Water-Assisted Hole Trapping at the Highly Curved Surface of Nano-TiO2 Photocatalyst

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From: Journal of the American Chemical Society(Vol. 140, Issue 4)
Publisher: American Chemical Society
Document Type: Report
Length: 86 words

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Abstract :

Using water-coverage-controlled steady and transient infrared absorption spectroscopy and large-model ab initio calculations, it is clarified that water enhances hole trapping at the surface of TiO2 nanospheres but not of well-faceted nanoparticles. This water-assisted effect unique to the nanospheres originates from water adsorption as a ligand at a low-coordinated TiuOH site or through robust hydrogen bonding directly to the terminal OH at the highly curved nanosphere surface.This morphology-dependent water-assisted effect provides a novel and rational basis for designing and engineering nanophotocatalyst morphology to improve photocatalytic performances.

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Gale Document Number: GALE|A534136399