Magnetic Ag/AgBr/LaFeO3 composite photocatalyst and preparation method thereof
A catalyst and composite light technology, applied in physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc., which can solve the problems of easy recombination of photogenerated carriers, weak visible light catalytic performance, and limited application. , to achieve the effect of simple production process, improved photocatalytic performance, and promotion of migration
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Embodiment 1
[0026] (1) Weigh 6.49g of lanthanum nitrate hexahydrate, 6.06g of ferric nitrate nonahydrate and 6.31g of citric acid monohydrate and dissolve them in 30mL of 70% ethanol aqueous solution, mix and stir for 30min, then heat and react at 80°C for 2h to obtain a gel substance . The gel material was dried at 100°C for 12h, then transferred to a muffle furnace, and fired at 600°C for 2h to obtain LaFeO 3 magnetic material.
[0027] (2) Weigh 1.0gLaFeO 3 Dissolve in 100mL of cetyltrimethylammonium bromide solution with a mass concentration of 0.3%, stir magnetically for 30min, quickly add 5.9mL of 0.1mol / L silver nitrate solution, stir for 6h under dark conditions, and then filter with Wash with distilled water and absolute ethanol three times respectively, dry in an oven at 80°C, dry in an oven at 80°C, and bake at 500°C for 2 hours to obtain AgBr / LaFeO 3 photocatalytic material.
[0028] (3) Weigh 1.0g AgBr / LaFeO 3The composite photocatalyst was dispersed in 50mL of distilled...
Embodiment 2
[0031] (1) Weigh 6.49g of lanthanum nitrate hexahydrate, 6.06g of ferric nitrate nonahydrate and 6.31g of citric acid monohydrate and dissolve them in 36mL of 70% ethanol aqueous solution, mix and stir for 30min, then heat and react at 80°C for 3h to obtain a gel substance . The gel material was dried at 100°C for 12h, then transferred to a muffle furnace, and fired at 600°C for 2h to obtain LaFeO 3 magnetic material.
[0032] (2) Weigh 1.0g LaFeO 3 Dissolve in 100 mL of cetyltrimethylammonium bromide solution with a mass concentration of 0.6%, stir magnetically for 30 min, quickly add 11.8 mL of 0.1 mol / L silver nitrate solution, stir for 10 h under dark conditions, and then filter. Wash with distilled water and absolute ethanol three times, dry in an oven at 80°C, and bake at 500°C for 2 hours to obtain AgBr / LaFeO 3 photocatalytic material
[0033] (3) Weigh 1.0gAgBr / LaFeO 3 The composite material was dissolved in 50mL distilled water, and then irradiated and reduced fo...
Embodiment 3
[0036] (1) Weigh 8.66g of lanthanum nitrate hexahydrate, 8.08g of ferric nitrate nonahydrate and 8.41g of citric acid monohydrate, dissolve them in 36mL of 70% ethanol aqueous solution, mix and stir for 30min, then heat and react at 80°C for 3h to obtain a condensate gum substance. The gel material was dried at 100°C for 12h, then transferred to a muffle furnace, and fired at 700°C for 2h to obtain LaFeO 3 magnetic material.
[0037] (2) Weigh 1.0g LaFeO 3 Dissolve in 100mL cetyltrimethylammonium bromide solution with a concentration of 1.2%, magnetically stir for 30min, add 8.8mL of 0.2mol / L silver nitrate solution, stir for 8h under light-shielded conditions, then filter and wash with distilled water and anhydrous ethanol for three times, dried in an oven at 80°C, and roasted at 500°C for 2 hours to obtain AgBr / LaFeO 3 photocatalytic material.
[0038] (3) Weigh 1.0g AgBr / LaFeO3 composite material and dissolve it in 50mL distilled water, then carry out irradiation reduct...
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