Palladium precursor for highly-efficient preparation of carbon nanosheet–palladium nanoparticle composites

Supramolecular graphene oxide-alkylamine hybrid materials: variation of dispersibility and improvement of thermal stability

“…Generally, the whole preparation process includes three steps: the oxidation of graphite, the dispersion of graphene oxide and the preparation of the GO-based supramolecular structure. Especially, the higher-efficiency preparation can be attributed to the formation of interfacial interactions between -NH 2 of alkylamine and -OH, C-O-C and CQO on GO, [46][47][48] and following a self-assembly process of multilayer nanosheets by van der Waals forces. 49 The schematic of the synthesis of the GO-based supramolecular nanostructure is consistent with all the characterization analysis.…”

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

“…The detectable layered structure of sample f in Figure 1 can be more clearly evidenced by changing the measurement conditions of XRD (by using a sample holder capably containing a larger area of and a thicker layer of sample and by slowing down the scanning speed). 42 Since the water contents in these Pd-containing samples are almost the same as confirmed by TG measurement (as will be mentioned later), instead of enhancement in physical adsorption amount of water (physisorption of water generally induces a change in I c value of GO in between 0.59 and 1.2 nm 7 ), the slight increase in I c value for these samples can be attributed to the adsorption of Pd(en) 2 2þ in GO interlayer. Therefore, the progressive increase in I c value from (b) to (f) in Figure 1 reflects the progressive increase in intercalation amount of Pd(en) 2 2þ , which can be easily understood from the dispersion state of GO because the swelled and exfoliated GO layers in a solution at a higher pH can be more sufficiently accessed by Pd(en) 2 2þ .…”

“…41 On the other hand, we reported very recently in a rapid letter that the above nonattainment can be solved by applying a basic palladium amine complex precursor in the synthesis approach. 42 In this paper, we studied in detail the intercalation property of a Pd amine complex precursor into GO layers, the formation of CNS-Pd NP composites by chemical reduction, and their adsorption properties. We examined the optimum condition for decorating and stabilizing large loadings of Pd NPs onto the nanosheet surface of carbon with high efficiency.…”

Exfoliated graphene sheets decorated with metal/metal oxide nanoparticles: Simple preparation from cation exchanged graphite oxide

“…Actually, some graphene-based materials having metallic nanoparticles such as TiO 2 [12,13], ZnO, Au, and Pt [14][15][16][17][18][19] have been synthesized from dispersed graphene oxide or exfoliated graphene sheets using impregnation method, sol-gel method, and others. Some carbon materials produced from graphene sheets have been created from intercalation compounds of graphite oxide and hydrophilic intercalants (some metallic precursors) through exfoliation during calcination procedures or chemical reduction of the intercalated GO materials [20][21][22][23][24][25]. Recently, we prepared novel carbon materials containing platinum, ruthenium, or palladium nanoparticles on graphene sheets at ca.…”