Noble metal doped graphene nanocomposites and its study of photocatalytic hydrogen evolution

Microwave synthesis of a CoSe2/graphene–TiO2 heterostructure for improved hydrogen evolution from aqueous solutions in the presence of sacrificial agents

“…As compared to our previous report, the photocatalytic H 2 evolution for Pt/graphene nanocomposites and P-25 were found to be marginally smaller than the present nanocomposites with TiO 2 [36]. The graphene, as an electron acceptor/transporter, can promote the separation of the photo generated electron-hole pairs in the ternary system; efficiently transport the photo generated electrons to TiO 2 valance band by creating a donor level to transfer to conduction band and finally improving the photocatalytic H 2 production.…”

“…As compared to our previous report, the photocatalytic H 2 evolution for Pt/graphene nanocomposites and P25 were found to be marginally smaller than the present nanocomposites with TiO 2 . 36 Graphene, as an electron acceptor/transporter, can promote the separation of the photo-generated electron-hole pairs in the ternary system, efficiently transport the photogenerated electrons to the TiO 2 valance band by creating a donor level to transfer to the conduction band and nally, improve the photocatalytic H 2 production. The role of the sacricial reagents is to provide electrons to consume the photo-generated holes to further increase the catalytic properties, which will help to increase the recombination time in our nanocomposites.…”

Fabrication of amino acid-based graphene-zinc oxide (ZnO) hybrid and its application for poly(ester–amide)/graphene-ZnO nanocomposite synthesis

“…In addition, graphene can act as a support to disperse and stabilize these metal and metal oxide nanoparticles (NPs). [32][33][34][35][36][37][38][39][40][41][42][43][44][45] Among several choices, ZnO NPs have been extensively studied as graphene or GO hybridizing agent. ZnO NPs are valuable materials and biofriendly absorbers that are employed for an extensive range of applications, owing to their unique electrical, optical, photocatalytic, and antibacterial properties.…”

Synergistic effect of PtSe2 and graphene sheets supported by TiO2 as cocatalysts synthesized via microwave techniques for improved photocatalytic activity

“…A similar approach has been applied to graphene oxide as a light harvester in studying the visible light photocatalytic activity when combined with metal or semiconductor materials. [10][11][12][13][14] In particular, owing to its unique sp 2 hybrid carbonated network, graphene-based materials have attracted considerable attention because of their high thermal conductivity (~5000 W m −1 K −1 ), excellent charge mobility at room temperature (200 000 cm 2 V −1 s −1 ), and extremely high theoretical specific surface area (~2600 m 2 g −1 ). 15,16 These excellent properties make graphene an excellent material in photocatalysts to increase the charge transfer separation of generated electron and holes.…”