Crystalline yellow tungsten oxide is the lower specification of tungsten trioxide powder. It can be prepared by hydrothermal synthesis method. Studies have shown that, in the hydrothermal synthesis process, different doses and kinds of assistant agent will have different effects on the morphology and crystalline of yellow tungsten oxide (WO3/YTO). So, what effect does the assistant agent have on WO3?
Effect of Different Kinds of Assistant Agents on YTO
At the same experimental condition, adding different types of assistant agents (Na2C2O4, Na2SO4, H2C2O4), found:
1. There are different overall morphology structures of YTO.
2. The same crystals. It shows different types of assistant agents have no affect on the YTO crystalline.
Effect of Different Doses of Assistant Agents on YTO
In experiment of sodium tungstate dihydrate (Na2WO4•2H2O) as raw material, DL-malic acid as assistant agent to prepare precursor dimensional spherical morphology WO3•xH2O, adding different dose of malic acid has a great impact on the morphology and crystalline of WO3•xH2O. Thereby affecting gas sensing property of tungsten trioxide.
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