Supercritical CO₂-assisted amorphization of WO_2.72and its high-efficiency photothermal conversion

Abstract

Amorphization of WO2.72 was successfully achieved with the assistance of supercritical carbon dioxide (SC CO2). Amorphous SC CO2-treated sample has strong optical absorbance and excellent photothermal conversion efficiency of 52.5% indicates they can be a promising photothermal agent.

Supercritical CO2‐Induced Amorphization in 2D Materials: Mechanism and Applications

“…Besides amorphous MoO 3À x , Li et al found the brilliant LSPR and photothermal performance in amorphous WO 2.72 . [69] Compared to WO 3 or MoO 3 , WO 2.72 with distinctive channel size as large as 7.0 Å is more favorable for better diffusion of CO 2 molecules into the lattice and implantation. [69] The collapse of crystal lattice and formation of the amorphous structure can be obtained, when CO 2 molecules come out of the crystal lattice.…”

Supercritical CO2 Directional‐Assisted Synthesis of Low‐Dimensional Materials for Functional Applications

“…Considering the phase transition in crystal structure relying on pressure and temperature, strain engineering of SC CO 2 plays a key role in the morphology evolution, lattice distortion, and destruction of 2D materials. [ 151–159 ] Through altering the pressure and temperature, single‐layer 2D VS 2 nanosheets have been successfully obtained in SC CO 2 expanded solvent systems (such as water/SC CO 2 /NMP). [ 160 ] The experiment results showed that the similar surface energies of NMP and VS 2 , the enhanced solubility and diffusivity of VS 2 , and anisotropic etching are critical factors in the exfoliation efficiency.…”

“…Considering the phase transition in crystal structure relying on pressure and temperature, strain engineering of SC CO 2 plays a key role in the morphology evolution, lattice distortion, and destruction of 2D materials. [151][152][153][154][155][156][157][158][159] Through altering [143] Copyright 2021, Wiley-VCH.…”

Photoluminescent coordination polymer bulk glasses and laser-induced crystallization

“…The loss of crystallinity results in a broadening or disappearance of peaks in the Raman spectra. [41][42][43] We performed X-ray absorption spectroscopy (XAS) for CuAu and CuAu-g to understand the local structure around Cu + . They showed identical X-ray absorption near-edge structure (XANES) spectra with the intense rising-edge 1s to 4p transition lies at 8980 eV, which is identical to Cu 2 O.…”