Chitosan assisted synthesis of 3D graphene@Au nanosheet composites: catalytic reduction of 4-nitrophenol

Abstract

We report the eco-friendly chitosan assisted synthesis of 3D graphene@chitosan@Au nanosheet (3DG@CS@AuNSs) composites without using any toxic reductants or capping agents.

Porous gold nanoparticle/graphene oxide composite as efficient catalysts for reduction of 4-nitrophenol

“…[5][6][7][8][9] Recently, tremendous efforts have been devoted to the fabrication of three-dimensional materials involving graphene in the forms of aerogels, foams and sponges. [10][11][12][13][14][15] Such porous structures could effectively avoid the stacking of the graphene sheet while keep the intrinsic physicochemical properties and endow the resulting materials with features of high specic surface areas, strong mechanical strengths, good thermal stability, superior absorbability and extraordinary specic capacitance. [16][17][18] The derivative of graphene, graphene oxide (GO), usually obtained from the exfoliated graphite is commonly used as the precursor of graphene for its advantages of availability in large-scale and processability in water.…”

Catalytic Reduction of p-Nitrophenol on MnO2/Zeolite -13X Prepared with Lawsonia inermis Extract as a Stabilizing and Capping Agent

“…Accordingly, one major requirement for a good nanoparticles-based catalyst is to minimize aggregation. Much effort has been dedicated to preparing hybrid catalysts by immobilizing nanoparticles on a surface of suitable support, such as activated carbon [ 2 ], silica-based materials [ 38 ], metal, chitosan [ 11 ], graphene [ 39 ], polymers [ 28 ], and zeolite [ 40 ]. Among all the reported supports, zeolites are considered very attractive supports for nanoparticles due to their high thermal stability, high surface area, nanoporous crystalline structure, stability in organic solvents, non-toxicity, eco-friendliness, availability at low cost, and corrosion resistance [ 40 ].…”

Hot electron prompted highly efficient photocatalysis based on 3D graphene/non-precious metal nanoparticles

“…In the previous works, 3DGraphene loaded metal/metal oxide particles using as catalysts for the reduction of 4-NP were studied. The preparation procedures include template 31 or hydrothermal 32,33 methods using the corresponding metal salt as the precursors. These preparation processes have severe limitations for highly active catalyst, including the inferior dispersibility, insufficient size controlling, and more importantly, defective 3DGraphene structures abandoned the excellent intrinsic properties.…”