Photoelectrocatalytic vs. Photocatalytic Degradation of Organic Water Born Pollutants

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.

Employing speciation of metals to assess photo-assisted electrochemical efficiency for improving rainwater quality in Tehran, Iran

“…This would make the occurrence of direct oxidation less probable. However, the elevation in the destruction rate, despite the repelling electric polarization, could be attributed to the prevalence of indirect oxidation by .OH; this is what was emphasized in the introduction section (Papagiannis et al 2018).…”

ФОТОEЛЕКТРОКАТАЛІТИЧНА ДЕГРАДАЦІЯ АМIНОАЗОБАРВНИКІВ ДІОКСИДОМ ТИТАНА З ПОВЕРХНЕВИМИ СТАНАМИ Ti3+

“…Фотокатализ и электрокатализ, или их комбинация являются особенно полезными для устранения биологически токсичных, устойчивых к деградации материалов, таких как ароматические вещества, пестициды, компоненты нефтепродуктов и летучие органические соединения в сточных водах [7][8][9][10]. Материалы-токсиканты в значительной степени превращаются в стабильные неорганические соединения (вода, диоксид углерода и соли), то есть проходят минерализацию [11].…”

Towards the Configuration of a Photoelectrocatalytic Reactor: Part 1—Determination of Photoelectrode Geometry and Optical Thickness by a Numerical Approach

“…The PEC consists of the conformation of an electrochemical cell by integrating the photocatalyst into an anode (photoelectrode) and has received significant attention in the degradation of persistent pollutants due to the better use of the pair by decreasing recombination and maximising the production of the radical [ 14 ], making it an efficient and promising AOP for wastewater treatment [ 11 ], especially in textile dye degradation [ 15 ]. However, its development depends mainly on two factors: (i) the semiconductor material and (ii) the design of the electrodes/photoreactor [ 16 ].…”