Abstract
In this paper, a novel three dimensional carbon boron nitride (3D C-BN) was successfully prepared. The obtained material has porous cheese-like structure and pore size ranging from 2 nm to 100 nm. Attractively, the 3D C-BN, which combines the adsorption advantages of BN and carbon together, exhibits excellent adsorption properties for organic dyes, oils and heavy metal ions. The maximum removal capacities of 3D C-BN for methyl blue (MB) and congo red (CR) are 408 mg g−1 and 307 mg g−1, respectively. Furthermore, 3D C-BN can quickly and efficiently remove oils (salad oil, gasoline and pump oil) and heavy metal ions (Cr3+, Cd2+ and Ni2+) from waste water. The macro bulk 3D C-BN, which is more convenient to use than powdered materials, can be reused by burning or heating in air and still maintains high adsorption capacity. Significantly, these superior performances can find practical application in water purification.
Highlights
Hexagonal boron nitride (h-BN), known as “white graphite”, is an isostructure of carbon which possesses preeminent physical and chemical properties such as low density, high thermal conductivity, chemical stability, as well as the outstanding adsorption properties[13,14,15,16,17,18,19]
Various adsorbents have been explored for the removal of hazardous organic dyes, oils pollution and heavy metal ions from aqueous solution, including the commonly used activated carbon, zeolite, mesoporous alumimum oxide, carbonaceous nanofiber adsorbents, magnetic powder composite, montmorillonite and so on[23,24,25,26]
A cheese-like 3D carbon-boron nitride (C-BN) was successfully synthesized by a simple heated treatment without any templates
Summary
Hexagonal boron nitride (h-BN), known as “white graphite”, is an isostructure of carbon which possesses preeminent physical and chemical properties such as low density, high thermal conductivity, chemical stability, as well as the outstanding adsorption properties[13,14,15,16,17,18,19]. The product had a vesicular structure with hierarchical pores ranging from nm to μm scales and with ultrathin walls consisting of mono- or few-layered BN membranes. Research showed that this 3D BN foam presented super strong adsorbent ability in removing various oils and dyes[21]. The large surface area and 3D structure enable the L-CNTs shows a high removal efficiency www.nature.com/scientificreports/. In this contribution, we report an innovative method to synthesize a novel carbon-boron nitride (C-BN) composite material with unique cheese-like 3D morphology. The regenerative capacity after repeated adsorption of dyes and oils was studied
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