2020年11月30日 · The Raman spectra of the Nb 2 AlC, Nb 2 CT x, and c-Nb 2 O 5 /Nb 2 CT x-200 are shown in Fig. 3 b. The characteristic bands of Nb 2 O 5 at 233 cm −1 and 707 cm −1 represented the orthorhombic phase, indicating that Nb 2 O 5 existed in the three samples.

Raman spectroscopy analysis shown in Figure 3 provides additional insights into the bulk Nb2CTx. The bands observed at 258 cm -1 (associated with the bending modes of Nb-O-Nb linkages [4])...

2024年6月24日 · We conducted a comprehensive multiexcitation Raman study and observed nine Raman-active modes in Nb 2 CT x that are consistent with our density functional theory calculations. Additionally, we investigated laser-induced surface modification of Nb 2 CT x through changes in the peak intensities and frequencies, along with the generation of ...

2023年12月15日 · Micro Confocal Raman spectrometer was used to characterize the samples, and the corresponding Raman spectra were obtained. Brunauer-Emmett-Teller equation (BET) was used to calculate the surface area of the samples. X-ray Photoelectron Spectroscopy (XPS) was used to characterize the chemical state of the samples.

Raman spectroscopy analysis, depicted in Fig. 2 c, reveals that both LI-Nb 2 CT x and Nb 2 C/rGO exhibit broad, high-intensity vibrational modes at 685 cm −1, corresponding to the formation of Nb 2 O 5 due to laser irradiation. The E 2 g modes, indicative of in-plane Nb C vibrations, are consistent across all samples.

2024年6月24日 · Endogenous Nb2CTx/Nb2O5 Schottky heterostructures for superior lithium-ion storage. MXenes are progressively evolving two-dimensional (2D) materials with an expanding wide range of applications in the field of energy storage. They rank among the best electrode materials for… ...

Here, a new electrode material N‐Fe‐C@Nb2CTx is introduced, with a layered sandwich structure consisting of N‐doping Fe‐MOF derived‐nanorods (Fe‐...

2024年11月23日 · The material structure of Nb 2 CT x was studied using Raman spectroscopy, as shown in Figure 2b. Peak analysis of the obtained Raman spectrum revealed that the spectrum of Nb 2 CT x has two Raman shifts (D peak and G peak) corresponding to the carbon species due to etching during the material preparation process.

Two-dimensional (2D) nonlinear optical mediums with high and tunable light modulation capability can significantly stimulate the development of ultrathin, compact, and integrated optoelectronics devices and photonic elements. 2D carbides and nitrides of transition metals (MXenes) are a new class of 2D materials with excellent intrinsic and stron...

2024年6月24日 · We report differences in Raman spectra collected from single flakes of Ti3C2Tx, colloidal solutions and multilayer films.