Vanadium-carbon modified oxygen-deficient titanium dioxide catalyst as well as preparation method and application thereof
A technology of titanium dioxide and oxygen deficiency, applied in the field of composite photocatalyst and its preparation, to achieve high conversion rate and selectivity, improved efficiency and good stability
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Embodiment 1
[0026] Nano-reticular titanium dioxide was prepared by hydrothermal method, 1g granular titanium dioxide (particle size 20-60nm) was dispersed in water by ultrasonic, 2.6g solid NaOH was added to dissolve, and then titanium foil was added at 140 ° C for hydrothermal treatment for 12h. After cooling to room temperature, the titanium dioxide was cooled to room temperature. The foil was taken out, washed with acid for 6h, then dried and calcined at 300°C for 2h. The white solid on the titanium foil was scraped off and collected. Dissolve 425 mg of vanadyl oxalate in 35 mL of water to form a solution of 12.14 mg / mL, disperse 725 mg of the prepared nano-reticulated titanium dioxide in the solution, stir for 30 min, and then hydrothermally heat it at 200 ° C for 12 h, through centrifugal separation, distilled water and anhydrous A solid product was obtained after washing with ethanol and drying. The solid product was calcined at 300 °C for 4 h in a muffle furnace, cooled, and then ...
Embodiment 2
[0028] Nano-reticular titanium dioxide was prepared by hydrothermal method, 1g of granular titanium dioxide (particle size 20-60nm) was dispersed in water by ultrasonic, 2.6g of solid NaOH was added to dissolve, and then titanium foil was added at 140 ° C for hydrothermal for 12h. After cooling to room temperature, the titanium The foil was taken out, washed with acid for 6h, then dried and calcined at 300°C for 2h. The white solid on the titanium foil was scraped off and collected. Dissolve 425 mg of vanadyl sulfate and 0.2 mg of polyethylene glycol (PEG) in 35 mL of water to form a solution of 12.14 mg / mL, and disperse the prepared 750 mg of nano-mesh titanium dioxide in the solution, stir for 30 min, and then hydrothermally heat it at 200 °C After 12 h, a solid product was obtained after centrifugation, washing with distilled water and absolute ethanol and drying. The solid product was calcined at 300 °C for 4 h in a muffle furnace, cooled, and then heated in N 2 Under th...
Embodiment 3
[0030] Nano-reticular titanium dioxide was prepared by hydrothermal method, 1g of granular titanium dioxide (particle size 20-60nm) was dispersed in water by ultrasonic, 2.6g of solid NaOH was added to dissolve, and then titanium foil was added at 140 ° C for hydrothermal for 12h. After cooling to room temperature, the titanium The foil was taken out, washed with acid for 6h, then dried and calcined at 300°C for 2h. The white solid on the titanium foil was scraped off and collected. Dissolve 425mg of vanadyl acetylacetonate and 0.2g of polyvinylpyrrolidone (PVP) in 35mL of water to form a solution of 12.14mg / mL, and disperse the prepared nanometer 750mg of mesh-like titanium dioxide in the solution, stir for 30min, and then in water at 180°C After heating for 12 h, a solid product was obtained after centrifugation, washing with distilled water and absolute ethanol and drying. The solid product was calcined at 300 °C for 4 h in a muffle furnace, cooled, and then heated in N 2...
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