In Situ High-Pressure X-ray Diffraction and Raman Spectroscopy Study of Ti3C2Tx MXene

Abstract

The lattice stability and phonon response of Ti3C2Tx MXene at high pressure are important for understanding its mechanical and thermal properties fully. Here, we use in situ high hydrostatic pressure X-ray diffraction (XRD) and Raman spectroscopy to study the lattice deformation and phonon behavior of Ti3C2Tx MXene. XRD spectra indicate that no phase transformation occurs up to the pressure of 26.7 GPa. The elastic constant along a lattice parameter was calculated to be 378 GPa. In the Raman spectra obtained at high-pressure, the out-of-plane phonon modes (A1g at ~ 210, ~ 504, and ~ 711 cm−1) exhibit monotonic blueshifts with increasing pressure. The Grüneisen parameters of these three modes were calculated to be 1.08, 1.16, and 0.29, respectively. These results enrich the basic property data of Ti3C2Tx MXene and would benefit the further understanding of this novel material.

Facile Heterogeneously Catalyzed Nitrogen Fixation by MXenes

“…24 In the case of the Ti 3 C 2 T x MXene, thermal and mechanical stabilities were reported up to a temperature of 900 ºC and a pressure of 26.7 GPa. 40,41 Recent computational studies also provide compelling evidence that bare MXene materials are mechanically and dynamically stable. 42 All these findings strongly suggest that MXenes could display an efficient activity towards heterogeneous catalytic N 2 dissociation and, eventually, towards NH 3 synthesis in the HB process.…”

FeNC/MXene hybrid nanosheet as an efficient electrocatalyst for oxygen reduction reaction

“…1b shows two small bands at around 360 cm À1 and 600 cm À1 , which were assigned to the vibrations of atoms in Ti 3 C 2 T x MXene and thus indicative of MXene. [26][27][28][29] Another two broad bands were detected at around 1369 and 1580 cm À1 . The former (D-band) corresponds to disordered graphite from the defects in carbon-based materials, and the latter (G-band) is attributed to the vibration of sp 2 hybridized carbon atoms in a 2D hexagonal lattice.…”

Advances in the Application of Nanomaterials as Treatments for Bacterial Infectious Diseases

“…However, some of these antimicrobials agents, although effective against some bacteria, might be poisonous to mammalian cells [155,156]. Polymers have nonetheless been used in NP preparations to increase the appropriate host response to cationic antimicrobial agents in a balanced manner [157]. Although NPs have been used in the RES to facilitate eradication of systemic bacterial infection ex vivo and in vivo, the efficacy and adverse side effects of NPs on the RES system of clinical patients are still uncertain.…”