Abstract
Here, 6 different ultrathin (<5 nm) 2D metal oxides and hydroxides have been successfully synthesized via a simple precipitation route in formamide aqueous solution at room temperature.
Highlights
The rational preparation of ultrathin two-dimensional metal oxide and hydroxide nanosheets is the first and crucial step towards their utilization in both fundamental research and practical applications
As illustrated in Scheme 1, the synthesis strategy used mainly involves the diffusion of ammonia vapor (NH3) originating from ammonium hydroxide into formamide aqueous solution containing metal ion salts, triggering a reaction between the NH3 molecule and water molecule of the reaction solution to generate OH−, namely NH3 + H2O ⇌ NH4+ + OH−, which could increase the pH value of the solution
The survey spectra provided in Fig. S1† indicate the existence of O and corresponding metal elements for these six ultrathin 2D nanosheets, which agrees well with the composition of the aforementioned metal oxide and hydroxide nanosheets
Summary
The rational preparation of ultrathin two-dimensional metal oxide and hydroxide nanosheets is the first and crucial step towards their utilization in both fundamental research and practical applications. Synthesis of ultrathin metal oxide and hydroxide nanosheets using formamide in water at room
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