The swelling and exfoliation behavior of protonated layered oxides using an organo-phosphonium base, tetrabutylphosphonium hydroxide (TBPOH), was examined for the first time. The action of the aqueous solution induced massive interlayer expansion up to ∼100-fold. The swollen crystals were immediately broken and completely exfoliated into unilamellar nanosheets in 1–2 h by shaking.
F. Geng, R. Ma, Y. Yamauchi and T. Sasaki, Chem. Commun., 2014, 50, 9977 DOI: 10.1039/C4CC03736G
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