Preparation method of bismuth doped tin oxide/bismuth phosphate composite photocatalyst

A technology of tin oxide and bismuth phosphate, which is applied in the synthesis field of composite photocatalytic materials, can solve the problems of high photogenerated electron-hole recombination rate and low photocatalytic efficiency, and achieves wide absorption spectrum range, low cost and good market application. Foreground effect

Active Publication Date: 2019-01-18
HENAN NORMAL UNIV
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Problems solved by technology

SnO 2 It is a wide bandgap n-type semiconductor, which has the advantages of good thermal and chemical stability, non-toxicity, low raw material cost, high reduction potential, and good electron mobility. It is widely used in gas-sensitive materials, catalytic materials, supercapacitors, In terms of electrode materials, its band gap (Eg) is 3.6eV, and it can only absorb and utilize ultraviolet light in photocatalysis, and there are problems of high photogenerated electron-hole recombination rate and low photocatalytic efficiency.

Method used

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  • Preparation method of bismuth doped tin oxide/bismuth phosphate composite photocatalyst
  • Preparation method of bismuth doped tin oxide/bismuth phosphate composite photocatalyst

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Effect test

Embodiment 1

[0011] 0.5694g Na 2 SnO 3 4H 2 O was dissolved in 5 mL of deionized water, and then slowly added dropwise to 15 mL of dilute nitric acid solution with a molar concentration of 1.43 mol / L under vigorous magnetic stirring to obtain a white turbid solution; additional deionized water was added to make the total volume of the solution 30 mL, Continue to stir for 30 minutes, put the solution in a 50mL autoclave, and place it in a constant temperature oven at 180°C for hydrothermal reaction for 24 hours. After the autoclave is cooled to room temperature, centrifuge the reaction solution, and wash it with deionized water until neutral. Then washed with absolute ethanol, and then dried in a constant temperature oven at 60°C for 12 hours to obtain SnO 2 Photocatalyst, the photocatalyst degrades Rhodamine B dye wastewater under simulated sunlight (500W xenon lamp) for 1.5h, and the RhB removal rate is 50.96%.

Embodiment 2

[0013] 1.6007g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 15mL of dilute nitric acid solution with a molar concentration of 1.43mol / L to obtain a clear and transparent solution A; 0.2847g Na 2 SnO 3 4H 2 O was dissolved in 5mL of deionized water, and then slowly added dropwise to solution A under vigorous magnetic stirring to obtain white turbid solution B. Additional deionized water was added to make the total volume of the solution 30mL, and the stirring was continued for 30min, and the solution was filled in 50mL In a high-pressure reactor, put it in a constant temperature oven at 180°C for hydrothermal reaction for 24 hours. After the autoclave is cooled to room temperature, the reaction solution is centrifuged, washed with deionized water until neutral, then washed with absolute ethanol, and then placed Bismuth-doped tin oxide (Bi-SnO 2 ) photocatalyst, the photocatalyst degrades Rhodamine B dye wastewater for 1.5h under simulated sunlight (500W xenon lamp), and the RhB re...

Embodiment 3

[0015] 1.6007g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 15mL of dilute nitric acid solution with a molar concentration of 1.43mol / L to obtain a clear and transparent solution A; 1.1814g Na 2 HPO 4 12H 2 O was dissolved in 5mL deionized water, slowly added dropwise to solution A under magnetic stirring to obtain a white suspension, added deionized water to make the total volume of the solution 30mL, continued to stir for 30min, and filled the solution in a 50mL high-pressure In the reaction kettle, put it in a constant temperature oven at 180°C for hydrothermal reaction for 24 hours. After the autoclave is cooled to room temperature, the reaction liquid is centrifuged, washed with deionized water until neutral, then washed with absolute ethanol, and then placed in 60 BiPO was prepared by drying in a constant temperature drying oven for 12 hours 4 Photocatalyst, the photocatalyst degrades Rhodamine B dye wastewater for 1.5h under simulated sunlight (500W xenon lamp), and the Rh...

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Abstract

The invention discloses a preparation method of a bismuth doped tin oxide/bismuth phosphate composite photocatalyst. Bi(NO3)3.5H2O is dissolved in a dilute nitric acid solution to obtain a clear and transparent solution A; Na2SnO3.4H2O is dissolved in deionized water to obtain a solution B; under the stirring condition, the solution B is dropwise added into the solution A to obtain a solution C; Na2HPO4.12H2O is dissolved in the deionized water to obtain a solution D; then, under the stirring condition, the solution D is dropwise added into the solution C; the deionized water is supplemented,so that the total volume of a mixed system is 30mL; the solution is charged into a 50mL high-pressure reaction kettle; the high-pressure reaction kettle is put in a 180 DEG C constant temperature drying box; hydrothermal reaction is performed for 24h; after the high-pressure reaction kettle is cooled to room temperature, reaction liquid is centrifuged; after washing, the reaction liquid is put ina 60 DEG C constant temperature drying box; drying is performed for 12h; the bismuth doped tin oxide/bismuth phosphate composite photocatalyst is prepared. The prepared composite photocatalyst has theadvantages that the absorption spectrum range is wide; the performance is stable; high efficiency and no toxicity are realized; the composite photocatalyst can be used for efficiently degrading nonbiodegradable organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of synthesis of composite photocatalytic materials, and in particular relates to a preparation method of a bismuth-doped tin oxide / bismuth phosphate composite photocatalyst. Background technique [0002] With the progress of society and the continuous development of industry, the discharge of industrial wastewater has increased. Industrial wastewater has the characteristics of large amount, variety, refractory degradation and great harm. Among them, dye wastewater mainly comes from dye production and printing and dyeing factories. Due to its high chroma, it will affect the light transmission of water and threaten the normal growth of aquatic organisms. Dye wastewater has a complex composition and is difficult to degrade in the natural environment. Some of them have "carcinogenic, teratogenic, and mutagenic" effects on organisms and are more harmful. As a deep water treatment technology, photocatalytic techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/186B01J37/10C02F1/30C02F101/34C02F101/36C02F101/38
CPCB01J23/002B01J27/186B01J35/004B01J37/10C02F1/30C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2305/10
Inventor 孙剑辉褚亮亮董淑英张晶王宗舞吴子胜
Owner HENAN NORMAL UNIV
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