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Synthetic method of supported silver phosphate photocatalyst

A synthesis method and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effects of improving degradation efficiency, increasing adsorption capacity, and easy separation

Inactive Publication Date: 2012-07-25
常州东缘环境修复科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silver phosphate is a solid salt, and it is difficult to fix it directly between the bentonite layers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take by weighing 1mmol silver nitrate, be configured into 10mmol / L solution, add dropwise dilute ammonia water in this solution, shake while dropping, until the precipitation that appears at first just dissolves completely again, obtain silver ammonia solution; Take by weighing 20 g bentonite, Add 80 mL of distilled water to soak for 10 hours, add the previously obtained silver ammonia solution to the soaked bentonite suspension, stir while adding, continue stirring for 3 hours after the addition is completed, and age in a water bath at 80°C for 24 hours after stirring. After aging, wash with water 4 times, add 30mL of distilled water; add 0.01mol / L phosphoric acid dropwise, stir while adding dropwise, continue stirring for 4h after the dropwise addition is completed, the molar ratio of the amount of phosphoric acid added to the silver nitrate used is 1: 3. Aging in a water bath at 60°C for 24 hours after stirring, and washing with water several times after aging until t...

Embodiment 2

[0019] Weigh 1.2 mmol of silver nitrate, configure it into a 15 mmol / L solution, add dilute ammonia water dropwise to the solution, and oscillate while adding dropwise, until the initial precipitate just dissolves completely, to obtain a silver ammonia solution; weigh 20 g Bentonite, add 100 mL of distilled water and soak for 12 h, add the previously obtained silver ammonia solution into the soaked bentonite suspension, stir while adding, continue stirring for 4 h after the addition is completed, and place in a water bath at 85 Aging at ℃ for 24 hours, washing with water 5 times after aging, adding 30mL of distilled water; adding 0.01 mol / L phosphoric acid to it, stirring while dropping, and continuing to stir for 4 hours after the addition is completed. The molar ratio is 1:3. After stirring, it is aged in a water bath at 60-65 °C for 24 hours. After aging, it is washed several times with water until the supernatant is neutral. Then dry it at 105° C. to obtain a supported sil...

Embodiment 3

[0022] Weigh 1mmol of silver nitrate and configure it into a 12 mmol / L solution, add dilute ammonia water dropwise to the solution, shake while adding dropwise, until the initial precipitate just dissolves completely, and the silver ammonia solution is obtained. Weigh 20 g of bentonite, add 90 mL of distilled water to soak for 11 h, add the previously obtained silver ammonia solution dropwise into the soaked bentonite suspension, stir while adding, continue stirring for 4 h after the addition is completed, and finish stirring After aging in a water bath at 85 °C for 24 hours, after aging, wash with water 4 times, add 40 mL of distilled water; add 0.05 mol / L phosphoric acid dropwise, stir while adding, continue stirring for 4 hours after the dropwise addition, the amount of phosphoric acid added is the same as The molar ratio of silver nitrate used was 1:3. After the stirring was completed, it was aged in a water bath at 62 °C for 24 hours. After the aging, it was washed several...

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PUM

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Abstract

The invention discloses a synthetic method of a supported silver phosphate photocatalyst. The method comprises the following steps of: weighing 1-1.2mmol of silver nitrate, preparing into 10-15mmol / L of solution, and dropwise adding diluted ammonia water to obtain a silver ammonia solution; weighing 20g of bentonite, adding 80-100mL of distilled water, soaking for 10-12 hours to obtain a bentonite suspension, dropwise adding the silver ammonia solution into the bentonite suspension, continually stirring for 3-4 hours, ageing in a water bath of 80-85 DEG C for 24 hours, washing with water for 4-5 times, and adding 30-50mL of distilled water; and dropwise adding 0.01-0.1mol / L of phosphoric acid into an obtained product in the molar ratio of 1:3 of phosphoric acid to used silver nitrate, ageing in a water bath of 60-65 DEG C for 24 hours, washing with water repeatedly till a supernatant becomes neutral, and drying at the temperature of 105 DEG C to obtain the supported silver phosphate photocatalyst. The adsorption capabilities of the catalyst and a carrier are increased.

Description

[0001] technical field [0002] The invention relates to a synthesis method of a loaded silver phosphate photocatalyst, belonging to the technical field of sewage treatment in environmental protection. Background technique [0003] Traditional water treatment methods have problems such as low efficiency, high cost, and secondary pollution. Sewage treatment has not been well resolved, and the development and application of nanotechnology may completely solve this problem. In 1972, A.Fujishima and K. Honda in the n-type semiconductor TiO 2 The photocatalytic decomposition of water was discovered on the electrode, and since then a large number of photocatalytic degradation of organic matter in wastewater has been studied. [0004] In June 2010, researchers from the Material Research Institute found that silver phosphate has the effect of photocatalyst, and the photooxidation effect is more than ten times that of various known photocatalysts. However, due to the instability of...

Claims

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Application Information

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IPC IPC(8): B01J27/18C02F1/30
Inventor 马建锋李定龙崔冰莹张天立杨彦
Owner 常州东缘环境修复科技有限公司
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