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A kind of copper algae-based carbon/nano tio 2 Composite materials and their preparation and application

A technology of composite materials and copper algae-based carbon, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of difficult loading, poor adhesion performance, and expensive carrier, and achieve low cost, Ease of recycling and high catalytic activity

Active Publication Date: 2021-07-27
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Glasses as TiO 2 When the carrier is used, due to the smooth surface of the glass, the adhesion performance is poor, which makes the firm and uniform load more technically difficult
Metals as TiO 2 When the carrier is used, the carrier is more expensive and the load is more difficult (Chemosphere, 2017, 182:539-546)

Method used

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  • A kind of copper algae-based carbon/nano tio <sub>2</sub> Composite materials and their preparation and application
  • A kind of copper algae-based carbon/nano tio <sub>2</sub> Composite materials and their preparation and application
  • A kind of copper algae-based carbon/nano tio <sub>2</sub> Composite materials and their preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] According to the mass ratio of polytetrafluoroethylene / copper algae powder = 2.56:1, weigh 20.48g of polytetrafluoroethylene and 8g of copper algae powder, put them in a mortar and grind them, and mix them closely. Then the mixture was placed in a crucible and put into a vacuum tube furnace under N 2 Under the protection of the atmosphere, at 5°C·min -1 The heating rate was increased to 550°C, and the temperature was maintained for 4 hours. After the sample was cooled to room temperature, it was ground in a mortar and passed through an 80-mesh sieve to obtain a copper algae-based carbon material.

[0040]Put 10mL of tetrabutyl titanate dropwise into the Erlenmeyer flask containing 30mL of ethanol, and then stir it with a magnetic stirrer to make it fully mixed to form A liquid; pipette 10mL of ethanol, 1mL Add distilled water and 1mL acetic acid into the pear-shaped funnel in turn, and mix well to form B solution. Under a stirring environment, slowly drop liquid B in...

Embodiment 2

[0044] According to the mass ratio of polytetrafluoroethylene / copper algae powder = 2.56:1, weigh 20.48g of polytetrafluoroethylene and 8g of copper algae powder, put them in a mortar and grind them, and mix them closely. Then the mixture was placed in a crucible and put into a vacuum tube furnace under N 2 Under the protection of the atmosphere, at 5°C·min -1 The heating rate was increased to 650°C, and the temperature was maintained for 4 hours. After the sample was cooled to room temperature, it was ground in a mortar and passed through an 80-mesh sieve to obtain a copper algae-based carbon material.

[0045] Prepare copper algae-based carbon / nano-TiO according to the method of Example 1 2 Composite material, denoted as TiO 2 / AC(650). The conditions for evaluating the photocatalytic performance of the composite material are the same as in Example 1, and the results are shown in Table 1.

Embodiment 3

[0047] According to the mass ratio of polytetrafluoroethylene / copper algae powder = 2.56:1, weigh 20.48g of polytetrafluoroethylene and 8g of copper algae powder, put them in a mortar and grind them, and mix them closely. Then the mixture was placed in a crucible and put into a vacuum tube furnace under N 2 Under the protection of the atmosphere, at 5°C·min -1 The heating rate was increased to 700°C, and the temperature was maintained for 4 hours. After the sample was cooled to room temperature, it was ground in a mortar and passed through an 80-mesh sieve to obtain a copper algae-based carbon material.

[0048] Prepare copper algae-based carbon / nano-TiO according to the method of Example 1 2 Composite material, denoted as TiO 2 / AC(700). The conditions for evaluating the photocatalytic performance of the composite material are the same as in Example 1, and the results are shown in Table 1.

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Abstract

The invention discloses a copper algae-based carbon / nano-TiO 2 Composite materials and their preparation methods and applications. The copper algae-based carbon / nano-TiO 2 The composite material is based on copper algae carbon as the carrier, nano-TiO 2 As an active component, it is loaded on copper algae-based carbon; the copper algae-based carbon is prepared by the following method: according to the mass ratio of polytetrafluoroethylene: copper algae powder is 1 to 3:1, weigh a certain amount of polytetrafluoroethylene Vinyl fluoride and copper algae powder, after fully grinding and mixing, put into vacuum tube furnace, under N 2 Under the protection of the atmosphere, the temperature was raised to 550-1000°C for carbonization. After the carbonization was completed, the sample was cooled to room temperature, ground in a mortar, and passed through a 60‑80 mesh sieve to obtain a copper algae-based carbon material. The invention provides the copper algae-based carbon / nano-TiO 2 Application of composite materials as catalysts in the degradation of naphthalene under visible light. Copper algae-based charcoal / nano-TiO provided by the invention 2 The composite material exhibits high catalytic activity in the degradation of PAHs under visible light, and its preparation method has the characteristics of low cost, simple operation, and environmental protection.

Description

[0001] (1) Technical field [0002] The invention relates to a copper algae-based carbon / nano-TiO 2 Composite material and its preparation method and its application in adsorption degradation of a typical PAHs-naphthalene pollution. [0003] (2) Background technology [0004] TiO 2 It is a wide bandgap semiconductor material often used as a photocatalyst. It is usually divided into three crystal forms: anatase, rutile and brookite. Compared with the other two crystal forms, anatase has a lower band gap, so it is usually used as a photocatalytic degradation material. For now, the use of visible light to activate TiO 2 To govern the environment is an ideal and feasible environmental treatment technology and engineering (Environmental Science & Pollution Research International, 2015, 22(20): 15432-15442). Due to nano TiO 2 It has very good characteristics, such as chemical stability, non-toxic and harmless to the human body and the environment, low heavy metal content, stron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J21/18B01J37/08A62D3/17A62D101/20
CPCB01J21/063B01J21/18B01J37/084A62D3/17A62D2101/20B01J35/393
Inventor 曾淦宁游翰章杜明明洪春仙丁一梅王开珍徐培杰徐乐董嘉静艾宁刘博陈冰
Owner ZHEJIANG UNIV OF TECH