Preparation of carbon quantum dot supported TiO2 nano-composite material, and application thereof in photocatalytic reduction of CO2
A technology of nanocomposite materials and carbon quantum dots, which is applied in the field of photocatalytic reduction of CO2, and can solve problems such as photocatalytic performance limitations
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Embodiment 1
[0034] (1) Synthesis of CQDs: Take 2.5g of glucose and dissolve it in 10mL of deionized water with stirring, and heat the mixture in a microwave oven on high heat for 5min. After the reaction is completed, viscous orange-yellow CQDs are obtained, and 10mL of deionized water is added to it Diluted into CQDs solution.
[0035] (2) CQDs / TiO 2 Synthesis of nanocomposites: Take 5 mL of the CQDs solution synthesized above, add 50 mL of deionized water, and add 5 mL of tetrabutyl titanate, stir for 1 h, transfer to a 100 mL stainless steel autoclave lined with polytetrafluoroethylene, and control the temperature It was reacted at 110°C for 24 hours; after the reaction, the mixture was cooled to room temperature, washed several times with deionized water, dried in an oven at 60°C for 12 hours, and the dried sample was ground to obtain CQDs / TiO 2 (5) Nanocomposite materials.
[0036] Photochemical performance test: CQDs / TiO 2 (5) CO for photocatalytic reduction 2 , the produc...
Embodiment 2
[0038] (1) Synthesis of CQDs: 2.5g of glucose was fully dissolved in 10mL of deionized water with stirring, and the mixture was heated in a microwave oven on high heat for 5min to obtain viscous orange-yellow CQDs; 10mL of deionized water was added to it to dilute into CQDs solution.
[0039] (2) CQDs / TiO 2 Synthesis of nanocomposites: Take 3mL of the above CQDs solution, add 50mL of deionized water, and add 5mL of tetrabutyl titanate, stir for 1h, transfer the mixture to a 100mL stainless steel autoclave lined with polytetrafluoroethylene, The reaction temperature was controlled at 110°C for 24 hours; after the reaction, the mixture was cooled to room temperature, washed several times with deionized water, dried in an oven at 60°C for 12 hours, and the dried sample was ground to obtain CQDs / TiO 2 (3) Nanocomposite materials.
[0040] Photochemical performance test: CQDs / TiO 2 (3) CO for photocatalytic reduction 2 , the production rate of CO was 5.2 μmol / g.
Embodiment 3
[0042] (1) Synthesis of CQDs: 2.5g of glucose was fully dissolved in 10mL of deionized water with stirring, and the mixture was heated in a microwave oven on high heat for 5min. After the reaction was completed, viscous orange-yellow CQDs were obtained, and 10mL of deionized water was added to it. Diluted into CQDs solution.
[0043] (2) CQDs / TiO 2 Synthesis of nanocomposites: Take 4 mL of the CQDs solution synthesized above, add 50 mL of deionized water, and add 5 mL of tetrabutyl titanate, stir for 1 h, transfer to a 100 mL stainless steel autoclave lined with polytetrafluoroethylene, and control the temperature It was reacted at 110°C for 24 hours; after the reaction, the mixture was cooled to room temperature, washed several times with deionized water, dried in an oven at 60°C for 12 hours, and the dried sample was ground to obtain CQDs / TiO 2 (4) Nanocomposite materials.
[0044] Photochemical performance test: CQDs / TiO 2 CO for photocatalytic reduction 2 , the p...
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