Low Temperature Hydrothermal Method Preparing Tungsten Trioxide Complex

Hydrothermal is the study of geologist simulating the natural mineralization in 19th century. Hydrothermal method is a category of liquid chemical method. Hydrothermal method is a method in a sealed pressure vessel, chemical reaction at high temperature and pressure conditions. Hydrothermal reaction depends on the type of reaction that can be divided into hydrothermal oxidation, hydrothermal reduction, hydrothermal precipitation, hydrothermal synthesis, water, thermal hydrolysis, hydrothermal crystallization. The material is dissolved in an aqueous nutrient medium in the heat, in the form of ions, molecules become into the solution.

Single tungsten trioxide material properties in the structure are flaws, they can not meet all the needs of practical application, in order to improve the performance of tungsten trioxide to meet the needs of more areas, we use the following method to prepare tungsten trioxide, which doping molybdenum trioxide, complexes were characterized on the structure and composition to improve the value of the actual use of composite tungsten trioxide.

Incorporating trioxide molar percentage of 0%, 1%, 5%, 8%, 10%, 12% ratio, a certain quality and 1.000g of sodium molybdate was dubbed to sodium tungstate solution, mixing them well. The above solution was dropped to 2ml hydrochloric acid, stirring 0.5h, transferring to a stainless steel autoclave, containing it at 100 ℃ about 24h. Drying it in forced air oven 6-7h, then placing it in a muffle furnace , burning it 400 ℃ 3h, tungsten trioxide is complex at last.

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