetone, water, and dimethylformamide (DMF), respectively. It has noted that the reaction solvent has impacted the growth of the particle size, elemental concentration, surface functionalization, and ultimately fluorescence emission. To avoid aggregation quenching emission (AQE), fluorescent polymeric films have been shaped by mixing poly(methyl methacrylate) (PMMA) with R-and G-CDs, while O-CDs was made with poly(vinyl alcohol) (PVA). Interestingly, PVA exhibited red-shifted emission of O-CDs from 585 to 597 nm in O-CDs/ PVA, while PMMA accompanied a blue-shifting emission. The enriched nitrogen and oxygen elemental contents, especially the graphitic N of O-CDs/PVA, and hydrogen-bonding affinity of PVA cause the red-shifted emission of O-CDs/PVA. Fluorescent solid films have been used to develop monochromatic and white-color-emissive light-emitting diodes. Further, all of the synthesized CDs served as carbon precursors to develop room-temperature phosphorescence (RTP) by a molten salt method, where only R-and O-CDs achieved their RTP emissions with different intensities. The mechanism behind the RTP formation with particular CDs and their emission intensity dependency has been studied by the C�O moieties.

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Section: Resultsmentioning

confidence: 99%

Multicolor-Emissive Carbon Dots for White-Light-Emitting Diodes and Room-Temperature Phosphorescence

Kumari

Kumar

Negi

et al. 2023

ACS Appl. Nano Mater.

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“…The defects include carbenes, benzynes, phenylene units, topological defects, and zigzag edges. The increased value of H C is also observed for reduced GO–CdS and Ni@G nanostructures . Compared to only-chalcogenide materials, graphene-based chalcogenide materials have high potential for use as high-density information storage devices .…”

Section: Resultsmentioning

confidence: 89%

Study of Optical and Magnetic Properties of Graphene-Wrapped ZnO Nanoparticle Hybrids

Jana

Scheer

2018

Langmuir

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In this work, we report a one-step method for the preparation of graphene-wrapped zinc oxide (ZnO) nanoparticle (NP) (ZnO@G) hybrids. These hybrids are characterized by transmission electron microscopy, X-ray diffraction, Raman spectroscopy, optical absorption measurements, photoluminescence (PL) emission spectroscopy, and M-H hysteresis measurements. All results reveal that the ZnO NPs are entirely covered with graphene sheets. In the PL spectra, the quenching of the band gap emission and the enhanced green emission serve as evidence of the electron transfer from the ZnO NPs to the graphene layer. The increase of the room-temperature magnetization of the hybrid, compared to pure ZnO NPs, is due to the increasing defect concentration. We suggest a band diagram model that accounts for these observations. We present the simple wet-chemical synthesis procedure to open a new way for the synthesis of NP-graphene hybrid systems having magnetic properties giving the large manifold potential application.

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“…A new peak at 300 nm could be resolved, corresponding to the 1LO modes of as-deposited CdS QDs. [37] It should be noted that the presence of the trace amount of Mn 2+ dopant needs to be confirmed by more sensitive techniques such as Energy-dispersive X-ray sectors (EDS) and X-ray photoelectron spectroscopy (XPS), which will be provided in the latter discussion.…”

Section: Structural Characteristicsmentioning

confidence: 99%

Towards energy level cascaded “quantum armours” combating metal corrosion

Liu

Jin

Wang

et al. 2022

Applied Surface Science

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In-situ synthesis of reduced graphene oxide decorated with highly dispersed ferromagnetic CdS nanoparticles for enhanced photocatalytic activity under UV irradiation

Cited by 47 publications

References 49 publications

Multicolor-Emissive Carbon Dots for White-Light-Emitting Diodes and Room-Temperature Phosphorescence

Multicolor-Emissive Carbon Dots for White-Light-Emitting Diodes and Room-Temperature Phosphorescence

Study of Optical and Magnetic Properties of Graphene-Wrapped ZnO Nanoparticle Hybrids

Towards energy level cascaded “quantum armours” combating metal corrosion

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