Delamination of Layered Double Hydroxide in Ionic Liquids under Ambient Conditions.
Dóra TakácsGábor VargaKatarzyna SkibińskaAndrej JamnikMatija TomšičIstvan SzilagyiPublished in: The journal of physical chemistry letters (2022)
Liquid phase delamination of layered materials into single- or few-layer nanosheets leads to stable nanoscale dispersions of 2D materials. The delamination of layered double hydroxide (LDH) to double hydroxide nanosheets was studied in two ionic liquids (ILs): ethylammonium nitrate (EAN) and 1-butyl-3-methylimidazolium thiocyanate (BMIMSCN). The as-prepared lamellar structure of LDH disappeared upon dispersing it in ILs due to delamination into 2D nanosheets confirmed by X-ray scattering and diffraction techniques and further evaluated by height profile assessment of the nanoparticles by atomic force microscopy. The results showed that both the thickness and lateral size of the dispersed particles decreased in the IL-based samples, indicating that cleavage of the LDH materials can be observed in addition to delamination. The findings prove the concept of delamination of layered materials by ILs under ambient conditions─an excellent way to prepare 2D double hydroxide nanosheet dispersions in one step using nonvolatile green solvents.
Keyphrases
- ionic liquid
- reduced graphene oxide
- atomic force microscopy
- gold nanoparticles
- room temperature
- air pollution
- highly efficient
- particulate matter
- high speed
- quantum dots
- nitric oxide
- body mass index
- single molecule
- optical coherence tomography
- magnetic resonance imaging
- metal organic framework
- minimally invasive
- magnetic resonance
- computed tomography
- electron microscopy
- crystal structure