Preparation method and application of Bi/Bi2SiO5 photocatalyst
A photocatalyst, 3·5H2O technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the influence of sample stability, limitations, and complex reaction processes And other issues
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[0022] One Bi / Bi 2 SiO 5 The preparation method of the photocatalyst includes the following steps:
[0023] In the first step, the massage ratio is 2:1~4:1. Weigh Bi(NO 3 ) 3 ·5H 2 O and Na 2 SiO 3 ·9H 2 O, respectively dissolved in equal volumes of ethylene glycol and deionized water, stirred for 0.5 ~ 2 h to form solutions A and B, respectively. Take equal volumes of solutions A and B and mix and stir for 1 ~ 3 h to form a white suspension C ;
[0024] In the second step, add 1 mol / L NaOH solution dropwise to suspension C to adjust the pH of the solution to 9~14, transfer the reaction solution to a 100~500 mL reaction kettle, and react at 150~200℃ for 6~12 h, take out the reaction kettle and cool it to room temperature, perform centrifugal separation, wash the precipitate with deionized water and absolute ethanol for 3 times, then collect the precipitate and place it in an oven at 80°C to dry for 12 hours to obtain Bi / Bi 2 SiO 5 catalyst of light.
[0025] The pharmaceutical re...
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[0026] Example 1
[0027] 1) 1.940 g Bi(NO 3 ) 3 5H 2 O and 0.5684 g Na 2 SiO 3 9H 2 O (molar ratio 2:1) was dissolved in 50 mL ethylene glycol and 50 mL deionized water, and stirred for 1 h to form solutions A and B. Take equal volumes of 20 mL solution A and 20 mL solution B and mix and stir for 2 h , Forming a white suspension C;
[0028] 2) Add 1 mol / L NaOH solution dropwise to Suspension C to adjust the solution pH=11, transfer the reaction solution to a 100 mL reactor, react at 150°C for 6 hours, take out the reactor and cool to room temperature, After centrifugal separation, the precipitate was washed 3 times with deionized water and absolute ethanol, and then the precipitate was collected and dried in an oven at 80°C for 12 h to obtain Bi / Bi 2 SiO 5 catalyst of light.
[0029] Bi / Bi prepared above 2 SiO 5 Photocatalyst for light reduction of CO 2 Performance test, the selectivity of the gas phase product CO is 100%, photocatalytic reduction of CO under ultraviolet light, v...
Example Embodiment
[0030] Example 2
[0031] 1) 2.910 g Bi(NO 3 ) 3 5H 2 O and 0.5684 g Na 2 SiO 3 9H 2 O (molar ratio: 3:1) was dissolved in 100 mL ethylene glycol and 100 mL deionized water, and stirred for 1 h to form solutions A and B. Take 50 mL of solution A and 50 mL of solution B and mix and stir for 2 h to form White suspension C;
[0032] 2) Add 1 mol / L NaOH solution dropwise to Suspension C to adjust the pH of the solution to 12, transfer the reaction solution to a 200 mL reactor, react at 180°C for 8 hours, take out the reactor and cool it to room temperature. After centrifugal separation, the precipitate was washed 3 times with deionized water and absolute ethanol, and then the precipitate was collected and dried in an oven at 80°C for 12 h to obtain Bi / Bi 2 SiO 5 catalyst of light.
[0033] Bi / Bi prepared above 2 SiO 5 Photocatalyst for light reduction of CO 2 Performance test, the selectivity of the gas phase product CO is 100%, photocatalytic reduction of CO under ultraviolet light, ...
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