School of Mathematics and Natural Sciences

Chemicals

GHS Pictograms

EDTA-Solution, c = 0,2 mol/L

A photogalvanic one-pot cell is assembled from a flat cuvette, a platinated razor-foil and a photoelectrode. The cuvette is filled with an EDTA-solution. The photoelectrode is connected to the negative pole of a digital voltmeter, the platinum electrode to the positive pole. The photoelectrode can be irradiated with a UV flashlight.

  • When irradiated, voltages of up to U = 450 mV are measured, as well as currents I ranging from high microampere to low miliampere. Depending on the light source used, the cell can power a sensitive motor.

ITO or FTO glass plates coated with titanium dioxide (anatase) are used as photoelectrodes in this and other experiments with photogalvanic and photoelectrochemical cells. Details on the preparation of photoelectrodes can be found on the Webpages of the Wuppertaler Chemiedidaktik.

More information about #UniWuppertal: