Tungsten Trioxide Thin Film Photoelectrode

Europium is silver and white metallic element, it is used as color TV phosphors, and europium has important applications in laser materials and atomic energy industry. Europium content in the crust is 0.000106%, it is the rarest of rare earth elements. There are two isotopes of europium in the monazite in nature: Europium Eu 151 and 153. Europium oxide is also used in recent years of new X-ray medical diagnostic system stimulated emission phosphor. Europium oxide can also be used in the manufacture of colored lenses and optical filters for magnetic bubble storage devices. It is used in atomic reactor for neutron absorbing materials because its atoms can absorb more neutrons than any other element. In addition, it can be used as color TV phosphors, which emits bright red phosphor to make television screen.

The preparation method of europium surface-modified tungsten oxide photoelectrode including following steps:
1) The preparation of amorphous tungsten oxide thin film: adding H₂O₂ in Na₂WO₄ solution to obtain clarification W₂0n₂_ containing electrolyte; and Electrodeposition was carried out to obtain an amorphous tungsten trioxide thin film;
2) The dropwise europium surface modification method: the surface of the thin film orphous tungsten oxide europium nitrate was added solution of Step I), drying to obtain surface-modified tungsten oxide europium thin film;
3) Calcining: the Step 2) surface modification europium obtained tungsten oxide thin film in high-temperature about 450 ° C, cooling and taking out at room temperature to obtain surface-modified tungsten trioxide europium photoelectrode. Its photoelectric performance significantly improved, and the test equipment is simple, it has easy operation, mild conditions, and environmentally friendliness.