Synthesis Method of Tungsten Trioxide

The invention provides a synthesis method of tungsten trioxide, belongs to the technical field of inorganic synthesis chemistry, and particularly relates to the synthesis method of the tungsten trioxide. The synthesis method comprises the following steps of: taking sodium tungstate dihydrate and sodium chloride as raw materials; utilizing hydrochloric acid to adjust a pH (Potential of Hydrogen) value of a reaction system to adjust the pH value to 1.5-3.0; carrying out hydrothermal reaction at 170-190 DEG C for 22-28 hours; and washing, centrifuging and drying to obtain tungsten trioxide powder. The obtained tungsten trioxide powder has different shapes and different photoelectric properties. According to the synthesis method disclosed by the invention, a one-step hydrothermal synthesis method is adopted, so that the operation is simple, the repetitiveness is good and the raw material cost is low; and the pH value is simply adjusted to obtain the tungsten trioxide powder with the different shapes and the different photoelectric properties, and the photocatalytic degradation efficiency on an organic dye is higher.

A method of synthesis of tungsten trioxide, the synthesis process is as follows: the sodium tungstate dihydrate and sodium chloride were added at a molar ratio of 1:2 in distilled water, the sodium tungstate dihydrate in distilled water at a concentration range of O. 016mol / L "0. 067mol / L between the ultrasonic 5min, under magnetic stirring, using hydrochloric acid to adjust pH of the solution 1. Γ3. O, stirring was continued for lh, to obtain a precursor solution; said precursor solution was transferred to the reactor, at 17 (Tl90 ° C hydrothermal reaction of 22 ~ 28h, cooled to room temperature, the resulting products were washed with distilled water and ethanol, centrifuged and dried to obtain the tungsten trioxide powder.




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