In this research, we report a facile method for synthesizing a series of carboxyl functionalized graphene quantum dots (GQDs) using graphite flakes (300 meshes) as raw material.

2023年10月3日 · Graphene Quantum Dots (GQDs), a brand-new class of luminous zero-dimensional materials, due to their distinct optical characteristics, size and quantum confinement, superior biocompatibility, minimal cytotoxicity and customizable fluorescence properties, graphene quantum dots (GQDs) have demonstrated significant potential in various applications.

Comprehensive characterization of graphene quantum dots (GQDs): (a) UV-Vis absorption spectrum illustrating the primary absorption features, (b) Fourier Transform Infrared (FTIR) spectrum identifying specific functional groups, (c) X-ray diffraction (XRD) pattern indicating crystallinity and structural order, (d) Scanning Electron Microscopy ...

2021年9月6日 · Here, we report that the functionalized graphene quantum dots can direct CO 2 to CH 4 conversion with simultaneous high selectivity and production rate. The electron-donating groups facilitate the...

2019年9月1日 · Graphene quantum dots (GQDs) are a novel, zero-dimensional nanomaterial made from graphene. GQDs are small graphene fragments, with particle sizes in the range of 3–20 nm, and favourable surface grafting that involves π–π conjugations (Benítez-Martínez and Valcárcel, 2015, Kuo et al., 2016).

2020年12月4日 · Graphene quantum dots (GQDs), a novel type of zero-dimensional fluorescent materials, have gained considerable attention owing to their unique optical properties, size...

2024年11月1日 · FTIR analysis of GQDs typically reveals peaks corresponding to various functional groups, such as hydroxyl (–OH), carboxyl (–COOH), amine (–NH 2), and carbonyl (C O) groups, among others. These functional groups play crucial roles in determining the surface chemistry, stability [174].

3 天之前 · Among the various DDSs, graphene quantum dot-hyaluronic acid (GQD-HA) nanocarriers, composed of conjugated GQDs and HA, are distinguished by their biocompatibility and capacity to facilitate ...

3 天之前 · Figure 2C, D demonstrate that under excitation light at a wavelength of 360 nm, both N-GQDs and N-GQDs-AuNP exhibit good luminescent properties, with emission peaks located at 425 nm and 434 nm, respectively. Next, FTIR was used to verify the surface functional group structure of N-GQDs and N-GQDs-AuNP.

N-GQDs, conductive carbon black, and polytetrafluoroethylene suspension (5 wt%) were dissolved in an appropriate amount of alcohol in a mass ratio of 8:1:1 and sonicated for 15 min. ... Fourier-transform infrared spectroscopy (FTIR, Tensor II, Bruker Optik GmbH, Ettlingen, Germany) and X-ray photoelectron spectroscopy (XPS, AXIS SUPRA, Shimadzu ...