A kind of composite photocatalytic material and preparation method of tin nanoparticle-modified tritin tetraoxide nanosheets with oxygen vacancies

A technology of tritin tetroxide and composite photocatalysis, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to improve the utilization rate of light energy, promote separation, The effect of simple method

Active Publication Date: 2021-08-24
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, there have been no reports on the composite photocatalyst of tin tetraoxide with oxygen vacancies modified by metal tin nanoparticles, and the application of the photocatalyst to degrade pollutants by photocatalytic oxidation.

Method used

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  • A kind of composite photocatalytic material and preparation method of tin nanoparticle-modified tritin tetraoxide nanosheets with oxygen vacancies
  • A kind of composite photocatalytic material and preparation method of tin nanoparticle-modified tritin tetraoxide nanosheets with oxygen vacancies
  • A kind of composite photocatalytic material and preparation method of tin nanoparticle-modified tritin tetraoxide nanosheets with oxygen vacancies

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] ① weighed 5mM stannous chloride dihydrate (SnCl 2 · 2h 2 O, 1.128g), 12.5mM sodium citrate dihydrate (Na 3 C 6 Hide 5 O 7 · 2h 2 O, 3.6367g) was dissolved in 12.5ml of deionized water, stirred for 10min, ultrasonic 10min, an aqueous solution containing 12.5ml 0.2M sodium hydroxide was then added to adjust the PH to 5.5. Then ultrasonic 30min, stirred for 1h, dispersed and dissolved completely;

[0027] ② The above solution was transferred to a 50ml autoclave, for 12h at 180 [deg.] C;

[0028] ③ After completion of the reaction the reaction vessel was cooled to room temperature naturally, and washed 3-5 times with deionized water and the resulting product is ethanol, respectively, and then placed in a thermostatic blast oven kept 10h at 80 ℃, obtained as a pale yellow powder oxide tin sheet;

[0029] ④ tetroxide made taking the above steps three pieces tin powder in a quartz boat which was then placed in a tube furnace, in a mixed atmosphere of hydrogen and argon, and heated...

Embodiment 2

[0031] ① weighed 5mM stannous chloride dihydrate (SnCl 2 · 2h 2 O, 1.128g), 12.5mM sodium citrate dihydrate (Na 3 C 6 Hide 5 O 7 · 2h 2 O, 3.6367g) was dissolved in 12.5ml of deionized water, stirred for 10min, ultrasonic 10min, an aqueous solution containing 12.5ml 0.2M sodium hydroxide was then added to adjust the PH to 5.5. Then ultrasonic 30min, stirred for 1h, dispersed and dissolved completely;

[0032] ② The above solution was transferred to a 50ml autoclave, for 12h at 180 [deg.] C;

[0033] ③ After completion of the reaction the reaction vessel was cooled to room temperature naturally, and washed 3-5 times with deionized water and the resulting product is ethanol, respectively, and then placed in a thermostatic blast oven kept 10h at 80 ℃, obtained as a pale yellow powder oxide tin sheet;

[0034] ④ tetroxide made taking the above steps three pieces tin powder in a quartz boat which was then placed in a tube furnace, in a mixed atmosphere of hydrogen and argon, and heated...

Embodiment 3

[0036] ① weighed 5mM stannous chloride dihydrate (SnCl 2 · 2h 2 O, 1.128g), 12.5mM sodium citrate dihydrate (Na 3 C 6 Hide 5 O 7 · 2h 2O, 3.6367 g) was dissolved in 12.5 ml of deionized water, stirred for 10 min, ultrasonic 10min, then adding 12.5 ml of aqueous solution containing 0.2 M sodium hydroxide, and adjusted pH of 5.5. Then ultrason for 30 min, stirred for 1 h, which is completely dispersed;

[0037] 2 Transfer the above solution to 50 ml of the reaction kettle, reacted at 180 ° C for 12 h;

[0038] 3 After the reaction, the reaction kettle was naturally cooled to room temperature, and the resulting product was washed 3 to 5 times with deionized water and anhydrous ethanol, and then placed at a constant temperature blast drying tank at 80 ° C for 10 h, resulting in a pale yellow powder Tetoxide nanotinium;

[0039] 4 Take the above steps to the end of the quartzcea, then placed in the tube furnace, heated to 500 ° C in a mixed atmosphere of hydrogen and argon, heat insula...

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Abstract

The invention discloses a composite photocatalytic material of tin nanoparticle-modified tritin tetraoxide nanosheets with oxygen vacancies. The in-situ reduction under the atmosphere obtains tritin tetroxide with oxygen vacancies, and the metal tin is modified to form a Schottky junction on its surface. The diameter of the tin trioxide nanosheets is 300-500nm and the thickness is about 20nm; the diameter of the tin nanoparticles is 50-200nm. The photocatalytic material disclosed in the present invention combines the properties of Schottky junction and oxygen vacancies. On the one hand, the high-quality electrical conductivity of metals and metal / semiconductor Schottky junctions promote the separation and transport of carriers; on the other hand, oxygen vacancies can capture Photogenerated charges and widened the photoresponse range by lowering the semiconductor bandgap. The photocatalyst disclosed by the invention has high activity for oxidative degradation of organic pollutants under visible light, and the preparation method is simple, the cost is low, and the industrial application prospect is broad.

Description

Technical field [0001] The present invention relates to an optical heterostructure catalyst and preparation method, and particularly to photocatalytic material and its preparation method and Application of a modified tin oxide nanoparticles having oxygen vacancies sheet composite Tin Oxide, nano-materials belonging Photocatalysis field. Background technique [0002] Environmental pollution, especially refractory organic dye human pollution has become a major problem to be solved. Conventional processing methods present a number of shortcomings, such as biological treatment technology it is difficult to completely degraded contaminants; physical-chemical treatment techniques less efficient removal of contaminants, and may cause secondary pollution. The semiconductor photocatalytic oxidation technology directly using solar energy, efficient and sustainable as a green technology showed broad application prospects. But, the technology still has some limitations, such as the single-ph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/14B01J35/02C02F1/30C02F101/38
CPCB01J23/14B01J35/004B01J35/023B01J35/026C02F1/30C02F2101/38C02F2305/10
Inventor 杨瑞琪于欣丁龙华刘宏
Owner UNIV OF JINAN
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