Method for synthesizing caesium doped sodium tantalum oxide

Abstract

The invention aims at providing a method for preparing caesium doped sodium tantalum oxide. The method is characterized by comprising the following steps: adding sodium hydroxide, caesium hydroxide and tantalum pentoxide powder into deionized water; uniformly stirring the tantalum pentoxide powder, transferring the mixed solution into a hydrothermal reaction kettle with a polytetrafluoroethylene liner, screwing and sealing the reaction kettle, and standing in a constant-temperature oven at 180-220 DEG C to react for 6-12 hours; and washing and drying to obtain a final product caesium doped sodium tantalum oxide. The method is simple in process flow, low in synthesizing temperature and uniform in product size, has excellent photocatalytic performance, can be applied to the fields of photoelectric devices, fuel batteries and the like besides the field of catalysis.

Description

technical field

[0001] The invention belongs to the technical field of material chemistry and relates to a synthesis method of cesium-doped sodium tantalate. Background technique

[0002] Sodium tantalate NaTaO 3 It is a photocatalytic material with excellent performance, which can be used for photocatalytic degradation of organic pollutants and photolysis of water to produce hydrogen. Supporting heterojunction particles can greatly improve the catalytic performance, and NiO supports NaTaO 3 The efficiency of post-catalysis photolysis of water is greatly improved (J. Phys. Chem. B (2001), 105, 4285; Acta Catalytica Sinica (2011), 12, 1822). Element doping is also an important way to improve catalytic performance. The A-site trivalent element (La, Bi, In) doping and the B-site rare earth element (Ce, Eu) doping have been studied. The A-site cesium-doped sodium tantalate There are few reports on the synthesis and photocatalytic degradation performance of organic pollutants....

Examples

Embodiment 1

[0010] Add 6mol / L sodium hydroxide, 0.5mol / L cesium hydroxide and 0.05mol / L equivalent tantalum pentoxide powder into deionized water, stir the tantalum pentoxide powder evenly, and then transfer the mixed solution into the In the hydrothermal reaction kettle with vinyl fluoride liner, the reaction kettle is tightened and sealed, and placed in a constant temperature oven at 180°C for 6 hours of static reaction; alternately washed with deionized water and ethanol, and centrifuge sedimentation or suction filtration equipment is used after each washing Filtration, the filtered product is redispersed in deionized water or ethanol, repeated filtration until the pH value of the filtrate is 7, washed with ethanol for the last time to facilitate drying, and dried in an oven at 50°C to obtain the final product figure 1 Cesium-doped sodium tantalate powder shown.

Embodiment 2

[0012] Add 12mol / L sodium hydroxide, 1mol / L cesium hydroxide and 0.1mol / L equivalent tantalum pentoxide powder into deionized water, stir the tantalum pentoxide powder evenly, and then transfer the mixture into a tank with polytetrafluoroethylene In the hydrothermal reaction kettle with ethylene liner, the reaction kettle is tightly sealed, put it in a constant temperature oven at 220°C and let it stand for 12 hours to react; wash it alternately with deionized water and ethanol, and use centrifuge sedimentation or suction filtration equipment after each washing Filtration, the filtered product was redispersed in deionized water or ethanol, repeated filtration until the pH value of the filtrate was 7, washed with ethanol for the last time to facilitate drying, and dried in an oven at 70°C to obtain the final product cesium-doped sodium tantalate Powder.

Embodiment 3

[0014] Add 10mol / L sodium hydroxide, 1mol / L cesium hydroxide and 0.05mol / L equivalent tantalum pentoxide powder into deionized water, stir the tantalum pentoxide powder evenly, and then transfer the mixture into a tank with polytetrafluoroethylene In the hydrothermal reaction kettle with ethylene liner, the reaction kettle is tightened and sealed, and placed in a constant temperature oven at 200°C for 10 hours to stand for reaction; alternately wash with deionized water and ethanol, and use centrifuge sedimentation or suction filtration equipment after each washing Filtration, the filtered product was redispersed in deionized water or ethanol, repeated filtration until the pH value of the filtrate was 7, washed with ethanol for the last time to facilitate drying, and dried in an oven at 60°C to obtain the final product cesium-doped sodium tantalate Powder.

technical field

[0001] The invention belongs to the technical field of material chemistry and relates to a synthesis method of cesium-doped sodium tantalate. Background technique

[0002] Sodium tantalate NaTaO 3 It is a photocatalytic material with excellent performance, which can be used for photocatalytic degradation of organic pollutants and photolysis of water to produce hydrogen. Supporting heterojunction particles can greatly improve the catalytic performance, and NiO supports NaTaO 3 The efficiency of post-catalysis photolysis of water is greatly improved (J. Phys. Chem. B (2001), 105, 4285; Acta Catalytica Sinica (2011), 12, 1822). Element doping is also an important way to improve catalytic performance. The A-site trivalent element (La, Bi, In) doping and the B-site rare earth element (Ce, Eu) doping have been studied. The A-site cesium-doped sodium tantalate There are few reports on the synthesis and photocatalytic degradation performance of organic pollutants....

Examples

Embodiment 1

[0010] Add 6mol / L sodium hydroxide, 0.5mol / L cesium hydroxide and 0.05mol / L equivalent tantalum pentoxide powder into deionized water, stir the tantalum pentoxide powder evenly, and then transfer the mixed solution into the In the hydrothermal reaction kettle with vinyl fluoride liner, the reaction kettle is tightened and sealed, and placed in a constant temperature oven at 180°C for 6 hours of static reaction; alternately washed with deionized water and ethanol, and centrifuge sedimentation or suction filtration equipment is used after each washing Filtration, the filtered product is redispersed in deionized water or ethanol, repeated filtration until the pH value of the filtrate is 7, washed with ethanol for the last time to facilitate drying, and dried in an oven at 50°C to obtain the final product figure 1 Cesium-doped sodium tantalate powder shown.

Embodiment 2

[0012] Add 12mol / L sodium hydroxide, 1mol / L cesium hydroxide and 0.1mol / L equivalent tantalum pentoxide powder into deionized water, stir the tantalum pentoxide powder evenly, and then transfer the mixture into a tank with polytetrafluoroethylene In the hydrothermal reaction kettle with ethylene liner, the reaction kettle is tightly sealed, put it in a constant temperature oven at 220°C and let it stand for 12 hours to react; wash it alternately with deionized water and ethanol, and use centrifuge sedimentation or suction filtration equipment after each washing Filtration, the filtered product was redispersed in deionized water or ethanol, repeated filtration until the pH value of the filtrate was 7, washed with ethanol for the last time to facilitate drying, and dried in an oven at 70°C to obtain the final product cesium-doped sodium tantalate Powder.

Embodiment 3

[0014] Add 10mol / L sodium hydroxide, 1mol / L cesium hydroxide and 0.05mol / L equivalent tantalum pentoxide powder into deionized water, stir the tantalum pentoxide powder evenly, and then transfer the mixture into a tank with polytetrafluoroethylene In the hydrothermal reaction kettle with ethylene liner, the reaction kettle is tightened and sealed, and placed in a constant temperature oven at 200°C for 10 hours to stand for reaction; alternately wash with deionized water and ethanol, and use centrifuge sedimentation or suction filtration equipment after each washing Filtration, the filtered product was redispersed in deionized water or ethanol, repeated filtration until the pH value of the filtrate was 7, washed with ethanol for the last time to facilitate drying, and dried in an oven at 60°C to obtain the final product cesium-doped sodium tantalate Powder.

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