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Double-functional Beta-FeOOH/eg-C3N4 composite nanomaterial and preparation method and application thereof

A composite nanomaterial, eg-c3n4 technology, applied in hydrogen/syngas production, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of acid consumption, iron leaching, small specific surface area, etc., and achieve simple and easy operation. performance, mild reaction conditions, and low cost

Inactive Publication Date: 2019-02-12
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of β-FeOOH for the degradation of environmental pollutants has the following main disadvantages: (1) in the range of pH 2.5-3.5, it needs to consume a large amount of acid, and iron leaching is serious in acidic water environment; (2) organic complex factors Lower Fenton Activities Low Prices
Graphite carbon nitride (g-C 3 N 4 ) is widely used in the fields of photocatalytic water splitting for hydrogen production and photocatalytic degradation of pollutants due to its cheap and easy-to-obtain advantages. A further boost, therefore, would be g-C 3 N 4 Combining with β-FeOOH is one of the effective strategies to improve its stability and photocatalytic activity
[0003] At present, FeSO is usually used in the preparation of β-FeOOH 4 As raw material, add NaOH or Na 2 CO 3 Or urea and other precipitants are prepared under alkaline conditions, the steps are more complicated and tedious, and no β-FeOOH and g-C 3 N 4 Composite preparation method

Method used

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  • Double-functional Beta-FeOOH/eg-C3N4 composite nanomaterial and preparation method and application thereof
  • Double-functional Beta-FeOOH/eg-C3N4 composite nanomaterial and preparation method and application thereof
  • Double-functional Beta-FeOOH/eg-C3N4 composite nanomaterial and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1)eg-C 3 N 4 preparation of

[0024] Take 18g of melamine in a crucible, place it in a muffle furnace, heat it up to 550°C at a heating rate of 5°C / min, and calcinate for 4 hours to obtain yellow Bulk g-C 3 N 4 . Take 6g g-C 3 N 4 In a crucible, add an appropriate amount of water to sonicate for 1 hour, then dry in an oven at 120°C for 2 hours, then place it in a muffle furnace and heat it to 550°C, continue to calcine for 4 hours, and obtain eg-C after cooling 3 N 4 .

[0025] (2)β-FeOOH / eg-C 3 N 4 preparation of

[0026] Take 100mg of eg-C 3 N 4 Put the powder into a 100ml beaker, then add 50ml of deionized water, and then adjust the pH to 2 with 6mol / L hydrochloric acid. Then add 142mg of FeCl 3 ·6H 2 After O, it was sonicated for 6 hours, centrifuged, and the product was washed three times with ethanol and pure water, respectively, and dried in an oven at 60°C for 12 hours.

[0027] The morphology, structure and composition of the product were chara...

Embodiment 2

[0030] (1)eg-C 3 N 4 preparation of

[0031] Take 6g of melamine in a crucible, place it in a muffle furnace, heat it up to 550°C at a heating rate of 5°C / min, and calcinate for 4 hours to obtain yellow eg-C 3 N 4 . Take 3g-C 3 N 4 In a crucible, add an appropriate amount of water for ultrasonication for 1 hour, then dry in an oven at 120°C for 2 hours, then place it in a muffle furnace and heat it to 550°C, continue calcination for 5 hours, and obtain eg-C after cooling 3 N 4 .

[0032] (2)β-FeOOH / eg-C 3 N 4 preparation of

[0033] Take 50mg eg-C 3 N 4 Put the powder into a 100ml beaker, add 50ml of deionized water, then use 6mol / L hydrochloric acid to adjust the pH of the solution to 1, after ultrasonication for 1h, add 94mg of FeCl 3 ·6H 2 O, continue to sonicate for 4 hours, centrifuge, wash the product with ethanol and pure water three times, and put it in a 60°C oven to dry for 12 hours.

Embodiment 3

[0035] (1)eg-C 3 N 4 preparation of

[0036] Take 9g of melamine in a crucible, place it in a muffle furnace, heat it up to 550°C at a rate of 5°C / min, and calcinate for 4 hours to obtain yellow Bulk g-C 3 N 4 . Take 3g-C 3 N 4 In a crucible, add an appropriate amount of water to sonicate for 1 hour, then dry in an oven at 120°C for 2 hours, then place it in a muffle furnace and heat it to 550°C, continue to calcine for 4 hours, and obtain eg-C after cooling 3 N 4 .

[0037] (2)β-FeOOH / eg-C 3 N 4 preparation of

[0038] Take 200mg of eg-C 3 N 4 Put the powder into a 100ml beaker, add 100ml of deionized water, and then adjust the pH of the solution to 0.5 with 6mol / L hydrochloric acid. After ultrasonication for 1h, add 378mg of FeCl 3 ·6H 2 O, ultrasonication for 6 hours, centrifugation, the product was washed three times with ethanol and pure water, and dried in an oven at 60°C for 12 hours.

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Abstract

The invention relates to a preparation method for a double-functional Beta-FeOOH / eg-C3N4 composite nanomaterial. The method comprises the following steps: using water as a solvent, adding a suitable amount of eg-C3N4, adjusting a solution pH, and adding a suitable amount of ferric salt, performing ultrasonic-processing, washing, and drying, to obtain the Beta-FeOOH / eg-C3N4 composite nanomaterial.The advantage of the method is that operation is simple and easy, a reaction condition is moderate, other chemical reagents and solvents except a raw material are prevented from being used in a wholeprocess, no by-product is generated, synchronization of combination and nano-crystalline growth is realized, cost is low, and the process environmentally friendly, and a requirement for industrializedapplication can be satisfied. A Beta-FeOOH / eg-C3N4 nano rod-like compound catalyst prepared by the method disclosed by the invention has performance of photocatalytic-degrading a pollutant in visiblelight, and capacity of generating hydrogen by electrocatalytically decomposing water.

Description

technical field [0001] The present invention relates to a bifunctional β-FeOOH / eg-C 3 N 4 The invention relates to a method for preparing composite nanomaterials, which belongs to the technical field of green preparation of inorganic / organic composite nanomaterials. Background technique [0002] Nanoscale iron oxide has become a research hotspot in the international water treatment agent due to its super adsorption capacity, excellent flow stability and low price. Among them, the needle-shaped β-FeOOH is a kind of adsorption The semiconductor material that catalyzes in one body, the layers in the crystal structure are combined by hydrogen bonds, and due to the unique self-organization phenomenon of nanomaterials, it has not only been widely used in environmental protection, catalysts, biomedicine, etc., but also It is a class of nanostructure materials with great development prospects. However, the use of β-FeOOH for the degradation of environmental pollutants has the fol...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCC01B3/042C02F1/30B01J27/24C01B2203/0277C01B2203/1041C02F2101/36C02F2101/34C02F2101/38C02F2101/308C02F2305/10B01J35/33B01J35/39Y02E60/36
Inventor 邹菁方俊雄江吉周曹媛毛冬鹏邓文明何小苗
Owner WUHAN INSTITUTE OF TECHNOLOGY
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