Photoelectrochemical properties of Fe(sub 2)O(sub 3)-Nb(sub 2)O(sub 5) films prepared by sol-gel method

Article Abstract:

Fe(sub 2)O(sub 3)-TiO(sub 2) ceramic thin films were prepared by sol-gel method and the photoanodic properties were studied in a three-electrode cell with an aqueous buffer solution of pH = 7 as the supporting electrolyte. The photoresponse extended to 600 nm, and incident photon to current efficiency (IPCE) was the maximum (18%) at the wavelength of 325 nm for the sample consisting of alpha-Fe(sub 2)O(sub 3) and FeNbO(sub 4) (Nb/Fe + Nb= 0.25).

Photons, Iron compounds

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Electrokinetic measurements reveal interfacial charge at polymer films caused by simple electrolyte ions

Article Abstract:

The process of charge formation at hydrophobic fluoropolymer films in aqueous electrolyte solution is analyzed on the basis of advanced electrokinetic measurements by mean of the microslit electrokinetic setup. The results suggested that the charge density and the total ion concentration in the inner part of the electrical double layer were found to increase with increasing ionic strength of the solution.

Electrolytes

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Surface conductivity reveals counterioin condensation within grafted polyelectrolyte layers

Article Abstract:

A study demonstrates surface conductivity as a valuable parameter for the characterization of surface-bound polyelectrolyte layers (PLs). The possibility of surface conductivity (SC) measurements of providing information about counterion condensation is discussed and it is concluded that the number of freely moving counterions is decreased due to counterion condensation.

Analysis, Electrolyte solutions, Condensation

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