Preparation method of palladium modified porous niobium oxide material
A niobium oxide and pore-shaped technology, which is applied in chemical instruments and methods, preparation of imino compounds, catalyst activation/preparation, etc., can solve the problems of long preparation cycle of materials, achieve easy synthesis control, avoid acid-base conditions, and preparation methods simple effect
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Embodiment 1
[0016] Disperse 0.6306g of melamine, 0.5380g of niobium oxalate and 0.0230g of palladium nitrate in 30mL of ethanol and stir, transfer the mixture into a round bottom flask, and dry the solvent in an oil bath at 105°C. After drying, cool to room temperature, transfer to a crucible, increase the heating rate of 10 °C / min to 650 °C and bake for 4 hours, and cool to room temperature to obtain a palladium-modified porous niobium oxide material. Micromeritics ASAP 2010 physical adsorption instrument was used to measure the pore volume of the sample. Before the test, the sample was vacuum-processed at 120°C for more than 12h to make the vacuum degree reach 10 -6 about torr, and then tested at the temperature of liquid nitrogen (-196°C). Nitrogen adsorption and desorption experiments show that the material has a pore volume of 0.22 cm 3 / g, the pore size distribution is 1-24nm. The morphology of the samples was observed using a JEM-2100F transmission electron microscope. Before th...
Embodiment 2
[0018] Disperse 1.0090g of melamine, 0.3030g of ammonium niobium oxalate and 0.0225g of palladium acetate in 30mL of ethanol and stir. Transfer the mixture into a round bottom flask and dry the ethanol solvent in an oil bath at 105°C. After the solvent is dried, cool to room temperature, transfer to a crucible, increase the heating rate of 10 °C / min to 650 °C for 4 hours, and cool to room temperature to obtain a palladium-modified porous niobium oxide material. Micromeritics ASAP 2010 physical adsorption instrument was used to measure the pore volume of the sample. Before the test, the sample was vacuum-processed at 120°C for more than 12h to make the vacuum degree reach 10 -6 about torr, and then tested at the temperature of liquid nitrogen (-196°C). Nitrogen adsorption and desorption experiments show that the material has a pore volume of 0.26 cm 3 / g, the pore size distribution is 1-28nm. The morphology of the samples was observed using a JEM-2100F transmission electron m...
Embodiment 3
[0020] Disperse 1.2612g of melamine, 0.3182g of niobium ethoxide and 0.0305g of palladium acetylacetonate in 30mL of ethanol and stir, transfer the mixture into a round bottom flask, and dry the ethanol solvent in an oil bath at 105°C. After the solvent is dried, cool to room temperature, transfer to a crucible, increase the heating rate of 10 °C / min to 650 °C for 4 hours, and cool to room temperature to obtain a palladium-modified porous niobium oxide material. Micromeritics ASAP 2010 physical adsorption instrument was used to measure the pore volume of the sample. Before the test, the sample was vacuum-processed at 120°C for more than 12h to make the vacuum degree reach 10 -6 about torr, and then tested at the temperature of liquid nitrogen (-196°C). Nitrogen adsorption and desorption experiments show that the material has a pore volume of 0.35 cm 3 / g, the pore size distribution is 2-37nm. The morphology of the samples was observed using a JEM-2100F transmission electron ...
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