3D white graphene foam scavengers: vesicant-assisted foaming boosts the gram-level yield and forms hierarchical pores for superstrong pollutant removal applications

摘要

A vesicant-assisted gas-foaming strategy has been reported to achieve 3D h-BN white graphene (WG) foams without any catalysts or templates. This technique could provide large-scale, high-yield and ultralight 3D WG foams with a very low density of 2.1 mg cm−3. The WG foams present hierarchical pores and ultrathin walls with single or several atomic layers. The WG foams present superhigh adsorption properties for organic solvents and oils with an adsorption capacity of up to 70–190 times its own weight for organic pollutants and oils. This study promotes a new design strategy to create 3D WG foams for high-performance pollutant removal applications in water treatment.