An all-solid photoelectrochemical cell for the photooxidation of organic vapours under ultraviolet and visible light illumination

作者：Georgieva J; Armyanov S; Poulios I; Sotiropoulos S^*

来源：Electrochemistry Communications, 2009, 11(8): 1643-1646.

DOI：10.1016/j.elecom.2009.06.019

• Tungsten trioxide
• Titanium dioxide
• Photoelectrochemical cell
• Photooxidation of organics
• Solid polymer electrolyte

An all-solid photorelectrochemical cell has been tested in the photooxidation of methanol vapours as a proof-of-concept for the application of electrochemically enhanced photocatalysis in air treatment. The cell was based on a Nafion(R)-impregnated microporous membrane that served as the solid polymer electrolyte. The working and reference electrodes (a TiO(2)/WO(3)-coated stainless steel mesh and AgCl-coated Ag wire, respectively) were adhered with the addition of a Nafion(R) solution onto one face of the membrane, while the counter electrode (a plain stainless steel mesh) was attached to its opposite face. The use of an electrosynthesized TiO(2)/WO(3) photoelectrode allowed the utilization of both UV and visible light. The device was tested by constant potential photoamperometry in air streams saturated with water or water-methanol vapours and the obtained photocurrent increased with increasing methanol levels, confirming the photorelectrochemical oxidation of methanol vapours under UV and visible light illumination.

• 出版日期2009-8