Three-dimensional dendritic silver chloride crystal growing in direction (111) and preparation method thereof, and photocatalyst

Abstract

The invention discloses a high-activity three-dimensional dendritic silver chloride crystal growing in direction (111) and a preparation method of the high-activity three-dimensional dendritic silver chloride crystal. The crystal has a three-dimensional dendritic structure; and the three-dimensional dendritic silver chloride crystal is obtained through the following steps of: dissolving an oxidant in de-ionized water and thoroughly stirring for 2 minutes at the room temperature; adding sodium chloride to the stirred solution and evenly mixing the mixture by stirring for 2 minutes; next, adding citric acid to the mixed solution, stirring for 2 minutes, and then putting a silver slide into the solution for reaction at the room temperature for 2-4 hours, thereby obtaining the target product. The invention also provides a photocatalyst prepared from the silver chloride crystals under illumination. The preparation method of the high-activity three-dimensional dendritic silver chloride crystal is simple in synthesis method and steps; the product is good in uniformity and suitable for large-scale production; the synthesized three-dimensional dendritic silver chloride crystal has surfaces formed by high-index crystal faces, and is high in surface activity; and the photocatalyst formed from the silver chloride crystals under illumination has strong catalytic activity.

Description

technical field

[0001] The invention relates to a silver chloride crystal, in particular to a three-dimensional branched silver chloride crystal growing in a <111> direction, a preparation method and a photocatalyst, which can be used in the environmental protection field of visible light degradation of organic pollutants and photolysis of water for oxygen production. Background technique

[0002] In recent years, environmental pollution and energy shortage have become the most serious problems in the world today, and social development and human survival have been seriously threatened. The emerging semiconductor photocatalysis technology can use sunlight to degrade organic pollutants, and can also photolyze water to produce oxygen and hydrogen, which provides a possible way to solve two major problems in the world. At present, most of the research on semiconductor photocatalytic materials is focused on the preparation and exploration of photocatalytic materials that r...

Examples

Embodiment 1

[0036] Measure 100mL of deionized water into the beaker, add 0.091g of sodium chlorite into the above solution, stir for 2 minutes to fully dissolve the solid, then add 0.029g of sodium chloride into the above solution, and stir for 2 minutes. Then add 0.115 g of citric acid solution and stir for 2 minutes to make the solution evenly mixed. Finally, put 2×2 cm silver flakes into the above solution, react at room temperature for 2 hours, take out the silver flakes, wash and dry the surface, and obtain the product three-dimensional dendritic silver chloride crystals on the surface of the silver flakes. Take 0.2g of three-dimensional dendritic silver chloride crystals and put them into 100mL of deionized water, stir continuously for 1h under the irradiation of a 500W xenon lamp, then filter, wash and dry to form a photocatalyst.

[0037] attached figure 1 (b) is the X-ray diffraction figure of the product on the silver sheet of embodiment 1 gained, as can be seen from the figure...

Embodiment 2

[0040] Measure 100mL of deionized water into the beaker, add 0.091g of sodium chlorite into the above solution, stir for 2 minutes to fully dissolve the solid, then add 0.029g of sodium chloride into the above solution, and stir for 2 minutes. Then add 0.115 g of citric acid solution and stir for 2 minutes to make the solution evenly mixed. Finally, 2×2 cm silver flakes were put into the above solution, reacted at room temperature for 4 hours, the silver flakes were taken out to wash and dry the surface, and the product three-dimensional dendritic silver chloride crystals were obtained on the surface of the silver flakes. Take 0.2g of three-dimensional dendritic silver chloride crystals and put them into 100mL of deionized water, stir continuously for 1h under the irradiation of 500W xenon lamp, then filter, wash and dry to form a photocatalyst

[0041] attached image 3 It is the X-ray diffraction figure of this implementation gained product, know by figure, this product is ...

Embodiment 3

[0043] Measure 100mL of deionized water into the beaker, add 0.091g of sodium chlorite into the above solution, stir for 2 minutes to fully dissolve the solid, then add 0.029g of sodium chloride into the above solution, and stir for 2 minutes. Then add 0.115 g of citric acid solution and stir for 2 minutes to make the solution evenly mixed. Finally, 2×2 cm silver flakes were put into the above solution, and reacted at room temperature for 2 hours, and the silver flakes were taken out to wash and dry the surface, and the product three-dimensional dendritic silver chloride crystals were obtained on the surface of the silver flakes.

technical field

[0001] The invention relates to a silver chloride crystal, in particular to a three-dimensional branched silver chloride crystal growing in a <111> direction, a preparation method and a photocatalyst, which can be used in the environmental protection field of visible light degradation of organic pollutants and photolysis of water for oxygen production. Background technique

[0002] In recent years, environmental pollution and energy shortage have become the most serious problems in the world today, and social development and human survival have been seriously threatened. The emerging semiconductor photocatalysis technology can use sunlight to degrade organic pollutants, and can also photolyze water to produce oxygen and hydrogen, which provides a possible way to solve two major problems in the world. At present, most of the research on semiconductor photocatalytic materials is focused on the preparation and exploration of photocatalytic materials that r...

Examples

Embodiment 1

[0036] Measure 100mL of deionized water into the beaker, add 0.091g of sodium chlorite into the above solution, stir for 2 minutes to fully dissolve the solid, then add 0.029g of sodium chloride into the above solution, and stir for 2 minutes. Then add 0.115 g of citric acid solution and stir for 2 minutes to make the solution evenly mixed. Finally, put 2×2 cm silver flakes into the above solution, react at room temperature for 2 hours, take out the silver flakes, wash and dry the surface, and obtain the product three-dimensional dendritic silver chloride crystals on the surface of the silver flakes. Take 0.2g of three-dimensional dendritic silver chloride crystals and put them into 100mL of deionized water, stir continuously for 1h under the irradiation of a 500W xenon lamp, then filter, wash and dry to form a photocatalyst.

[0037] attached figure 1 (b) is the X-ray diffraction figure of the product on the silver sheet of embodiment 1 gained, as can be seen from the figure...

Embodiment 2

[0040] Measure 100mL of deionized water into the beaker, add 0.091g of sodium chlorite into the above solution, stir for 2 minutes to fully dissolve the solid, then add 0.029g of sodium chloride into the above solution, and stir for 2 minutes. Then add 0.115 g of citric acid solution and stir for 2 minutes to make the solution evenly mixed. Finally, 2×2 cm silver flakes were put into the above solution, reacted at room temperature for 4 hours, the silver flakes were taken out to wash and dry the surface, and the product three-dimensional dendritic silver chloride crystals were obtained on the surface of the silver flakes. Take 0.2g of three-dimensional dendritic silver chloride crystals and put them into 100mL of deionized water, stir continuously for 1h under the irradiation of 500W xenon lamp, then filter, wash and dry to form a photocatalyst

[0041] attached image 3 It is the X-ray diffraction figure of this implementation gained product, know by figure, this product is ...

Embodiment 3

[0043] Measure 100mL of deionized water into the beaker, add 0.091g of sodium chlorite into the above solution, stir for 2 minutes to fully dissolve the solid, then add 0.029g of sodium chloride into the above solution, and stir for 2 minutes. Then add 0.115 g of citric acid solution and stir for 2 minutes to make the solution evenly mixed. Finally, 2×2 cm silver flakes were put into the above solution, and reacted at room temperature for 2 hours, and the silver flakes were taken out to wash and dry the surface, and the product three-dimensional dendritic silver chloride crystals were obtained on the surface of the silver flakes.

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