A kind of preparation method and application of au-doped Cu-loaded mesoporous catalyst
A catalyst, supported technology, applied in the preparation of organic compounds, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of insufficient adsorption and dissociation, low CO2 conversion rate, etc., and achieve high specific surface area and good dispersibility. Effect
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Embodiment 1
[0029] The preparation method of the Au-doped Cu-loaded mesoporous catalyst, the specific steps are as follows:
[0030] (1) First, 1.5 g of modified mesoporous molecular sieve NH 2 -SBA-15 powder is added at a liquid-solid ratio of 30.7:1ml / g to a concentration of 0.0025mol / LHAuCl 4 The solution was magnetically stirred at 25°C for 3 hours; then, under ultrasonic stirring conditions, 5ml of reducing agent NaBH with a concentration of 0.1mol / L was added 4 Carry out the reduction reaction for 30 minutes, filter and wash (use absolute ethanol to filter 4 to 6 times and wash 2 to 3 times) to obtain a solid product;
[0031] (2) Put 1.523g of the solid product obtained in step (1) in 50ml of copper nitrate solution with a concentration of 0.2mol / L, stir at a temperature of 50°C for 3h to obtain a mixed solution, filter and wash the mixed solution to obtain a solid product , the solid product was dried (dried at 110°C for 16h) and then calcined at 350°C for 5h to prepare the Au-C...
Embodiment 2
[0038] The preparation method of the Au-doped Cu-loaded mesoporous catalyst, the specific steps are as follows:
[0039] (1) First, 1.5 g of modified mesoporous molecular sieve NH 2 -SBA-15 powder is added at a liquid-solid ratio of 46.05: 1ml / g to a concentration of 0.0025mol / LHAuCl 4 The solution was magnetically stirred at 25°C for 3 hours; then, under ultrasonic stirring conditions, 5ml of reducing agent NaBH with a concentration of 0.1mol / L was added 4 Carry out the reduction reaction for 30 minutes, filter and wash (use absolute ethanol to filter 4 to 6 times and wash 2 to 3 times) to obtain a solid product;
[0040] (2) Put 1.535g of the solid product obtained in step (1) into 50ml of copper nitrate solution with a concentration of 0.2mol / L, stir at a temperature of 50°C for 3h to obtain a mixed solution, filter and wash the mixed solution to obtain a solid product , the solid product was dried (dried at 110°C for 16h) and then calcined at 350°C for 5h to prepare the ...
Embodiment 3
[0047] The preparation method of the Au-doped Cu-loaded mesoporous catalyst, the specific steps are as follows:
[0048] (1) First, 1.5 g of modified mesoporous molecular sieve NH 2 -SBA-15 powder is added at a liquid-solid ratio of 61.4: 1ml / g to a concentration of 0.0025mol / LHAuCl 4 The solution was magnetically stirred at 25°C for 3 hours; then, under ultrasonic stirring conditions, 10ml of reducing agent NaBH with a concentration of 0.1mol / L was added 4 Carry out the reduction reaction for 30 minutes, filter and wash (use absolute ethanol to filter 4 to 6 times and wash 2 to 3 times) to obtain a solid product;
[0049] (2) Put 1.546g of the solid product obtained in step (1) in 50ml of copper nitrate solution with a concentration of 0.2mol / L, stir at a temperature of 50°C for 3h to obtain a mixed solution, filter and wash the mixed solution to obtain a solid product , the solid product was dried (dried at 110°C for 16h) and then calcined at 350°C for 5h to prepare the Au...
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