What is it about?
Magnetic particles were coated with a titanium dioxide (TiO2) layer, using a sol-gel process, to obtain magnetic recoverable Fe/TiO2 photocatalysts. The catalysts were prepared with different Fe concentrations and with or without thermal treatment. Discussions regarding the lowest band gap found via photoacoustic spectroscopy for the non-calcined 8% Fe/TiO2 magnetic catalyst agreed with the best performance as a photocatalyst. In addition, the catalysts lost their magnetic properties after being calcined.
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Why is it important?
A selenium (Se) photocatalytic reduction must efficiently decrease the risks of Se water contamination to human and aquatic life.
Perspectives
The risks of selenium (Se) water contamination to human and aquatic life make it important to develop and apply efficient Se removal methods. Selenium photocatalytic reduction is an effective technique for this purpose, but it still suffers from limitations related to the photocatalyst recovery at the end of the process. In this work, the photostability test performed using the best catalyst (non-calcined 8% Fe photocatalyst) indicated a decrease in the photoactivity from the second photocatalytic cycle onwards.
Professor Daniele T Dias
Federal University of Technology - Paraná
Read the Original
This page is a summary of: Sol–gel Fe/TiO2 Magnetic Catalysts Applied to Selenium Photoreduction, Topics in Catalysis, May 2020, Springer Science + Business Media,
DOI: 10.1007/s11244-020-01276-1.
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