Low-temperature S-doping on N-doped TiO2 films and remarkable enhancement on visible-light performance
Source abstract
Abstract
Abstract Sulfur doping of nitrogen-doped TiO2 nanograss array films was realized through facile thiourea solution immersion at a low temperature of 353 K. Doped nitrogen and sulfur atoms were found mainly in the interstitial form. Nitrogen doping (N-doping) and sulfur doping (S-doping) enhanced visible light absorption and decreased the band gap of undoped TiO2 films from 3.10 to 3.01 and 2.81 eV, respectively. Furthermore, N-doped and N, S co-doping made the water absorbed on TiO2 was easier to chemically dissociate and generate hydroxide groups. N-doping favored to produce more O 2 • − radicals and S-doping benefit to generate more O H • radicals. Both O H • and O 2 • − active radicals played a significant role in the degradation of RhB. The photocatalytic activity of undoped TiO2 films was increased by 2.5 times by N-doping through urea treatment. By further S-doping, the photocatalytic performance of N-doped TiO2 films was enhanced by 4.0 times again.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · TiO2 Photocatalysis and Solar Cells · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (45)
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