a flower-like bi 2 moo 6 Preparation and its application in photocatalytic reduction of co 2 application in
A photocatalytic and CO2 technology, applied in the field of photocatalysis, to achieve the effect of enriching catalytic active sites, short time consumption, and promoting emission reduction
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Embodiment 1
[0023] This embodiment is a flower-like morphology Bi 2 MoO 6 The preparation method mainly comprises the following steps:
[0024] Weigh bismuth nitrate pentahydrate (1.94 g), sodium molybdate (0.484 g) and 0.3 g of polyvinylpyrrolidone were dissolved in 20 mL of 1 M HNO 3 solution, magnetically stirred for 30 min, mixed the above three solutions, transferred to a 100 mL reactor, 180 o C was maintained for 24 h, and cooled to room temperature after the reaction was completed; the solid after the hydrothermal reaction was washed with deionized water to neutrality, and the solid part obtained after centrifugal filtration was at 80 o After drying in the oven of C for 8 h, the flower-like morphology Bi was obtained. 2 MoO 6 catalyst.
Embodiment 2
[0026] The present embodiment is the prepared Bi under different conditions 2 MoO 6 Performance evaluation of photocatalysts.
[0027] Visible light catalytic reduction of CO 2 The reaction for preparing hydrocarbons is carried out in a self-made closed quartz reactor with its own cooling system and the temperature is controlled at 4 o C to maintain the reaction temperature. Add 50 mL of ultrapure water and 50 mg of Bi to the reactor 2 MoO 6 Photocatalyst, after the air in the reactor is pumped out, CO is continuously introduced 2 30min (flow rate is 100mL / min) obtains saturated CO 2 solution, stable CO 2 Flow rate (50 mL / min), magnetic stirring, turn on the 300 W xenon lamp source, wavelength ≥ 420nm, stop the light after 4 hours of reaction, centrifuge the liquid phase product, and detect it with gas chromatography. Bi synthesized under different conditions 2 MoO 6 The photocatalytic performance is shown in the table below:
[0028]
Embodiment 3
[0030] Lighting time (hours)
[0031] The above examples can prove that the Bi of the flower-like morphology involved in the present invention2 MoO 6 Material Catalytic Reduction of CO under Visible Light 2 Higher photocatalytic activity is shown in the reaction of preparing methanol and ethanol, which shows that the present invention has achieved the intended purpose of the invention.
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