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Nano composite visible-light-induced photocatalyst for degrading organic pollutants and preparation method of nano composite visible-light-induced photocatalyst

A technology of organic pollutants and nanocomposites, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, water pollutants, etc., can solve the problems of difficult coupling of photogenerated electrons and photogenerated holes, and increase the surface active sites of photocatalysts , to achieve the effect of simple operation, good dispersion stability and great application prospects

Pending Publication Date: 2020-08-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention aims at the shortcomings in the process of degrading organic pollutants by the above catalytic oxidation method, and provides a nanocomposite visible light catalyst for degrading organic pollutants. By introducing black phosphorus, phosphorus is loaded on the surface of the photocatalyst, and the substrate The crystal form is distorted to form P-O-Ti bonds, which increases the active sites on the surface of the photocatalyst, which is conducive to the transfer of photogenerated electrons. 5+ With the existence of the electron configuration, the photogenerated electrons are easier to be captured, and the photogenerated electrons and photogenerated holes are difficult to couple, which greatly improves the efficiency of photocatalytic degradation of organic pollutants. When the photocatalyst is recycled for 50 times, the photocatalytic efficiency can still reach reached 97.5%

Method used

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  • Nano composite visible-light-induced photocatalyst for degrading organic pollutants and preparation method of nano composite visible-light-induced photocatalyst
  • Nano composite visible-light-induced photocatalyst for degrading organic pollutants and preparation method of nano composite visible-light-induced photocatalyst
  • Nano composite visible-light-induced photocatalyst for degrading organic pollutants and preparation method of nano composite visible-light-induced photocatalyst

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Effect test

Embodiment 1

[0041] The composition of a nano composite visible light catalyst for degrading organic pollutants includes photocatalyst, black phosphorus and deionized water, and its specific formula is shown in the following table:

[0042]

[0043] The nanocomposite visible light catalyst for degrading organic pollutants is mainly used to degrade RhB and is prepared by an ultrasonic stripping method. The specific preparation steps are as follows:

[0044] (1) First, place the massive black phosphorus in an agate mortar and grind for 4 hours to obtain black phosphorus powder. Use deionized water accounting for 45% of the total deionized water as a dispersant, stir to mix evenly, and obtain the third Dispersion, the solid content of the dispersion is 1.83mg / mL; the power of the cell pulverizer is set to 400W, and the treatment time is 6h to obtain the fourth dispersion; then the ultrasonic cleaning instrument is used to continue ultrasonication for 8h, and the power is set to 100W; finally at 600...

Embodiment 2

[0050] The composition of a nano composite visible light catalyst for degrading organic pollutants includes photocatalyst, black phosphorus, and deionized water. The specific formula is shown in the following table:

[0051]

[0052]

[0053] The nanocomposite visible light catalyst for degrading organic pollutants is mainly used to degrade RhB and is prepared by an ultrasonic stripping method. The specific preparation steps are as follows:

[0054] (1) First, place the massive black phosphorus in an agate mortar and grind for 4 hours to obtain black phosphorus powder. Use deionized water accounting for 45% of the total deionized water as a dispersant, stir to mix evenly, and obtain the third The dispersion liquid, the solid content of the dispersion liquid is 4.1mg / mL; the power of the cell pulverizer is set to 450W, and the fourth dispersion liquid is obtained after 7 hours of treatment, and then the ultrasonic cleaner is used to continue ultrasonication for 9 hours, and the power...

Embodiment 3

[0060] A nano composite visible light catalyst for degrading organic pollutants is composed of a photocatalyst, black phosphorus, and deionized water, and its specific formula is as follows:

[0061]

[0062] The nanocomposite visible light catalyst for degrading organic pollutants is mainly used to degrade MB and is prepared by ultrasonic stripping method. The specific preparation steps are as follows:

[0063] (1) First, place the massive black phosphorus in an agate mortar and grind for 4 hours to obtain black phosphorus powder. Use deionized water accounting for 45% of the total deionized water as a dispersant, stir to mix evenly, and obtain the third Dispersion liquid, the solid content of the dispersion liquid is 5.0mg / mL; the power used for the cell pulverizer is set to 600W, and the processing time is 8.5h to obtain the fourth dispersion liquid; then the ultrasonic cleaner is used to continue sonicating for 10.5h, and the power is set to 135W ; Finally, centrifuge at a rate...

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Abstract

The invention discloses a nano-composite visible-light-induced photocatalyst for degrading organic pollutants. The nano-composite visible-light-induced photocatalyst is prepared from the following components in percentage by mass: 0.2-5% of a photocatalyst, 0.01-1% of black phosphorus and 94-99.79% of deionized water, the invention also discloses a preparation method of the nano composite visible-light-induced photocatalyst for degrading organic pollutants and a photocatalysis device. Compared with the prior art, the invention has the following outstanding effects that organic pollutants can be completely degraded, the efficiency can still reach 97.5% after 50 times of cyclic degradation, and the invention has a huge application prospect in the field of sewage treatment.

Description

Technical field [0001] The invention relates to the field of photocatalytic two-dimensional materials, in particular to a nanocomposite visible light catalyst capable of efficiently degrading organic pollutants and a preparation method thereof. Background technique [0002] Organic pollutants are common in water and affect the ecosystem in the form of toxicity and reduction of dissolved oxygen in water. At the same time, it can also spread along the food chain, accumulate in the fat in the animal body, and indirectly cause allergies, congenital defects, cancer and other symptoms to people's bodies, and endanger human health. According to the International Agency for Research on Cancer (IARC) chemical carcinogenic risk assessment, ingestion, inhalation and skin contact with the substance will cause acute and chronic poisoning. In view of the many hazards of organic pollutants, many current documents have proposed methods to control organic pollutant pollution. According to the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18B01J27/182B01J27/187B01J37/34C02F1/72C02F101/30
CPCB01J27/18B01J27/182B01J27/187B01J37/343C02F1/725C02F2101/30C02F2305/10B01J35/40B01J35/39
Inventor 谢德龙朱瑞徐杜兵朱远蹠朵云霞梅毅
Owner KUNMING UNIV OF SCI & TECH