Graphene–CdS composite, synthesis and enhanced photocatalytic activity

Hydrothermal synthesis of magnetic CoFe2O4/graphene nanocomposites with improved photocatalytic activity

“…As can be seen from Fig. 6, with no foreign charges carrier, the delocalized electrons in the neat CoFe 2 O 4 might quickly recombine with the holes in the CB before capturing the electrons from the OH − [35,36], which hindered the following dye degradation process. On the contrary, the graphene in the CoFe 2 O 4 /graphene nanocomposites could act as the charges carrier since the large aromatic structure in graphene could effectively trap the delocalized electrons which delayed the recombination of the electrons and holes [37].…”

CdS nanowire-modified 3D graphene foam for high-performance photo-electrochemical anode

“…As a typical direct band gap semiconductor, CdS possesses a narrower band gap of 2.42eV than that of TiO 2 (3.2 eV) [3] and ZnO (3.7eV) [4], which facilitates the utilization of visible light and renders it a competitive candidate as a material of photo-anode. Disadvantageously, the rapid recombination of the photogenerated electron-hole pairs is a crucial barrier, hampering the PEC performance of CdS [5]. To overcome these limitations, numerous hybrids of CdS with other semiconductors [2,6], noble metals [7] or conductive materials [8] have been investigated.…”

Green synthesis of the reduced graphene oxide–CuI quasi-shell–core nanocomposite: A highly efficient and stable solar-light-induced catalyst for organic dye degradation in water

“…Moreover, graphene possesses very high chargecarrier mobility and specific surface area; these properties can promote the charge-separation efficiency of photogenerated electron-hole pairs, resulting from the strengthened interfacial contact between the RGO nanosheets and semiconductor nanostructures [16]. Considering this, researchers have recently made significant advances in fabricating various graphene-based nanocomposites embedding with a variety of inorganic semiconductor nanostructures, such as ZnO, [17], CdS [18,19], TiO 2 [20,21] and ZnS [22], Ag 3 CrO 4 [23], BiPO 4 [24] they found that the combination of semiconductor nanoparticles and reduced graphene nanosheets resulted in excellent catalytic activity for photo-oxidation of organic dyes. However, to the best of our knowledge, CuI-RGO core-shell nanocomposites with efficiently improved photo activity and photo stability have not been studied so far.…”