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Preparation method and application of visible-light response iron oxide doped nitrogen-deficient carbon nitride composite material

A composite material and visible light technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, and water treatment of special compounds, can solve the problems of easy recombination of photogenerated carriers, reduced photocatalytic activity, and low photocatalytic efficiency. The raw materials are cheap and easy to obtain, convenient for mass production, and the effect of simple process

Inactive Publication Date: 2019-09-17
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pure g-C 3 N 4 The photocatalytic efficiency under visible light is not high, the reason is that g-C 3 N 4 In the limited absorption range of visible light, photogenerated carriers are easy to recombine, resulting in reduced photocatalytic activity

Method used

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  • Preparation method and application of visible-light response iron oxide doped nitrogen-deficient carbon nitride composite material
  • Preparation method and application of visible-light response iron oxide doped nitrogen-deficient carbon nitride composite material
  • Preparation method and application of visible-light response iron oxide doped nitrogen-deficient carbon nitride composite material

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preparation example Construction

[0027] A visible light-responsive Fe 2 o 3 / nd-g-C 3 N 4 The preparation method of composite material, comprises the following steps:

[0028] Step 1) dicyandiamide is placed in the baking oven and dried, and after grinding, it is mixed with ferrous sulfate heptahydrate (FeSO 4 ·7H 2 O) mix and put into an alumina crucible, heat up and calcinate after being covered and semi-closed. After the calcination, it was naturally placed and cooled to room temperature to obtain Fe 2 o 3 / nd-g-C 3 N 4 crude product;

[0029] Step 2) with the Fe that step 1 obtains 2 o 3 / nd-g-C 3 N 4 The crude product was added to distilled water: ethanol 1:1 solution, ultrasonically oscillated, and after centrifugation, the precipitate was taken and washed with distilled water to obtain Fe 2 o 3 / nd-g-C 3 N 4 product;

[0030] Step 3) with the Fe that step 2 obtains 2 o 3 / nd-g-C 3 N 4 The product is dried to obtain Fe 2 o 3 / nd-g-C 3 N 4 composite material.

[0031] In step 1...

Embodiment 1

[0035] Step 1: Put 5g of dicyandiamide in an oven at 60°C for 12h, grind it with 0.1653g of FeSO 4 ·7H 2 O mixed evenly, put into an alumina crucible, and calcined at 600°C for 4h with a heating rate of 2.3°C / min. After calcination, let it cool down to room temperature naturally, and get powdered Fe after grinding. 2 o 3 / nd-g-C 3 N 4 crude product;

[0036] Step 2: the Fe obtained in step 1 2 o 3 / nd-g-C 3 N 4 The crude product was added to 200mL distilled water: ethanol 1:1 solution, ultrasonically oscillated at 100W for 6h, and then centrifuged at 10,000 rpm for 10min, the precipitate was taken and washed with distilled water to obtain Fe 2 o 3 / nd-g-C 3 N 4 product;

[0037] Step 3: the Fe obtained in step 2 2 o 3 / nd-g-C 3 N 4 The product was dried at 60°C for 12 hours to obtain Fe 2 o 3 / nd-g-C 3 N 4 Composite material, denoted as ND-001, its C 3 N 4 The molar ratio with Fe element is 1:0.01.

Embodiment 2

[0039] Step 1: Put 5g of dicyandiamide in an oven at 60°C for 12 hours, grind it with 0.3307g of FeSO 4 ·7H 2 O mixed evenly, put into an alumina crucible, and calcined at 600°C for 4h with a heating rate of 2.3°C / min. After calcination, let it cool down to room temperature naturally, and get powdered Fe after grinding. 2 o 3 / nd-g-C 3 N 4 crude product;

[0040] Step 2: the Fe obtained in step 1 2 o 3 / nd-g-C 3 N 4 The crude product was added to 200mL distilled water: ethanol 1:1 solution, ultrasonically oscillated at 100W for 6h, and then centrifuged at 10,000 rpm for 10min, the precipitate was taken and washed with distilled water to obtain Fe 2 o 3 / nd-g-C 3 N 4 product;

[0041] Step 3: the Fe obtained in step 2 2 o 3 / nd-g-C 3 N 4 The product was dried at 60°C for 12 hours to obtain Fe 2 o 3 / nd-g-C 3 N 4 Composite material, denoted as ND-002, its C 3 N 4 The molar ratio with Fe element is 1:0.02;

[0042] As a comparison, in step 1, the dried dic...

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Abstract

The invention discloses a preparation method of Fe2O3 / nd-g-C3N4 composite material and belongs to the technical field of preparation of an environment-friendly material. The preparation method comprises the following steps: 1) preparing a coarse product of Fe2O3 / nd-g-C3N4; 2) preparing a product of Fe2O3 / nd-g-C3N4; 3) preparing Fe2O3 / nd-g-C3N4 composite material. According to the preparation method of Fe2O3 / nd-g-C3N4 composite material, the composite material of Fe2O3 and nd-g-C3N4 is synthesized by calcination. The method has the advantages of simple and safe technology, cheap and easily available raw materials, no toxin or harm, convenience in batch production and compliance to environmental friendliness requirement. The invention also aims to provide application of the visible-light response Fe2O3 / nd-g-C3N4 composite material, wherein the composite material is used to degrade RhB under visible light, while excellent photocatalytic activity is shown through the degradation of RhB under visible light.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental protection materials, in particular to an Fe 2 o 3 / nd-g-C 3 N 4 Composite material (iron oxide doped nitrogen-deficient carbon nitride composite material) and its preparation method and application. Background technique [0002] In recent years, with the rapid development of the economy, energy and environmental problems around the world have become more and more serious. Due to the many limitations of traditional wastewater treatment technology, certain pretreatment procedures are often required for special wastewater to degrade macromolecular organic pollutants into low molecular organic substances, and then enter traditional steps for treatment. At present, photocatalytic technology is an emerging pollution control technology, which has the advantages of high reaction efficiency and mild reaction conditions for the degradation of macromolecular organic pollutants. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08C02F1/30C02F101/30
CPCB01J27/24B01J37/08C02F1/30C02F2305/10C02F2101/30B01J35/39
Inventor 夏世斌刘琪
Owner WUHAN UNIV OF TECH
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