Enhanced photoactivity and conductivity in transparent TiO₂nanocrystals/graphene hybrid anodes

Abstract

An optically transparent and UV-light active anode, characterized by high (photo)conductivity, charge mobility and exciton lifetime, based on CVD graphene, decorated with colloidal TiO2nanocrystals, has been fabricated, by a solution-based procedure.

Insight into the Real Efficacy of Graphene for Enhancing Photocatalytic Efficiency: A Case Study on CVD Graphene-TiO2 Composites

“…Owing to that the current density is related to the electron-transfer rate of the electrode materials, the largest peak current of CVDG-TiO 2 indicates the most efficient electron transfer, which can be attributed to the incorporation of CVDG with high electrical conductivity. 39 The result is well in accordance with the electrical conductivity measurement of the samples, as shown in Figure S10. Under the pressure range of 2−10 MPa, CVDG-TiO 2 reveals a noticeably lower resistivity than RGO-TiO 2 and TiO 2 .…”

“…As shown in Figure S9, all of the samples display clear anodic and cathodic peaks in the voltage range from −0.4 to 0.8 V. The peak current density of CVDG-TiO 2 is much larger than that of blank TiO 2 , while RGO-TiO 2 only presents a slightly higher value than blank TiO 2 . Owing to that the current density is related to the electron-transfer rate of the electrode materials, the largest peak current of CVDG-TiO 2 indicates the most efficient electron transfer, which can be attributed to the incorporation of CVDG with high electrical conductivity . The result is well in accordance with the electrical conductivity measurement of the samples, as shown in Figure S10.…”

π–π Interactions Mediated Pyrene Based Ligand Enhanced Photoresponse in Hybrid Graphene/PbS Quantum Dots Photodetectors

“…The functionalization of SLG with PBA‐QDs does not turn in any defect induced peak (D) in the Raman spectra, thanks to the non‐covalent nature of the π–π interactions. [ 35,46 ] Finally, in the spectrum of the sample after TBAI treatment of the PBA‐QDs functionalized SLG, the G and the 2D peaks up‐shift up to the same wavenumber observed for the TBAI treated OLEA‐QDs, 1585 and 2673 cm −1 , as a consequence of the same p‐doping effect of QDs upon laser irradiation during the Raman investigation. [ 35 ] The ensemble of results from FTIR and Raman spectra points out that PBA molecules are preserved after treatment with TBAI of the QDs film onto SLG.…”

Assembling 1D and Janus Nanobelts into 2D Aeolotropic Conductive Janus Membranes and 3D Double‐Walled Janus Tubes

“…At present, multi-functional nanomaterials [13,14] have attracted extensive attention from researchers. Nanomaterials [15][16][17][18][19][20][21][22][23] with a single function such as magnetic, [24] conductive [25] or fluorescent characteristics [26,27] are developing towards multifunctional nanomaterids such as with magnetismfluorescence, [28][29][30] fluorescence-conduction, [31,32] conduction-magnetism [33,34] dual-functionality and fluorescence-conductionmagnetism [35,36] tri-functionality. In this way, it is possible to realize double or triple functions in a nanostructured material, which is of great significance for the development of nanoscience and technology.…”