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Preparation and application of a kind of goqds/tio2/wo3 photocatalyst

A photocatalyst, 2H2O technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, water/sludge/sewage treatment, etc., can solve the problem of not eliminating toxicity

Active Publication Date: 2021-04-30
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Adsorption method and membrane separation method are commonly used methods to deal with heavy metal endocrine disruptors, which have played a certain enrichment role in the application process, but the valence state of heavy metals has not changed, and the purpose of eliminating toxicity has not been achieved.

Method used

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  • Preparation and application of a kind of goqds/tio2/wo3 photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 30ml of GOQDs solution and sonicate and add 0.3771g of Na 2 WO 4 • 2H 2 O, stir vigorously for about 1h to make Na 2 WO 4 • 2H 2 O is completely dissolved; put 80ml of absolute ethanol on the magnetic stirrer, add 1ml of butyl titanate dropwise while stirring, and add 0.4ml of HF, stir for 30min; mix the two solutions and stir for 1~2h Transfer to a 100ml hydrothermal autoclave for hydrothermal reaction (160°C, 24h), wash the obtained product with pure water and absolute ethanol several times to neutrality, and then dry it in a constant temperature drying oven at 60°C. Get GOQDs / TiO 2 / WO 3 photocatalyst material.

[0017] Take 80ml of reverse osmosis concentrated water for photocatalytic reaction, adjust its pH to 6 and add 35.2mg of GOQDs / TiO 2 / WO 3 Photocatalyst, avoid light and stir for 30 minutes, then transfer to photocatalytic reaction device, measure Cd in reverse osmosis concentrated water after 80 minutes of light 2 + and Pb 2+ Concentration,...

Embodiment 2

[0019] GOQDs / TiO 2 / WO 3 The preparation method of the photocatalyst material is as in Example 1.

[0020] Take 80ml of reverse osmosis concentrated water for photocatalytic reaction, adjust its pH to 7 and add 41.6mg of GOQDs / TiO 2 / WO 3 Photocatalyst, avoid light and stir for 30 minutes, then transfer to photocatalytic reaction device, measure Cd in reverse osmosis concentrated water after 60 minutes of light 2 + and Pb 2+ Concentration, after determination, C(Pb 2+ )=0.007 mg / l, C(Cd 2+ )=0.132 mg / l, Pb 2+ The removal rate: 97.96%, Cd 2+ The removal rate is: 65.85%.

Embodiment 3

[0022] GOQDs / TiO 2 / WO 3 The preparation method of the photocatalyst material is as in Example 1.

[0023] Take 80ml reverse osmosis concentrated water for photocatalytic reaction, adjust its pH to 4 and add 48.0mg of GOQDs / TiO 2 / WO 3 Photocatalyst, avoid light and stir for 30 minutes, then transfer to photocatalytic reaction device, measure Cd in reverse osmosis concentrated water after 40 minutes of light 2 + and Pb 2+ Concentration, after determination, C(Pb 2+ )=0.007 mg / l, C(Cd 2+ )=0.124 mg / l, Pb 2+ The removal rate: 97.96%, Cd 2+ The removal rate is: 67.73%.

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Abstract

What the present invention relates to is a kind of GOQDs / TiO 2 / WO 3 Preparation and application of photocatalysts. The material is based on tungsten trioxide (WO 3 ) nanosheets as the base material, and graphene oxide quantum dots (GOQDs) and titanium dioxide (TiO 2 ) uniform load over the WO 3 On nanosheets, the preparation method is to firstly prepare graphene oxide into GOQDs with uniform size by hydrothermal method, and then use one-step hydrothermal method to synthesize GOQDs / TiO 2 / WO 3 Ternary heterojunction photocatalyst material, improved TiO 2 High photon quantum yield, extended light absorption wavelength, and improved activity of photocatalytic reaction. Then, the mercury lamp was used as the ultraviolet light source, the reverse osmosis concentrated water was used as the raw water, and the heavy metal endocrine disruptors were used as the target pollutants for photocatalytic treatment, and the results were monitored by flame atomic absorption spectrophotometry. The photocatalyst prepared by the invention has high activity, broadens the application of photocatalysis technology in sewage treatment, and provides strong support for removing heavy metal endocrine disruptors in wastewater.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials and water treatment, and relates to photocatalyst GOQDs / TiO 2 / WO 3 preparation and its application in wastewater treatment. Background technique [0002] The application of reverse osmosis technology in the sewage treatment industry is becoming more and more extensive, and the treatment and discharge of reverse osmosis concentrated water has also attracted people's attention. Among them, heavy metal endocrine disruptors in reverse osmosis concentrated water are new pollutants, but their concentration is low, but they have a serious impact on the human body and ecosystem, threatening the health of organisms and humans. Therefore, it is necessary to remove heavy metal endocrine disruptors in reverse osmosis concentrated water has very important practical significance. [0003] Adsorption method and membrane separation method are commonly used methods to deal with heavy metal end...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30C02F1/32C02F101/20
CPCC02F1/32B01J23/002B01J23/30C02F2305/10C02F2101/20B01J35/39
Inventor 卢杰张惠王晓焱李娜韩皓璇
Owner SHANDONG UNIV OF TECH
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