US 11,111,561 B2 · Preparation method and use of thickness-controllable bismuth nanosheet and bismuth alloy nanosheet

Abstract

The present disclosure relates to a preparation method and use of a thickness-controllable bismuth nanosheet and its alloy, in order to solve the technical problems that the existing metal catalysts for the conversion of carbon dioxide to formic acid exhibit a low efficiency, a high overpotential, a relatively positive hydrogen evolution potential, and a poor stability. In the present disclosure, a bismuth nanosheet of a single atom layer thickness with a thickness of only 0.7 nm is obtained through an aqueous solution reduction method by using a bismuth salt compound as a raw material, using ethylene glycol ethyl ether as a solvent, and using a highly reductive aqueous solution containing NaBH4, LiBH4 or the like as a reducing agent, under a protection atmosphere of an inert gas.

Claims7

Dependent claims

A method for preparing a bismuth-containing nanosheet, comprising the steps of:

adding 0.5 mmol of bismuth salt compound as a raw material into 200 mL of ethylene glycol ethyl ether as a solvent, stirring with sonication to homogenization until a clear solution is obtained,
subsequently stirring the solution at 25° C. for 30 min, under a protection of an inert gas,
cooling the resultant to ambient temperature,
then adding an aqueous reducing solution containing 20 mmol NaBH4 dropwise thereto under an inert gas atmosphere, and stirring for another 15 min, and
after completion of the reaction, allowing the reaction product to be sonicated, filtered, washed with ethanol and water, collected, and dried, to obtain the bismuth-containing nanosheet with a thickness of 0.7 nm.

2 more elements

Dependencies are inferred from the claim text.

Preparation method and use of thickness-controllable bismuth nanosheet and bismuth alloy nanosheet

Life of this patent

Preparation method and use of thickness-controllable bismuth nanosheet and bismuth alloy nanosheet

Life of this patent

Abstract

Claims7