Synthetic method and application of monodisperse silver iodide photocatalyst

A synthesis method and photocatalyst technology, applied in the directions of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of long cycle, non-uniform product size and structure, complex process, etc., and achieve synthesis conditions. Mild, simple equipment, low synthesis temperature effect

Inactive Publication Date: 2014-02-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problems of long period, complicated process, and uneven size and structure of the obtained product in the preparation method of the current silver halide photocatalyst material, and provides a method for rapidly synthesizing a monodisperse silver iodide visible light catalyst with controllable morphology under mild conditions. method

Method used

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  • Synthetic method and application of monodisperse silver iodide photocatalyst
  • Synthetic method and application of monodisperse silver iodide photocatalyst
  • Synthetic method and application of monodisperse silver iodide photocatalyst

Examples

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Embodiment 1

[0039] Preparation of Monodisperse Nano-Silver Iodide Polyhedron Photocatalyst

[0040] Measure 9 mL of deionized water and 1 mL of ethylenediamine into a round bottom flask and mix well. Add 50 mg of polyvinylpyrrolidone and 60 mg of silver acetate into the above-mentioned flask containing the mixed solution of ethylenediamine and water, and dissolve under magnetic stirring at 30°C. Then 5 mL of pre-dissolved 0.422 mM KI aqueous solution was evenly added dropwise into the round bottom flask through a syringe pump at a speed of 1 mL / min. After the dropwise addition was complete, the reaction was continued for 20 min. The product is diluted with deionized water, centrifuged and washed to obtain a monodisperse nano silver iodide polyhedron visible light catalyst.

[0041] figure 1 For the scanning electron microscope picture of the monodisperse nano-silver iodide visible light catalyst prepared in Example 1, it can be seen that the synthesized AgI is a polyhedron with unifo...

Embodiment 2

[0043] Preparation of monodisperse silver iodide nanosphere photocatalyst

[0044] Measure 7 mL of deionized water and 3 mL of ethylenediamine into a round bottom flask and mix well. Add 50 mg of polyvinylpyrrolidone and 60 mg of silver acetate into a round-bottomed flask containing a mixed solution of ethylenediamine and water, and stir to dissolve at 30°C. Then 5 mL of pre-dissolved 0.422 mM KI aqueous solution was evenly added dropwise into the round bottom flask through a syringe pump at a speed of 1 mL / min. After the dropwise addition was completed, the reaction was continued at 30°C for 5 min under magnetic stirring. The product is diluted with deionized water, centrifuged and washed to obtain a monodisperse nano silver iodide visible light catalyst.

[0045] figure 2 For the scanning electron microscope picture of the monodisperse nano-silver iodide visible light catalyst prepared in Example 2, it can be seen that the synthesized AgI is in the shape of a nanospher...

Embodiment 3

[0047] Preparation of Monodisperse Nano-Silver Iodide Concave Photocatalysts

[0048]Measure 9 mL of absolute ethanol and 1 mL of ethylenediamine into a round bottom flask and mix well. Add 50 mg of polyvinylpyrrolidone and 60 mg of silver acetate into a round-bottomed flask containing a mixed solution of ethylenediamine and absolute ethanol, and stir to dissolve at 30 °C. Then 5 mL of pre-dissolved 0.422 mM KI absolute ethanol solution was evenly added dropwise into the round bottom flask through a syringe pump at a speed of 1 mL / min. After the dropwise addition, the reaction was continued at 30 °C for 10 min under magnetic stirring. The product is diluted with deionized water, centrifuged and washed to obtain a monodisperse nano silver iodide visible light catalyst.

[0049] image 3 For the scanning electron microscope picture of the monodisperse nano-silver iodide visible light catalyst prepared in Example 3, it can be seen that the synthesized AgI is a concave shape ...

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Abstract

The invention provides a synthetic method and an application of a monodisperse silver iodide photocatalyst, which is characterized in that ethene diamine is taken as a silver ion control releaser, water or ethanol is taken as a solvent, polyvinylpyrrolidone is taken as a stabilizing agent, a potassium iodide solution is added in an silver acetate solution with certain uniform speed, by adjusting the composition and reaction time of the solvent, the hexagonal silver iodide nano polyhedron, nanosphere or nano concave body with characteristics of uniform size, uniform dispersion and structured shape can be conveniently and rapidly prepared. The synthetic method can solve the problems of tedious process, long period and poor uniformity of product in prior art, the preparation process is simple and rapid, the synthesis condition is mild, the catalyst morphology is controllable, thereby the monodisperse silver iodide photocatalyst is convenient for scale production, and the synthesized catalyst has high visible photocatalytic activity for degrading the organic pollutants.

Description

[0001] technical field [0002] The invention belongs to the technical field of nanometer material synthesis and photocatalysis, and in particular relates to a synthesis method and application of a monodisperse silver iodide photocatalyst. Background technique [0003] Environmental pollution and energy crisis are prominent problems facing the world in the 21st century, which have seriously threatened the survival and development of human beings. How to solve the increasingly serious environmental and energy problems has become a focus of widespread concern and needs to be resolved urgently. Photocatalysis can be used as an ideal environmental management and clean energy production technology due to its deep reaction at room temperature and direct use of solar energy as an energy source. Since the 1970s Fujishima and Honda have n Since hydrogen production by photolysis of water on TiO2-type semiconductor electrodes, semiconductor photocatalysis technology has received exte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/08C02F1/00C02F1/30
Inventor 安长华刘俊学冯娟王淑涛王兆杰张晓云
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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