A Surface-modified Tungsten Trioxide Europium and Preparation Method Photoelectrode

The present invention discloses a surface-modified europium photoelectrode and the preparation method. Electrical characteristics of the present invention is a method of depositing a tungsten obtained amorphous oxide film as the substrate, by dropwise dropping method evenly europium oxide in the surface of the tungsten film, and then calcined at a temperature, to obtain a surface modified with oxides of europium Tungsten photoelectrode. Optical properties of the present invention is significantly improved, and laboratory equipment is simple, easy to operate, mild conditions and with environmental friendliness.

A surface-modified tungsten trioxide europium photoelectrode, wherein a) the atomic mass of the photoelectrode and the tungsten in the ratio of europium 1:99-30:70; photoelectric 2) of the electrode Composition smaller particles; 3) according to the photoelectrode with europium luminescence intensity increase and strengthen the modification; 4) the band gap of the photovoltaic electrode modified with increased europium widened; photoelectric 5) on the pole photocurrent 0.8V voltage than that of pure tungsten trioxide photoelectrode maximum increase of 12 times.

A surface-modified tungsten trioxide europium photoelectrode preparation method characterized by comprising the steps of: a) preparing an amorphous tungsten oxide film: In Na2WO4 H2O2 solution was added to obtain a clarified liquid electrolyte containing W20n2_ ; then electrodeposition, an amorphous tungsten oxide film; 2) surface modification method of Eu was added dropwise: The surface of the film of amorphous tungsten oxide was added dropwise a solution of europium nitrate in step I) obtained dried to obtain a surface-modified europium tungsten oxide film; 3): calcination step 2) to obtain a surface-modified tungsten oxide film at 450 ° C europium calcination under 3h, cooled to room temperature and taken out to obtain a surface-modified tungsten trioxide europium photoelectrode.




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