A green and direct synthesis of graphene oxide encapsulated TiO2 core/shell structures with enhanced photoactivity

Facile and Novel in-Plane Structured Graphene/TiO2 Nanocomposites for Memory Applications

“…Figure 5 shows the Raman measurements of GOT films, carried out at room temperature, before and after UV irradiation. The typical modes of TiO 2 anatase phase are clearly observed in both films at 152 cm −1 , 408 cm −1 , 511 cm −1 , and 631 cm −1 , attributed to E g(1) , B 1g , A 1g , and E g (2) , respectively [19,32]. Moreover, two characteristic peaks at about 1349 and 1601 cm −1 for graphitized structure are also observed, ascribed to the D and G bands, respectively.…”

“…The TiO 2 nanoparticles, prepared through sol-gel process, absorbed a lot of hydroxyl groups on its surface, while GO sheets have high content of oxygen functional groups, such as carboxylic acid (-COOH) and hydroxyl group (-OH), in the basal planes and the edge sides that could provide enough chemical groups to accomplish the chemical bonding reactions with TiO 2 nanoparticles [19].…”

“…The increase of the D/G intensity ratio in our work is attributed to the formation of defects and removal of oxide functional groups that suggests the successful UV reduction of GO [35]. Both FTIR and Raman emphasized the well samples preparation compared with other green and direct synthesis methods [19,29]. Figure 6 shows the XRD spectrum of the as-prepared thin films.…”

“…This reveals a considerable chemical bonding reactions, like dehydration condensation reaction, between TiO 2 and GO [28]. The strong band around 585 cm adsorption of TiO 2 nanoparticles onto GO nanosheets through chemical interaction between the surface hydroxyl groups of TiO 2 and the functional groups of GO [19,29]. Additionally, the bands related to the oxygen functional groups of GO were reduced in the spectrum of GT, revealing that the functional groups were almost removed under the effect of UV irradiation and thus GO was reduced successfully into graphene.…”

Photocatalytic Activity of Synthetic N‐doped TiO2/Reduced Graphene Oxide Crystalline Composites

“…Recently, efficiently modified methods are expected to be compounded with graphene, a 2D carbon sheet with a large amount of sp 2 -bonded, to increase the transfer of photoelectrons and surface adsorption of dyes through p-p interactions [19][20][21][22][23][24]. For this, graphene/ TiO 2 nanocomposites are considered as adoptable photocatalysts for degradation of dyes.…”