Anisotropic Growth of TiO2 onto Gold Nanorods for Plasmon-Enhanced Hydrogen Production from Water Reduction

作者：Wu, Binghui; Liu, Deyu; Mubeen, Syed; Chuong, Tracy T.; Moskovits, Martin; Stucky, Galen D.^*

来源：Journal of the American Chemical Society, 2016, 138(4): 1114-1117.

DOI：10.1021/jacs.5b11341

• ELECTRON-TRANSFER
• ENERGY-TRANSFER
• TITANIUM-DIOXIDE
• CHARGE-CARRIERS
• SOLAR-ENERGY
• LIGHT
• METAL
• NANOSTRUCTURES
• HETEROSTRUCTURES
• GENERATION

Plasmonic metal/semiconductor heterostructures show promise for visible-light-driven photo catalysis. Gold nanorods (AuNRs) semi-coated with TiO2 are expected to be ideally structured systems for hydrogen evolution. Synthesizing such structures by wet-chemistry methods, however, has proved challenging. Here we report the bottom-up synthesis of AuNR/TiO2 nanodumbbells (NDs) with spatially separated Au/TiO2 regions, whose structures are governed by the NRs' diameter, and the higher curvature and lower density of C-n TAB surfactant at the NRs' tips than on their lateral surfaces, as well as the morphology's dependence on concentration, and alkyl chain length of C-n TAB. The NDs show plasmon-enhanced H-2 evolution under visible and near-infrared light.

• 出版日期2016-2-3
• 单位厦门大学