In:
Inorganic Chemistry Frontiers, Royal Society of Chemistry (RSC), Vol. 8, No. 20 ( 2021), p. 4482-4487
Abstract:
Two-dimensional (2D) metal oxide nanosheets have been synthesized through ion exchange reactions. However, they require a long time and lead to low production yields due to the molecular size of the intercalant and reaction activation energies. To reduce the processing time and accelerate the production yield, we introduce an ultrasonically supported ion exchange reaction process. We applied ultrasound energy on the solution of RuO 2 nanosheets and the intercalant after 3 days of stirring the ion exchange reaction. After 15 min, the yield of RuO 2 nanosheets increased by over 50%. In addition, we observed that the lateral size of the RuO 2 nanosheets decreased with the applied ultrasonic time. Density functional theory calculations demonstrated that the activation energy of exfoliation is significantly reduced by splitting the RuO 2 layers into a small lateral size. This result shows that ultrasound provides energy for 15 min of exfoliation of the RuO 2 nanosheets, after which the energy is used to break the RuO 2 nanosheets. The experimental and theoretical results suggest that an ultrasonic-supported ion exchange process offers a facile and efficient approach for fabricating 2D metal oxide nanosheets.
Type of Medium:
Online Resource
ISSN:
2052-1553
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2021
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