Enhanced photocatalytic activity of TiO2 assisted by Nb, N and S multidopants
Source abstract
Abstract
Abstract A novel visible light active photocatalyst is synthesized by doping TiO 2 with multiple dopants like Nb, N and S. TiO 2 exists as anatase phase and the particle size is in the range of 10–25 nm. A significant red shift of the absorption edge and increased visible light absorption is shown by multidoped TiO 2 compared to undoped TiO 2 . The tri-doped TiO 2 has the highest activity for the photodegradation of methyl orange and the activity shows the order: 0.6NbNS–TiO 2 > P25 > 0.6Nb–TiO 2 > NS–TiO 2 > pristine TiO 2 . The enhanced photocatalytic activity of tri-doped TiO 2 is due to the reduction of band gap and enhancement of lifetime of photogenerated charge carriers. This multidoped catalyst is found to be stable and only a marginal decrease in the activity is observed upto 3 cycles. Experiments with quenchers suggest that all super oxide, hydroxyl radicals and photogenerated holes are active species for the oxidation reaction.
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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