Effective water splitting using CuO x /TiO 2 composite films: Role of Cu species and content in hydrogen generation
Source abstract
Abstract
Abstract We have fabricated a series of CuO x /TiO 2 composite films composed of TiO 2 nanorods and CuO x nanopariticles with copper content in the range of 0–4.75 at.% by a facile magnetron sputtering method for hydrogen generation from water splitting. By virtue of the one-dimensional TiO 2 nanostructures, all the nanorods films show excellent photocatalytic activity. Especially, there appear to be an optimum Cu content of 2.72 at.% giving the H 2 evolution rate of 53 mmol m −2 h −1 , which is about 15 times higher than that of pristine anatase TiO 2 nanorods film. To evaluate the effect of foreign copper on the photocatalytic properties, comprehensive structural, morphology and surface characterizations of catalysts have been carried out. It is found that CuO is an unstable species which is inevitably reduced to Cu 2 O during the initial stage of photocatalytic reaction, and the occurrence of highly disperse Cu 2 O species is responsible for the improved photocatalytic activity.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Copper-based nanomaterials and applications · ZnO doping and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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