By Nitrogen Doped Graphene (NDG) is a promising material for a variety of applications. This material is made from a carbon nanotube that is doped with nitrogen. This material is extremely light and strong and is extremely resistant to high temperatures. It has many applications in energy storage devices, batteries, and sensors.
Graphene-doped graphene
The splitting of the XPS signal in N-doped graphene is a characteristic feature of N-related defects. This splitting corresponds to energy level shifts on the nitrogen atom, which bridges two graphene layers. These defects have not previously been observed in graphene monolayers.
Nitrogen-doped graphene can reinforce rubber properties and improve electrical and mechanical properties. N doping increases the interfacial interactions and creates a more hydrophilic surface. It also increases the permeability of a hollow-fiber polymer membrane.
Researchers have synthesized nitrogen-doped graphene quantum dots by using a microwave-assisted hydrothermal method. Then, they subjected these NGQDs to controlled ozone treatments.
The oxygen functional groups present on the surface result in defects. The graphene sample consists of two to three layers. Nitrogen doping intensifies the wrinkled surface of graphene by introducing N atoms into the graphene.
The incorporation of nitrogen into graphene aerogel improves electrochemical and electron transfer properties. The resulting material is suitable as a sensing platform for dopamine and ascorbic acid. This research has several promising implications in the field of biosensors. For instance, it may improve the detection of biologically relevant analytes in human blood and other bodily fluids.
Nitrogen-doped graphene shows greater reactivity to oxygen due to the presence of nitrogen. These defects may affect the electronic and mechanical properties of graphene. Therefore, it may be a better candidate for supercapacitors than N-doped graphene.
Graphene-doped graphene aerogel
A self-supported lithium polysulfide battery cathode was recently developed using graphene-doped graphene-aerogel materials. This material exhibits excellent cycling stability, high specific capacity, and low initial charge voltage. This new material’s cross-linked porous structure is thought to be the key factor in its improved performance. It also has a strong affinity for Li2S and a low energy barrier.
This composite material shows great potential as a high-quality electrode for LIBs. Moreover, it does not require cross-linking. As a result, the rGO/BN aerogel is an excellent alternative to silicon-based electrodes. It also exhibits high electrical conductivity and a large surface area.
Another major advantage of nitrogen doped graphene aerogel is its chemical stability. In addition to its high conductivity and incredible wettability, graphene-doped aerogels have outstanding electrochemical and energy storage properties. Moreover, they are highly durable and have a shelf-life of one year.
These materials are composed of graphene sheets with an average width of ten microns. The walls of NG/Fe3O4 aerogels have pores whose average size is a few tens of microns. Their pores are much larger than those of RGO/Fe3O4.
Graphene quantum dots
Graphene quantum dots doped with sulfur and nitrogen exhibit excellent optical and fluorescence properties. N-GQDs show a bright violet-blue luminescence when exposed to ultraviolet light. The emission wavelength is independent of the excitation wavelength, which ranges from 285 nm to 415 nm. Furthermore, N-GQDs exhibit a high FLQY of 345 nm under UV illumination using quinine sulfite as a standard.
The absorption spectra of N-GQDs show a blue shift in the UV-visible region, which indicates the formation of a new complex. The carboxyl group of graphene quantum dots and the sulfonic group of brilliant blue have high electronegativity, which means that they form a complex through a hydrogen bond.
X-ray diffraction and X-ray spectroscopy showed a linear relationship between analyte concentration and the GQDs’ height. However, it is still unclear how nitrogen-doped graphene interacts with brilliant blue.
The researchers also examined N-GQDs in deionized water (DI water) and in a culture medium. They found that their hydrodynamic dimeters in DI water and culture medium were similar and their sizes were comparable to those measured using a TEM. They also noted that their UV-Vis absorption peaks were in the blue spectral range and the emission peaks were red.
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