La-doped (BiO)2CO3 photocatalyst and preparation method thereof
A photocatalyst and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of unsatisfactory photocatalytic oxidation selectivity, high electron-hole recombination rate, and low light utilization efficiency and other problems, to achieve the effect of improving visible light catalytic activity and selectivity, simple operation, and low production cost
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[0035] Refer to attached figure 1 A La-doped (BiO) disclosed by the present invention 2 CO 3 The preparation method of photocatalyst comprises the following steps:
[0036] S1. Dissolve an appropriate amount of soluble carbonate in an aqueous solution, transfer to a high-pressure hydrothermal kettle and stir evenly;
[0037] S2. Add an appropriate amount of La compound to the autoclave and stir evenly;
[0038] S3. Add an appropriate amount of Bi-containing precursor to the high-pressure hydrothermal kettle, stir evenly, and then undergo a hydrothermal reaction to obtain a solid mixture. The solid mixture is centrifugally washed and then dried.
[0039] Wherein, the above-mentioned La compound is one or more of lanthanum nitrate, lanthanum acetate, and lanthanum carbonate; the above-mentioned Bi-containing precursor is one or more of bismuth citrate, bismuth ammonium citrate, and bismuth nitrate pentahydrate; The reaction temperature of the hydrothermal reaction in step S3 i...
Embodiment 1
[0054] Dissolve 0.46g of sodium carbonate in 65mL of deionized water, transfer to a 100mL autoclave and stir for 10min, add 0.009g of lanthanum nitrate hexahydrate and stir for 10min, then add 1.6g of bismuth citrate and stir for 30min, and then The reaction was carried out at ℃ for 24 hours. After the reaction, the reaction product was taken out, and the reaction product was centrifuged and washed once with water and ethanol, and then dried at 60 ℃ to obtain La-doped (BiO) 2 CO 3 Photocatalyst solid.
[0055] The La ion prepared by the embodiment of the present invention and (BiO) 2 CO 3 The microspheres were doped with 1% La (BiO) at a molar ratio 2 CO 3 The photocatalyst degrades NO. The specific process is: under the conditions of 60% relative humidity, 21% oxygen content, 3.3L / min flow of NO gas flow, and 600 μg / kg initial concentration of NO, 0.2g Example Prepared La-doped (BiO) 2 CO 3 The photocatalyst is placed on a glass disc; four small fans are installed arou...
Embodiment 2
[0057] Dissolve 0.46g of sodium carbonate in 65mL of deionized water, transfer to a 100mL autoclave and stir for 10min, add 0.044g of lanthanum nitrate hexahydrate to it and stir for 10min, then add 1.6g of bismuth citrate and stir for 30min, at 160 The reaction was carried out at ℃ for 24 hours. After the reaction, the reaction product was taken out, and the reaction product was centrifuged and washed once with water and ethanol, and then dried at 60 ℃ to obtain La-doped (BiO) 2 CO 3 Photocatalyst solid.
[0058] To the La ion prepared by the embodiment of the present invention and (BiO) 2 CO 3 The microspheres were doped with 5% La (BiO) at a molar ratio 2 CO 3 Photocatalyst to NO degradation test process is the same as embodiment 1. Calculate the La doped (BiO) prepared by the embodiment of the present invention 2 CO 3 The degradation rate of photocatalyst to NO is 49.8%, and the NO 2 The production rate of 13.1%, compared with the pure phase (BiO) 2 CO 3 Microsph...
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