Synthesis and Characteristics of Graphene Oxide-Derived Carbon Nanosheet−Pd Nanosized Particle Composites

Abstract

Carbon nanosheet (CNS)-Pd nanosized particle (NP) composites were synthesized by using graphite oxide (GO) and bis(ethylenediamine)palladium(II) (Pd(en)(2)(2+)) as the precursors, and their structure and adsorption properties were examined. It was found that the Pd(en)(2)(2+) complex ions can be intercalated into GO layers highly efficiently to form a layered structure containing a large amount of Pd (approximately 12 wt %). By the subsequent chemical reduction, Pd NPs (2-6 nm in size) are well dispersed between CNS to form a CNS-Pd NP composite and serve as spacers to increase the porosity of the composite. Hydrogen adsorption results demonstrate that both Pd NPs and CNS play important roles in hydrogen adsorption, particularly at a lower temperature and for CNS with deficient sites, which bring about a H(2) adsorption greater than those on other Pd-loaded nanocarbon materials reported so far. The unique composite nanostructure having large contents of Pd NPs (20-25 wt %) stabilized by CNSs is hopeful to be applied to the fields of H(2)-related catalysis, sensing, and so forth.

25th Anniversary Article: Hybrid Nanostructures Based on Two‐Dimensional Nanomaterials

“…The controlled synthesis of metal nanostructures has received much interest since their physical and chemical properties are dependent on their size, shape, composition and structure . To date, various metallic nanostructures like Au, Ag, Pt, Pd, Fe, Ge, Sn, Si, Ni, Ru and bi‐/tri‐metallic ones such as FePt, PtPd, PdAg and Pt/CuPd have been successfully prepared on graphene‐based nanosheets, aiming to achieve enhanced performances in applications like catalysis, electronics and sensors.…”

Gemini surfactant assisted synthesis of two-dimensional metal nanoparticles/graphene composites

“…In addition, the absence of diffraction peak at around 251 suggests that the typical p-stacking of graphene sheets has been efficiently prevented 16 due to the decoration of GNPs on graphene in a 2D sandwich manner. 17 This should also be responsible for the good dispersibility of RGO/Gem/GNPs in water. The C1s XPS pattern of GO (Fig.…”

Comparative Study on the Regeneration of Fe3O4@Graphene Oxide Composites

“…We have synthesize magnetic GO composites as environmental materials recently (Hu et al, 2009(Hu et al, , 2010(Hu et al, , 2012. Fe 3 O 4 NPs have been successfully encapsulated with GO sheets though electrostatic interaction and covalent bonding, and both of the GO-based composites exhibited excellent adsorption toward contaminants in solution (Hu et al, 2017(Hu et al, , 2020.…”