Composite oxide as well as preparation method and application thereof
A composite oxide, oxide technology, applied in chemical instruments and methods, catalyst activation/preparation, iron compounds, etc., can solve the problems of unbearable, high reaction temperature, low hydrogen production rate, etc.
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Embodiment 1
[0057] Weigh a certain amount of ferric nitrate, cerium nitrate and titanium sulfate and dissolve them in deionized water, heat to 70°C, then slowly add concentrated ammonia water to the solution under stirring conditions to ensure that the pH value of the slurry is at 7.5, and after complete precipitation , left to age for 3 hours, filtered, and repeatedly washed with deionized water to neutrality, the obtained sample was dried and calcined at a drying temperature of 100°C for 24 hours. The calcination temperature is 580° C., and the calcination time is 8 hours. Obtain the composition formula of the final composite oxide as CeFe 18 Ti 5 o 39 Denoted as C1.
Embodiment 2
[0059]Weigh a certain amount of ferric nitrate, cerium nitrate and titanium sulfate and dissolve them in deionized water, heat to 80°C, then slowly add concentrated ammonia water to the solution under stirring conditions to ensure that the pH value of the slurry is at 9, and after complete precipitation , left to age for 10 hours, filtered, washed repeatedly with deionized water until neutral, then dried and calcined, the drying temperature was 150°C, and the drying time was 8 hours. The calcination temperature is 680° C., and the calcination time is 4 hours. Obtain the final composite oxide composition with the formula CeFe 24 Ti 15 o 68 Denoted as C2.
Embodiment 3
[0061] Weigh a certain amount of ferric nitrate, cerium nitrate and titanium sulfate and dissolve them in deionized water, heat to 75°C, then slowly add concentrated ammonia water to the solution under stirring conditions to ensure that the pH value of the slurry is at 8.3, and after complete precipitation , left to age for 6 hours, filtered, washed with deionized water repeatedly until neutral, then dried and calcined, the drying temperature was 120°C, and the drying time was 12 hours. The calcination temperature is 600° C., and the calcination time is 6 hours. Obtain the final composite oxide composition with the formula CeFe 20 Ti 10 o 52 Denote it as C3.
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