Abstract
The azo dye Basic Blue 41 was subjected to photocatalytic and photoelectrocatalytic degradation using nanopararticulate titania films deposited on either glass slides or Fluorine doped Tin Oxide (FTO) transparent electrodes. The degradation was carried out by irradiating titania films with weak ultraviolet (UVA) radiation. The degradation was faster when using FTO as a titania support even without bias and was further accelerated under forward electric bias. This result was explained by enhanced electron-hole separation even in the case of the unbiased titania/FTO combination. This system for organic material photocatalytic degradation was also successfully applied to the degradation of the anti-inflammatory drug piroxicam, which demonstrated a well distinguished degradation behavior in going from a plain glass support to unbiased and biased FTO. The degradation pathway of piroxicam has been additionally studied using liquid chromatography-accurate mass spectrometry analysis.
Highlights
It is generally accepted that photoelectrocatalytic treatment of organic pollutants can accelerate their photocatalytic degradation [1,2,3,4,5]
Photocatalytic and photoelectrocatalytic degradation of both BB41 and piroxicam were carried out Photocatalytic and photoelectrocatalytic degradation of both BB41 and piroxicam were carried in a cylindrical batch reactor made of pyrex glass capable of accommodating a photoanode, counter, out in a cylindrical batch reactor made of pyrex glass capable of accommodating a photoanode, and reference electrode
As explained in the Introduction, BB41 was used as a model dye to study photoelectrocatalytic vs. photocatalytic degradation
Summary
It is generally accepted that photoelectrocatalytic treatment of organic pollutants can accelerate their photocatalytic degradation [1,2,3,4,5]. Made by depositing mesoporous nanoparticulate titania on have chosen to employ photoanodes water-born organic pollutants that have attracted the interest of researchers, dyes and FTOAmong electrodes. Structure), which been frequently present work as a model dye to study photoelectrocatalytic vs. Theas used as a model dye to test photocatalytic degradation [14,15,16,17]. Theas used as a model dye to test photocatalytic degradation [14,15,16,17] It has been used in the present work obtained results photoelectrocatalytic served as a guide tovs. A recent work [18] employed sonochemical oxidation to inflammatory drugs areAnti-inflammatory very popular in drugs modern because they are used to relievethey pain Owing their broad use, they are detected the are aquatic environment causing major concern used totorelieve pain.
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