Organic pollutant photodegradation catalyst and preparation method thereof

A technology for organic pollutants and photodegradation, applied in catalyst activation/preparation, physical/chemical process catalysts, water pollutants, etc., can solve problems that threaten human health, public health, serious toxicity, etc., and achieve the degradation of organic pollutants Good effect, good stability, high dispersion effect

Inactive Publication Date: 2020-08-11
ANHUI SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These discharges contain residual dyes that affect water quality and threaten public health. Some azo dyes or their metabolites (such as aromatic amines) are severely toxic and potential carcinogens
Because wastewater containing organic dyes strongly resists microbial degradation, it will inevitably be transformed into toxic or carcinogenic substances, which has become a very serious environmental problem and threatens human health.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of an organic pollutant photodegradation catalyst, comprising the following steps:

[0024] (1) Slowly drop 100mL butyl titanate solution into 600mL absolute ethanol, stir for 10min, then add 3g of manganese sulfate and 1.2g of ferric nitrate, stir for 15min, then slowly add anhydrous acetic acid to adjust the pH to 3 , to obtain a premix.

[0025] (2) Ultrasonic is performed while stirring the premix, the ultrasonic power is 100W; then water is slowly sprayed into the premix through a sprayer, and the injection time is 6 minutes, and the quality of the water sprayed into the premix is ​​the mass of the premix 2.3% of 2.3%; after the water is sprayed, stop the ultrasound and continue to stir for 30 minutes; then let the resultant stand for 8 hours, then vacuum-dry it at 55°C, dry it to constant weight, take it out and grind it, and then put it in a muffle furnace , heated up to 560°C at a speed of 8°C / min, and roasted for 3 hours; cooled to room te...

Embodiment 2

[0027] A preparation method of an organic pollutant photodegradation catalyst, comprising the following steps:

[0028] (1) Slowly drop 100 mL of butyl titanate solution into 450 mL of absolute ethanol, stir for 8 minutes, then add 3.2 g of manganese sulfate and 0.8 g of ferric nitrate, stir for 10 minutes, then slowly add anhydrous acetic acid to adjust the pH to 3.5, get the premix.

[0029] (2) Ultrasonic is carried out while stirring the premix, the ultrasonic power is 80W; then water is slowly sprayed into the premix through the sprayer, and the injection time is 5 minutes, and the quality of the water sprayed into the premix is ​​the mass of the premix 2.5% of 2.5% of water; after spraying the water, stop the ultrasound and continue to stir for 40 minutes; then let the resultant stand for 5 hours, then vacuum-dry it at 50°C, dry it to constant weight, take it out and grind it, and then place it in a muffle furnace , heated up to 550°C at a speed of 5°C / min, and roasted ...

Embodiment 3

[0031] A preparation method of an organic pollutant photodegradation catalyst, comprising the following steps:

[0032] (1) Slowly drop 100mL butyl titanate solution into 700mL absolute ethanol, stir for 5min, then add 2.5g manganese sulfate and 1.5g ferric nitrate, stir for 20min, then slowly add anhydrous acetic acid to adjust the pH to 2.5, get the premix.

[0033] (2) Ultrasonic is performed while stirring the premix, the ultrasonic power is 150W; then water is slowly sprayed into the premix through a sprayer, and the injection time is 7 minutes, and the quality of the water sprayed into the premix is ​​the mass of the premix 2.7% of 2.7%; after the water is sprayed, stop the ultrasound and continue to stir for 50 minutes; then let the resultant stand for 7 hours, then vacuum-dry it at 55°C, dry it to constant weight, take it out and grind it, and then put it in a muffle furnace , heated up to 560°C at a speed of 7°C / min, and roasted for 2.5 hours; cooled to room temperat...

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PUM

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Abstract

The invention provides an organic pollutant photodegradation catalyst and a preparation method thereof. The preparation method comprises the following steps: (1) slowly dropwise adding a butyl titanate solution into absolute ethyl alcohol, stirring, then adding manganese sulfate and ferric nitrate, stirring, adding anhydrous acetic acid to regulate the pH value to 2.5-3.5, and obtaining a premixedsolution; (2) carrying out ultrasonic treatment while stirring the premixed solution, and then slowly spraying water into the premixed solution through a sprayer; after the water is sprayed, stoppingthe ultrasonic treatment, and continuously stirring; standing the obtained product, drying in vacuum, grinding, heating to 530-560 DEG C, and roasting; and grinding and sieving to obtain the organicpollutant photodegradation catalyst manganese/iron co-doped titanium dioxide. The prepared organic pollutant photodegradation catalyst is good in stability and good in organic pollutant degradation effect, and the preparation process is mild in reaction condition, easy to operate and easy for industrial production.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a catalyst for photodegradation of organic pollutants and a preparation method thereof. Background technique [0002] Organic pollutants refer to pollutants composed of natural organic substances in the form of carbohydrates, proteins, amino acids, and fats, and some other biodegradable synthetic organic substances. It can be divided into two categories: natural organic pollutants and synthetic organic pollutants. In addition to inorganic pollutants, the water body also contains a large number of organic pollutants, which affect the ecosystem and endanger human health in the form of toxicity and the reduction of dissolved oxygen in water. Specific organic pollutants refer to those organic compounds that are highly toxic, highly accumulative, refractory, and listed as priority pollutants, with many varieties and low content. Several such substances are described below. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/889B01J35/00B01J37/03B01J37/08B01J37/34C02F1/30C02F101/30
CPCB01J21/063B01J23/8892B01J35/004B01J37/033B01J37/08B01J37/343C02F1/30C02F2101/30C02F2305/10
Inventor 刘磊孙冰清刘伟
Owner ANHUI SCI & TECH UNIV
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