Perylenebisimide and composite photocatalytic material thereof, preparation method and application of perylenebisimide and composite photocatalytic material in removal of organic pollutants in water body

A composite photocatalysis and perylene imide technology, applied in water pollutants, chemical instruments and methods, light water/sewage treatment, etc., can solve problems such as increasing economic costs and aggravating metal ion pollution, achieving low cost and promoting Adsorption and surface catalytic reaction, skeleton stabilization effect

Active Publication Date: 2020-04-14
SUZHOU UNIV
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  • Description
  • Claims
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Problems solved by technology

Although inorganic semiconductor material photocatalysts have the characteristics of good catalytic activity and wide application environment, most of them are metal-based semiconductor materials. These semiconductor materials will not only increase economic costs due to mass production, but also aggravate metal ion pollution.

Method used

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  • Perylenebisimide and composite photocatalytic material thereof, preparation method and application of perylenebisimide and composite photocatalytic material in removal of organic pollutants in water body
  • Perylenebisimide and composite photocatalytic material thereof, preparation method and application of perylenebisimide and composite photocatalytic material in removal of organic pollutants in water body
  • Perylenebisimide and composite photocatalytic material thereof, preparation method and application of perylenebisimide and composite photocatalytic material in removal of organic pollutants in water body

Examples

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preparation example Construction

[0032] The preparation method of perylene imide / bismuth tungstate composite photocatalytic material is as follows:

[0033] (1) Calcining melamine to obtain melem; then mixing melem, perylenetetracarboxylic dianhydride, and a solvent to obtain a mixture, and then subjecting the mixture to a solvothermal reaction in an inert atmosphere to obtain peryleneimide;

[0034] (2) Dispersing the peryleneimide in step (1) into an aqueous solution containing a bismuth source and a tungsten source, and performing a hydrothermal reaction to obtain a peryleneimide / bismuth tungstate composite photocatalytic material.

Embodiment 1

[0036] The present invention first adopts the method of high-temperature calcination to synthesize melem. First, 5 g of melamine was weighed and placed in a 25 mL porcelain crucible with a cover; then, it was covered and placed in a muffle furnace with a heating rate of 5 °C / min (from room temperature to 425 °C), in an air atmosphere Calcined at 425 °C for 4 h, after cooling to room temperature, the light yellow product was centrifuged and washed 3 times with absolute ethanol, and then dried in a vacuum oven at 60 °C for 12 h to obtain melem. The perylene imide was then synthesized by a solvothermal method. First, weigh 88.1 mg of melem and 235.8 mg of perylenetetracarboxylic dianhydride in a 10 mL ground-mouth reaction flask, then add 10 mL of DMF / EG (volume ratio 1:1) mixed solvent, and ultrasonically disperse for 1 h; then , passed through argon for protection, and after checking the airtightness, placed it in a blast drying oven at 200 °C for 120 h. After the reaction wa...

Embodiment 2

[0038] The preparation of peryleneimide / bismuth tungstate composite photocatalytic material (PI@BWO) is as follows:

[0039] The present invention uses cetyltrimethylammonium bromide (CTAB) as a template agent to grow bismuth tungstate nanosheets on the surface of peryleneimide through a hydrothermal method, thereby obtaining peryleneimide / bismuth tungstate composite light Catalytic materials (PI@BWO). First, weigh 48.5 mg bismuth nitrate pentahydrate and 16.5 mg sodium tungstate dihydrate, add 5 mg hexadecyltrimethylammonium bromide dissolved in 35 mL deionized water to disperse with magnetic stirring for 30 min; then weigh again Take 30 mg of peryleneimide (prepared in Example 1) in the above mixed solution, continue stirring for 30 min to obtain a uniformly dispersed dark red suspension, and then ultrasonically disperse for 1 h; finally, transfer the mixed solution to a 50 mL poly In a tetrafluoroethylene-lined autoclave, the reaction was carried out at 120 °C for 24 h. A...

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Abstract

The invention discloses perylenebisimide, a composite photocatalytic material thereof, a preparation method of the composite photocatalytic material and application of the composite photocatalytic material in removal of organic pollutants in a water body. The method comprises: calcining melamine to obtain melem; mixing the melem, perylenetetracarboxylicdianhydride and a solvent to obtain a mixture, and performing solvothermal reaction on the mixture in an inert atmosphere to obtain thebisimide; and dispersing the perylenebisimide into an aqueous solution containing a bismuth source and a tungsten source and carrying out hydrothermal reaction toobtain the perylenebisimide / bismuth tungstate composite photocatalytic material. According to the organic-inorganic composite photocatalytic material constructed by the invention, on one hand, the composite photocatalytic material has a wider spectral response range due to the introduction of a visible-light-responsive organic photocatalytic material; on the other hand, due to the introduction of an inorganic semiconductor catalyst, the composite material can generate active free radicals with higher oxidability, and the photocatalytic degradation performance of the composite material on the organic pollutants is enhanced, so that the constructed organic-inorganic composite photocatalytic material has excellent catalytic performance.

Description

technical field [0001] The invention belongs to the field of organic-inorganic nanocomposite materials, and at the same time relates to the field of photocatalytic oxidation, in particular to a peryleneimide / bismuth tungstate organic-inorganic composite photocatalytic material based on peryleneimide, its preparation method and its application in light Catalytic removal of organic pollutants in water applications. Background technique [0002] With the development of industrial production, human beings directly or indirectly discharge harmful substances to the environment that exceed their self-purification capabilities, which seriously deteriorates our living environment, and environmental pollution has become an increasingly urgent problem to be solved. As a new type of clean technology, photocatalysis provides new ideas and new ways for environmental governance. Photocatalytic technology can convert low-density solar energy into high-density electrical energy and chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J31/34C02F1/30C02F101/34
CPCB01J35/004B01J31/0247B01J31/0271B01J31/34C02F1/30C02F2305/10C02F2101/345Y02W10/37B01J23/31B01J37/343B01J37/0215B01J35/0013B01J37/0219C02F2101/32C02F1/725C02F1/32B01J31/069B01J37/08
Inventor 路建美李娜君
Owner SUZHOU UNIV
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