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Preparation method and application of self-supporting block photocatalyst

A photocatalyst and self-supporting technology, which is applied in the field of photocatalytic materials, can solve the problems that cannot be recycled, red phosphorus is difficult to recycle, etc., and achieve the effect of easy recycling and effective degradation

Inactive Publication Date: 2018-06-22
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a preparation method and application of a self-supporting block photocatalyst, which is used to solve the technical defects that red phosphorus is difficult to recycle and cannot be recycled when used as a photocatalyst in the prior art

Method used

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  • Preparation method and application of self-supporting block photocatalyst
  • Preparation method and application of self-supporting block photocatalyst
  • Preparation method and application of self-supporting block photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This example is a specific example of preparing the self-supporting bulk photocatalyst product 1 .

[0035] Add 2g of ordinary red phosphorus into a 20ml polytetrafluoroethylene-lined reaction kettle, add 15ml of water, place in an oven, and heat at a constant temperature of 100°C for 24h. The obtained solid product was centrifuged, washed, and dried in sequence to obtain the powdered purified product 1, which was placed in a desiccator for later use. Among them, the purity of the purified product 1 is greater than 99%.

[0036] After dissolving 0.05g of silver salt in 5ml of water, mix with 0.1g of purified product 1 to obtain suspension 1; wherein, the mixing method is: ultrasonic oscillation; the temperature of ultrasonic oscillation is 20°C, and the time of ultrasonic oscillation is 15min.

[0037] The suspension 1 was transferred to a 20ml polytetrafluoroethylene-lined high-pressure reactor, and the reactor was placed in an oven for hydrothermal reaction, and heat...

Embodiment 2

[0041] This example is a specific example of preparing the self-supporting block photocatalyst product 2.

[0042] Add 2g of ordinary red phosphorus into a 20ml polytetrafluoroethylene-lined reaction kettle, add 15ml of water, place in an oven, and heat at a constant temperature of 200°C for 15h. The obtained solid product was successively centrifuged, washed, and dried to obtain the powdered purified product 2, which was placed in a desiccator for later use. Wherein, the purity of the purified product 2 is greater than 99%.

[0043] After dissolving 0.3g of silver nitrate in 10ml of water, mix it with 0.1g of purified product 2 to obtain suspension 2; wherein, the mixing method is: ultrasonic oscillation; the temperature of ultrasonic oscillation is 30°C, and the time of ultrasonic oscillation is 40min.

[0044] The suspension 2 was transferred to a 20ml polytetrafluoroethylene-lined high-pressure reactor, and the reactor was placed in an oven for hydrothermal reaction, and ...

Embodiment 3

[0048] This example is a specific example of preparing the self-supporting bulk photocatalyst product 3 .

[0049] Add 2g of ordinary red phosphorus into a 20ml polytetrafluoroethylene-lined reaction kettle, add 15ml of water, place in an oven, and heat at a constant temperature of 150°C for 2h. The resulting solid product was centrifuged, washed, and dried in sequence to obtain the powdered purified product 3, which was placed in a desiccator for later use. Among them, the purity of the purified product 3 is greater than 99%.

[0050] Dissolve 0.88g of silver salt in 16ml of water, and mix with 1g of purified product 3 to obtain suspension 3; the mixing method is: ultrasonic vibration; the temperature of ultrasonic vibration is 40°C, and the time of ultrasonic vibration is 10 minutes.

[0051] The suspension 3 was transferred to a 20ml polytetrafluoroethylene-lined high-pressure reactor, and the reactor was placed in an oven for hydrothermal reaction, and heated at a constan...

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Abstract

The invention belongs to the technical field of photocatalytic materials and particularly relates to a preparation method and an application of a self-supporting block photocatalyst. The preparation method of the self-supporting block photocatalyst comprises steps as follows: step one, material preparation: after silver salt is dissolved in water, a mixed solution is mixed with red phosphorus, anda suspension is obtained; step two, hydrothermal reaction: the suspension is subjected to the hydrothermal reaction, and a first product is obtained; step three, postprocessing: the first product isdried, and a self-supporting block photocatalyst product is obtained. The invention further provides the application of the product prepared with the method to degradation of organic pollutants in water. The prepared product has block-shaped appearance, can be clamped by tools such as tweezers and the like, and is convenient to recover; meanwhile, experimental determination proves that the prepared product can effectively degrade the organic pollutants in water and can be repeatedly recycled; technical defects that red phosphorus as the photocatalyst is difficult to recover and cannot be recycled in the prior art are overcome.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, in particular to a preparation method and application of a self-supporting bulk photocatalyst. Background technique [0002] Due to its ability to directly utilize sunlight, photocatalytic technology has attracted extensive attention in the field of environmental protection in degrading organic pollutants in water in recent years. At present, the research on high-performance photocatalysts is mainly concentrated on nano-powder materials. Nano-powder photocatalysts have made great progress, but they are difficult to recycle in practical applications, and they need to be loaded in the later stage to be applied, resulting in difficult recycling and high cost of catalysts. . Therefore, there is an urgent need to develop preparation methods and applications of economical, cheap and recyclable supported photocatalysts. [0003] Elemental red phosphorus has been found to be an excelle...

Claims

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Application Information

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IPC IPC(8): B01J27/14B01J37/10B01J37/34B01J37/04B01J35/04C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J27/14B01J37/04B01J37/10B01J37/343C02F2101/34C02F2305/10C02F2101/345C02F2101/38B01J35/56B01J35/39
Inventor 王万军安太成李桂英刘宏利
Owner GUANGDONG UNIV OF TECH
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