Three modes of high-efficient photocatalysis using composites of TiO2-nanocrystallite-containing mesoporous SiO2 and Au nanoparticles
Source abstract
Abstract
A mesoporous SiO2 template containing TiO2 nanocrystals is synthesized via a sol–gel route, and Au nanoparticles (NPs) are deposited in the tubular mesochannels of the template by a photodeposition method (Au/SiO2–TiO2). Both of the photocatalytic activities under ultraviolet (UV) and visible (Vis) light irradiation are improved by the deposition of Au NPs. A commercially available photocatalyst, Degussa P25 is employed as a reference, and a comparative study shows that Au/SiO2–TiO2 possesses higher photocatalytic activity than that of P25. An action spectrum of methylene blue (MB) photobleaching using Au/SiO2–TiO2 reveals that the photocatalysis of Au/SiO2–TiO2 is carried out by three triggers: UV absorption by TiO2, and Vis light absorptions by Au NPs and MB.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · TiO2 Photocatalysis and Solar Cells · Catalytic Processes in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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