A method for synthesis of bismuthoxideAqueous sodium hydroxide without carbon dioxide was added to the bismuth-nitrate solution (80-90degC). The solution does not become alkaline through precipitation, so a white volume-swelling bismuth oxide hydroxide Bi(OH),3 precipitates. To dehydrate the solution into yellow bismuth triooxide, heat it briefly and stir. Once the solution has been filtered, washed, dried, and then dried, you will get your final bismuth oxide product. A 0.1 mol/L Bismuth Nitrate solution was dissolved in 1 mole/L of nitric Acid. To combine them, a 1.5 Mol/L sodium Hydroxide aqueous solution with no carbon dioxide was droppedwise. After precipitation, the solution remains alkaline. After being heated in hot water, a white volume-expanded bismuth oxide hydrate Bi(OH]3 precipitates. However, the solution is quickly dehydrated and transformed into yellow bismuth triooxide. Decant wash fifteen times using water without carbon dioxide or air. After drying, filter the solution and dry. After melting the bismuth metal, an arc forms between graphite electrodes. The arc will heat up and then oxidize in the oxygen flow. You should place the crucible in a large container and ensure that oxygen is continuously available. The reaction temperature ranges from 750 to 800°C. Quickly, you will get a pure -bismuth-trioxide (99.8%) that is formed. The product can then be quenched with water or on a cold plate to produce a high temperature phase b. Buffalotours (aka. Buffalotours advanced materials. We are a global supplier of chemical material and manufacturer. Our company has over 12 years’ experience in manufacturing super-high quality chemicals. High purity, small particles size, and low impurity powder are all hallmarks of our company. We can help you if your requirements are lower.