A visible light responsive bismuth ferrite-bismuth oxide composite material and its preparation method
A composite material, bismuth ferrite technology, applied in the field of photocatalytic materials and environmental protection, can solve the problems of low photocatalyst quantum yield, difficulty in fully interweaving phase interface, complicated preparation process, etc., to achieve industrial scale-up production, excellent light Catalytic performance, the effect of simple preparation method
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Embodiment 1
[0020] A bismuth ferrite-bismuth oxide composite material used in the field of visible light catalysis and its preparation method: (1) at room temperature, stirring and dissolving bismuth nitrate and ferric nitrate in 20 mL of freshly prepared 5% dilute nitric acid solution. (2) While stirring, add freshly prepared potassium hydroxide solution with a concentration of 6.4mol / L drop by drop. The amount of potassium hydroxide added is: the molar ratio of potassium hydroxide and nitric acid is 17:1. (3) Magnetically stir the precursor solution in step (2) for 30 minutes, then add it to a 100 ml hydrothermal kettle, and conduct a hydrothermal reaction at 200°C for 6 hours. After naturally cooling to room temperature, a brown precipitate is obtained, and the precipitate is washed with water and ethanol respectively. Three times each, and finally dried at a constant temperature of 80 °C for 10 h to obtain the final product. figure 1 is the XRD pattern of the product, and its x-ray ...
Embodiment 2
[0024] A bismuth ferrite-bismuth oxide composite material used in the field of visible light catalysis and its preparation method: (1) at room temperature, stirring and dissolving bismuth nitrate and ferric nitrate in 20 mL of freshly prepared 10% dilute nitric acid solution. (2) While stirring, add freshly prepared potassium hydroxide solution with a concentration of 6.4 mol / L drop by drop. The amount of potassium hydroxide added is: the molar ratio of potassium hydroxide and nitric acid is 17:2. (3) Magnetically stir the precursor solution in step (2) for 30 minutes, then add it to a 100 ml hydrothermal kettle, and conduct a hydrothermal reaction at 200°C for 8 hours. After naturally cooling to room temperature, a brown precipitate is obtained, and the precipitate is washed with water and ethanol respectively. Three times each, and finally dried at a constant temperature of 80 °C for 12 h to obtain the final product. Based on the weight of the catalyst as 100%, the composit...
Embodiment 3
[0026] A bismuth ferrite-bismuth oxide composite material used in the field of visible light catalysis and its preparation method: (1) at room temperature, stirring and dissolving bismuth nitrate and ferric nitrate in 20 mL of freshly prepared in dilute nitric acid solution with a mass fraction of 17%. (2) While stirring, add freshly prepared potassium hydroxide solution with a concentration of 6.4 mol / L drop by drop. The amount of potassium hydroxide added is: the molar ratio of potassium hydroxide and nitric acid is 17: 3.4. (3) Magnetically stir the precursor solution in step (2) for 30 minutes, then add it to a 100 ml hydrothermal kettle, react in hydrothermal reaction at 210°C for 6 hours, and naturally cool to room temperature to obtain a brown precipitate, which is washed with water and ethanol respectively Three times each, and finally dried at a constant temperature of 100 °C for 12 h to obtain the final product. Based on the weight of the catalyst as 100%, the compo...
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