Localized Building Titania-Graphene Charge Transfer Interfaces for Enhanced Photocatalytic Performance.

Achieving high photocatalytic activity of titania-graphene composites calls for well-controlled titania size and efficient charge transfer interfaces. However, it is rather difficult because of easy restacking of graphene sheets and random nucleation and growth of titania nanoparticles in solution. Here, we reported a facile way to control the TiO sizes and interfaces by localizing the nucleation and growth of titania on graphene sheets, which prohibits both restacking of graphene and random growth of TiO.

Particulate Oxynitride Photoanodes Assembled with Transparent Electron-Collecting Oxide Nanorod Arrays.

The collection of photogenerated electrons is commonly a bottleneck in photoelectrochemical water oxidation on a particulate photoanode. Herein, a new strategy called "array insertion" for particulate photoanode preparation is proposed to improve electron collection. ZnO nanorod arrays are inserted between LaTiON particles and Al-doped ZnO (AZO) substrates via epitaxial electrodeposition, which make electronic connections.

Crucial Role of Donor Density in the Performance of Oxynitride Perovskite LaTiO N for Photocatalytic Water Oxidation.

LaTiO N photocatalysts were prepared by thermal ammonolysis of flux-synthesized La Ti O and La TiO , and were investigated for water oxidation. Though LaTiO N derived from La TiO appears defect-free by UV/Vis/near-IR and electron paramagnetic resonance (EPR) spectroscopy, its performance is much lower than that of conventional La Ti O -derived LaTiO N with defects. It is shown by Mott-Schottky analysis that La TiO -derived LaTiO N has significantly lower donor density; this can result in insufficient built-in electric field for the separation of photogenerated electrons and holes.

Controlled growth of semiconductor nanofilms within TiO₂ nanotubes for nanofilm sensitized solar cells.

Anodized TiO2 nanotubes were decorated by II-VI semiconductor nanofilms via atomic layer deposition (ALD) and further employed as photoanodes of semiconductor nanofilm sensitized solar cells (NFSCs) exhibiting superior photovoltaic performance.