Facile fabrication of hierarchical diamond-based AuNPs-modified nanocomposites via layer-by-layer assembly with enhanced catalytic capacities

摘要

Highlights?AuNPs-modified diamond-based nanocomposite catalysts.?Provide excellent catalytic performance of 4-nitrophenol.?The composite catalyst demonstrates good stability and reusability.AbstractThe diamond-based hierarchical AuNPs-modified nanocomposites materials were prepared via the synthesis of diamond@graphite building block and polyallylamine hydrochloride (PAH)/polyacrylic acid (PAA) layer-by-layer (LbL) assembled strategy. And the modified gold nanoparticles were carried out by the reduction of aqueous HAuCl4solution using the reductant NaBH4. The obtained layer-by-layer nanocomposites demonstrate obvious advantages such as high specific surface area, pore diameter and pore volume, providing a higher chance of gold nanoparticles accessible to the reactants. Thus the core–shell nanostructures from of LbL-assembled and diamond-based composite materials are beneficial to improve the catalytic capacity o