Cascade structure of TiO2/ZnO/CdS film for quantum dot sensitized solar cells

Cr(VI) remediation from aqueous environment through modified-TiO2-mediated photocatalytic reduction

“…The transport of electrons is facilitated from the semiconductor to graphene only when the work function of graphene is greater than the conduction band energy of the semiconductor. Since the work function of graphene (≈4.42 eV) [120–121] is greater than the conduction band potential of TiO 2 (−4.21 V vs vacuum) [122–124], photogenerated electrons from TiO 2 are efficiently transported to graphene, leading to enhanced photocatalytic activity (Fig. 7).…”

Noble metal modified reduced graphene oxide/TiO2 ternary nanostructures for efficient visible-light-driven photoreduction of carbon dioxide into methane

“…The synergistic dyad structure of GT provided access to an optically active charge transfer transition. The conduction band of anatase TiO 2 and the work function of rGO are −4.2 eV [60] and −4.42 eV [61], respectively. Such energy levels were beneficial for the photogenerated electrons to transfer from the TiO 2 conduction band to the rGO sheets, which could effectively separate the charge carriers and hinder electron-hole recombination.…”

TiO2–RGO hybrid nanomaterials for enhanced water splitting reaction

“…Therefore, the electron-accepting and electron-transporting properties of graphene in the composite could indeed suppress the charge recombination and improve their photo catalytic activities and is as shown in Scheme 4. The CB of anatase TiO 2 and the work function of RGO are À4.2 eV and À4.42 eV respectively [35,36] shown in the relevant energy level diagram Scheme 3. Such energy levels were beneficial for i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y x x x ( 2 0 1 5 ) 1 e8 the photogenerated electrons to transfer from the TiO 2 CB to the RGO, which could effectively separate the charge carriers and hinder electronehole recombination.…”