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Piezoelectric catalytic degradation and ammonia synthesis catalyst and preparation method and application thereof

A catalytic degradation and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of impracticability and limited application range, and achieve the improvement of piezoelectric catalytic synthesis of ammonia and piezoelectric Effect of degrading dye properties

Active Publication Date: 2021-01-22
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of piezoelectric catalytic degradation with efficient piezoelectric catalytic degradation of methyl orange and piezoelectric catalytic ammonia synthesis activity in order to solve the defect that the photocatalytic mode cannot be implemented in the absence of light and the scope of application is limited. , Synthetic ammonia catalyst, that is, the catalytic process converts mechanical energy into chemical energy to degrade dyes and synthesize nitrogen into ammonia

Method used

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  • Piezoelectric catalytic degradation and ammonia synthesis catalyst and preparation method and application thereof
  • Piezoelectric catalytic degradation and ammonia synthesis catalyst and preparation method and application thereof
  • Piezoelectric catalytic degradation and ammonia synthesis catalyst and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0033] This embodiment provides a method for preparing a catalyst for piezoelectric catalytic degradation and synthesis of ammonia, the steps of which include:

[0034] 1) Weigh 0.970g of bismuth nitrate pentahydrate and 0.332g of potassium iodide, respectively pour it into a beaker containing 20mL of ethylene glycol, and stir on a magnetic stirrer for 30 minutes. Then the potassium iodide solution was added dropwise into the beaker containing the bismuth nitrate pentahydrate solution, and stirred on a magnetic stirrer for 30 minutes to fully dissolve it. Then the mixed solution was transferred to a 100 mL polytetrafluoroethylene autoclave, and the autoclave was sealed in a stainless steel tank, and hydrothermally reacted at 160° C. for 17 hours. After hydrothermal heating and natural cooling, the obtained precipitate was washed with water and alcohol, dried at 60°C for 24 hours, and the evaporated sample was transferred to a mortar for grinding for 30 minutes to obtain a prec...

Embodiment 2

[0037] This embodiment provides a method for preparing a catalyst for piezoelectric catalytic degradation and synthesis of ammonia, the steps of which include:

[0038] 1) with the step of (1) in embodiment 1

[0039] 2) Weigh 0.662g of silver nitrate and configure it into a silver nitrate solution with a concentration of 6.62mg / mL. Then weigh 1.000g of Bi 5 o 7 1, it is poured into the beaker that 10mL methanol and 40mL deionized water are housed, and the silver nitrate solution that measures 0.5mL is added this beaker, while stirring in the dark, logical nitrogen 40 minutes. After the nitrogen flow was stopped, the beaker was placed under a 300W xenon lamp and illuminated for 30 minutes while stirring. After the light is finished, the obtained precipitate is washed with water and alcohol, dried at 60°C for 24 hours, and the evaporated sample is transferred to a mortar and ground for 30 minutes to obtain the target product 2.5%Ag / Bi 5 o 7 I.

Embodiment 3

[0041]This embodiment provides a method for preparing a catalyst for piezoelectric catalytic degradation and synthesis of ammonia, the steps of which include:

[0042] 1) with the step of (1) in embodiment 1

[0043] 2) Weigh 0.662g of silver nitrate and configure it into a silver nitrate solution with a concentration of 6.62mg / mL. Then weigh 1.000g of Bi 5 o 7 1, it is poured into the beaker that 10mL methanol and 40mL deionized water are housed, and the silver nitrate solution that measures 1.0mL is added this beaker, while stirring in the dark, logical nitrogen 40 minutes. After the nitrogen flow was stopped, the beaker was placed under a 300W xenon lamp and illuminated for 30 minutes while stirring. After the light is finished, wash the obtained precipitate with water and alcohol, dry at 60°C for 24 hours, transfer the evaporated sample to a mortar and grind for 30 minutes to obtain the target product 5%Ag / Bi 5 o 7 I.

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Abstract

The invention provides piezoelectric catalytic degradation and synthesis ammonia catalyst with efficient piezoelectric catalytic degradation methyl orange and piezoelectric catalytic synthesis ammoniaactivity and a preparation method and application thereof. The general formula of the catalyst is xAg / Bi5O7I, x is the molar ratio of Ag to Bi5O7I in the catalyst, and x is larger than or equal to 1and smaller than or equal to 7.5. The Bi5O7I material is applied to piezoelectric catalytic degradation of dye methyl orange and nitrogen fixation, methyl orange is degraded under the action of ultrasonic vibration, and N2 is catalytically reduced into ammonia. In addition, precious metal Ag is deposited on the surface of Bi5O7I through a photodeposition method, and the piezoelectric catalytic synthesis ammonia and piezoelectric dye degradation performance of Bi5O7I is further improved.

Description

technical field [0001] The invention relates to the field of photocatalysts, and relates to a piezoelectric catalytic degradation and ammonia synthesis catalyst with high-efficiency piezoelectric catalytic degradation of methyl orange and piezoelectric catalytic ammonia synthesis activity, and a preparation method and application thereof. Background technique [0002] With the improvement of living standards, people pay more and more attention to the natural environment. Semiconductor photocatalysis technology is a kind of environmental purification technology with high potential in recent years. It has the characteristics of high efficiency, safety and low emission. As early as 1972, Japanese scientists Fujishima and Honda accidentally discovered in the experiment of metal photosynthesis that, under the irradiation of ultraviolet light, the rutile TiO 2 The prepared cathode has H 2 The production of semiconductors has thus created a precedent for semiconductor photocatalys...

Claims

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Application Information

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IPC IPC(8): B01J27/06B01J35/00B01J37/16B01J37/34C01C1/02C02F1/36
CPCB01J27/06B01J37/16B01J37/344C02F1/36C01C1/026C02F2101/308B01J35/39Y02P20/52
Inventor 何益明陈璐张雯倩王军峰李晓静
Owner ZHEJIANG NORMAL UNIVERSITY
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