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Composite photocatalyst as well as preparation method and application thereof

A catalyst and composite light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of poor catalyst stability, inability to reuse, poor catalyst activity, etc., and achieve strong oxidation resistance. , Solve the effect of easy loss and large specific surface area

Inactive Publication Date: 2020-02-04
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of slow reaction rate, poor catalyst activity, poor catalyst stability and inability to be reused in the catalysts commonly used in the prior art to degrade organic pollutants by Fenton oxidation, the invention provides a composite photocatalyst And its preparation method and application

Method used

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  • Composite photocatalyst as well as preparation method and application thereof
  • Composite photocatalyst as well as preparation method and application thereof
  • Composite photocatalyst as well as preparation method and application thereof

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Embodiment 1

[0036] Embodiments of the present invention provide a method for preparing a composite photocatalyst, comprising the following steps:

[0037] Step 1. Weigh 1.0 g of iron phthalocyanine monomer (FePc) and grind it fully in an agate mortar, put it into a tube furnace, and under the protection of nitrogen atmosphere, raise the temperature to 600 °C at a heating rate of 3 °C / min, and Roasting at this temperature for 2 hours at a constant temperature to obtain metal phthalocyanine polymer (FePPc); wherein, the flow rate of nitrogen gas is 100cm 3 / min;

[0038] Step 2. Weigh melamine and the iron phthalocyanine polymer according to the mass ratio of 0.11:1, put them into an agate mortar and grind them thoroughly, and put the mixture of the two into a high-temperature-resistant quartz boat, and place it horizontally In a tube furnace, the temperature was raised to 500° C. at a rate of 2.3° C. / min, and roasted at a constant temperature at this temperature for 4 hours. After the roa...

Embodiment 2

[0046] Embodiments of the present invention provide a method for preparing a composite photocatalyst, comprising the following steps:

[0047] Step 1. Weigh 1.0g of iron phthalocyanine monomer and grind it fully in an agate mortar, put it into a tube furnace, and under the protection of nitrogen atmosphere, raise the temperature to 550°C at a heating rate of 2°C / min, and keep at this temperature Roasting at constant temperature for 3 hours to obtain metal phthalocyanine polymer; wherein, the flow rate of nitrogen gas is 50cm 3 / min;

[0048] Step 2. Weigh melamine and the iron phthalocyanine polymer according to the mass ratio of 0.05:1, put them into an agate mortar and grind them thoroughly, and put the mixture of the two into a high-temperature-resistant quartz boat, and place it horizontally In a tube furnace, the temperature was raised to 600° C. at a rate of 5° C. / min, and roasted at a constant temperature for 3 hours at this temperature. After the roasting was complete...

Embodiment 3

[0051] Embodiments of the present invention provide a method for preparing a composite photocatalyst, comprising the following steps:

[0052] Step 1. Weigh 1.0g of iron phthalocyanine monomer, grind it fully in an agate mortar, put it into a tube furnace, and under the protection of nitrogen atmosphere, raise the temperature to 700°C at a heating rate of 5°C / min, and keep at this temperature Roasting at a constant temperature for 0.5h to obtain a metal phthalocyanine polymer; wherein, the flow rate of nitrogen gas is 200cm 3 / min;

[0053] Step 2. Weigh melamine and the iron phthalocyanine polymer according to the mass ratio of 0.43:1, put them into an agate mortar and grind them thoroughly, and put the mixture of the two into a high-temperature-resistant quartz boat, and place it horizontally In a tube furnace, the temperature was raised to 400° C. at a rate of 2° C. / min, and roasted at a constant temperature at this temperature for 6 hours. After the roasting was completed...

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Abstract

The invention relates to the technical field of material preparation, and particularly discloses a composite photocatalyst as well as a preparation method and an application thereof. The preparation method of the composite photocatalyst comprises the following steps: roasting a phthalocyanine metal monomer in an inert atmosphere to obtain a phthalocyanine metal polymer; and mixing the phthalocyanine metal polymer with a graphite-phase carbon nitride precursor, and roasting in an inert atmosphere to obtain the composite photocatalyst. According to the prepared composite catalyst system, the twomaterials of the g-C3N4 quantum dots and the phthalocyanine polymer can be effectively connected, and effective contact and uniform loading of the two materials are realized; meanwhile, a transfer channel of photo-induced electrons can be synchronously constructed, so that the photo-induced electrons are transferred to metals of a phthalocyanine ring from the g-C3N4 semiconductor material througha pi-pi conjugate channel, regeneration of active components is promoted in an external electron adding form, and the photo-Fenton reaction efficiency and the regeneration capacity of the catalyst are improved.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a composite photocatalyst and its preparation method and application. Background technique [0002] Fenton oxidation technology is a more practical technology for treating toxic, harmful and refractory organic pollutants. The system composed of ferrous ions and hydrogen peroxide is the traditional Fenton reagent commonly used at present. It can generate strong oxidizing hydroxyl radicals, and generate organic free radicals with refractory organic matter in aqueous solution to destroy its structure, and finally oxidize and decompose. . Fenton oxidation technology has been widely used due to the advantages of mild reaction conditions, simple operation, and strong oxidation ability. However, the Fenton reaction has problems such as easy loss of iron ions, low regeneration efficiency, and short service life of catalysts, which limit its further large-scale application. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C02F1/30C02F1/72C02F101/38
CPCB01J27/24C02F1/30C02F1/725C02F1/722C02F2101/38C02F2305/10C02F2305/026B01J35/613B01J35/39
Inventor 牛建瑞丁鹏佳何壮李再兴胡广志岳子涵
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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