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Tin-nanoparticle modified oxygenated vacancy tin trioxide nanosheet composite photocatalytic material and preparation method

A technology of tritin tetroxide and composite photocatalysis, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, chemical instrument and method, physical/chemical process catalyst, etc., to achieve simple method, wide application, and increase light energy The effect of utilization

Active Publication Date: 2019-07-30
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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  • Tin-nanoparticle modified oxygenated vacancy tin trioxide nanosheet composite photocatalytic material and preparation method
  • Tin-nanoparticle modified oxygenated vacancy tin trioxide nanosheet composite photocatalytic material and preparation method
  • Tin-nanoparticle modified oxygenated vacancy tin trioxide nanosheet composite photocatalytic material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0027] ② Transfer the above solution to a 50ml reactor and react at 180°C for 12h;

[0028] 3. After the reaction, the reaction kettle was naturally cooled to room temperature, and the obtained product was washed with deionized water and absolute ethanol for 3 to 5 times, and then placed in a constant temperature blast drying oven for 10 hours at 80 ° C. The obtained pale yellow powder was SnO4 nanosheets;

[0029] 4. Take the tin tetroxide nanosheet powder obtained in the above steps in a quartz boat, then place it in a tube furnace, under a mixed atmosphere of h...

Embodiment 2

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

[0032] ② Transfer the above solution to a 50ml reactor and react at 180°C for 12h;

[0033] 3. After the reaction, the reaction kettle was naturally cooled to room temperature, and the obtained product was washed 3 to 5 times with deionized water and absolute ethanol, respectively, and then placed in a constant temperature blast drying oven for 10 hours at 80 ° C. The obtained pale yellow powder was SnO4 nanosheets;

[0034] 4. Take the tin tetroxide nanosheet powder obtained in the above steps in a quartz boat, then place it in a tube furnace, under a mixed atmos...

Embodiment 3

[0036] ①Weigh 5mM stannous chloride dihydrate (SnCl 2 ·2H 2 O, 1.128 g), 12.5 mM sodium citrate dihydrate (Na 3 C 6 H 5 O 7 ·2H 2O, 3.6367g) was dissolved in 12.5ml of deionized water, stirred for 10min, sonicated for 10min, and then added 12.5ml of an aqueous solution containing 0.2M sodium hydroxide to adjust the pH to 5.5. Then sonicate for 30min, stir for 1h, make it completely dispersed and dissolved;

[0037] ② Transfer the above solution to a 50ml reactor and react at 180°C for 12h;

[0038] 3. After the reaction, the reaction kettle was naturally cooled to room temperature, and the obtained product was washed 3 to 5 times with deionized water and absolute ethanol, respectively, and then placed in a constant temperature blast drying oven for 10 hours at 80 ° C. The obtained pale yellow powder was SnO4 nanosheets;

[0039] 4. Take the tin tetroxide nanosheet powder obtained in the above steps in a quartz boat, then place it in a tube furnace, under a mixed atmosp...

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Abstract

The invention discloses a tin-nanoparticle modified oxygenated vacancy tin trioxide nanosheet composite photocatalytic material. The photocatalytic material is based on hydrothermal synthesis of the nanosheet tin trioxide, in situ reduction in a hydrogen atmosphere produces the oxygenated vacancy tin trioxide, and the metal tin modification forms a Schottky junction on its surface. The tin trioxide nanosheet has a diameter of 300-500 nanometre and a thickness of about 20 nanometre; the tin nanoparticles have a diameter of 50-200 nanometre. The photocatalytic material disclosed is combined withthe properties of the Schottky junction and the oxygenated vacancy. On the one hand, the high-quality conductivity of the metal and the metal / semiconductor Schottky junction promote the separation and transport of carriers; on the other hand, oxygen vacancies can capture photogenerated charges and broaden the photoresponse range by reducing a semiconductor band gap. The photocatalyst disclosed has high activity for oxidative degradation of organic pollutants under visible lights, the preparation method thereof is simple, the cost is low, and the industrial application has broad prospects.

Description

technical field [0001] The invention relates to a heterostructured photocatalyst and a preparation method thereof, in particular to a composite photocatalytic material of tin nanoparticle modified with oxygen vacancy tritin tetroxide nanosheets, a preparation method and application thereof, and belongs to the nanomaterial photocatalysis technology field. Background technique [0002] Environmental pollution, especially the pollution of refractory organic dyes, has become a major problem to be solved urgently for human beings. There are many shortcomings in traditional treatment methods, such as biological treatment technology is difficult to completely degrade pollutants; physical and chemical treatment technology has low removal efficiency of pollutants, and may cause secondary pollution. Semiconductor photocatalytic oxidation technology can directly utilize solar energy, and has shown broad application prospects as a green, efficient and sustainable new technology. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14B01J35/02C02F1/30C02F101/38B01J35/00
CPCB01J23/14C02F1/30C02F2305/10C02F2101/38B01J35/39B01J35/40B01J35/50
Inventor 杨瑞琪于欣丁龙华刘宏
Owner UNIV OF JINAN
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