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Quaternary efficient photocatalytic nano material with memory effect, preparation method thereof and air purifier

A nanomaterial, photocatalytic technology, applied in chemical instruments and methods, botanical equipment and methods, separation methods, etc., can solve the problem of photocatalysts losing catalytic activity and other problems, achieve excellent antibacterial properties, improve catalytic activity, and have a wide range of applications Effect

Pending Publication Date: 2021-08-24
深圳市康弘智能健康科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to propose a quaternary high-efficiency photocatalytic nanomaterial with a "memory" effect and its preparation method, as well as an air purifier, aiming to solve the problem of photocatalysts losing catalytic activity in dark environments

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  • Quaternary efficient photocatalytic nano material with memory effect, preparation method thereof and air purifier
  • Quaternary efficient photocatalytic nano material with memory effect, preparation method thereof and air purifier
  • Quaternary efficient photocatalytic nano material with memory effect, preparation method thereof and air purifier

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preparation example Construction

[0047] The present invention further proposes a method for preparing a quaternary high-efficiency photocatalytic nanomaterial with a "memory" effect as described above, please refer to figure 1 , the preparation method of the quaternary high-efficiency photocatalytic nanomaterial with "memory" effect proposed by the present invention comprises the following steps:

[0048] S10, the Cu(NO 3 ) 2 ·3H 2 O is dissolved in a mixed solvent of glycerol, ethanol and water, and urea is added to react under closed heating conditions to obtain a mixed solution.

[0049] In this step, Cu-Cu is mainly prepared 2 O binary material, Cu-Cu 2 Cu and Cu in O binary materials 2 O is fused together to form a substance similar to an alloy. Under the condition of airtight heating, urea is used as a reducing agent to reduce divalent copper to monovalent copper and elemental copper. The reaction can be carried out in an autoclave, for example, will contain Cu(NO 3 ) 2 ·3H 2 A solution of O, g...

Embodiment 1

[0080] (1) 5mmol of Cu(NO 3 ) 2 ·3H 2 O was dissolved in 30mL of a mixed solvent of glycerol, ethanol and water (volume ratio of glycerol, ethanol and water, 7:7:10), and 9mmol urea was added to form a mixture containing Cu(NO 3 ) 2 ·3H 2 O, the solution of glycerol, ethanol, water, and urea were added in a stainless steel autoclave lined with polytetrafluoroethylene, and then the autoclave was placed in an oven at 180° C. for 10 h to obtain a mixed solution;

[0081] (2) Separating the mixed liquid from solid to liquid to obtain a solid, washing the solid, and vacuum drying at 65°C for 12 hours to obtain the first intermediate;

[0082] (3) The first intermediate is placed in an ethanol solution, ultrasonicated for 5 minutes to form a dispersion, and K is added to the dispersion. 2 SnO 3 ·3H 2 Aqueous solution of O (wherein K 2 SnO 3 ·3H 2 The amount of substance of O is 0.03mmol), and after stirring for 10min, a suspension is obtained;

[0083] (4) Add ethyl aceta...

Embodiment 2

[0088] (1) 5mmol of Cu(NO 3 ) 2 ·3H 2 O was dissolved in 30mL of a mixed solvent of glycerol, ethanol and water (volume ratio of glycerol, ethanol and water, 7:7:10), and 9mmol urea was added to form a mixture containing Cu(NO 3 ) 2 ·3H 2 O, the solution of glycerol, ethanol, water, and urea were added in a stainless steel autoclave lined with polytetrafluoroethylene, and then the autoclave was placed in an oven at 180° C. for 10 h to obtain a mixed solution;

[0089] (2) Separating the mixed liquid from solid to liquid to obtain a solid, washing the solid, and vacuum drying at 65°C for 12 hours to obtain the first intermediate;

[0090] (3) The first intermediate is placed in an ethanol solution, ultrasonicated for 5 minutes to form a dispersion, and K is added to the dispersion. 2 SnO 3 ·3H 2 Aqueous solution of O (wherein K 2 SnO 3 ·3H 2 The amount of substance of O is 0.06mmol), and after stirring for 10min, a suspension is obtained;

[0091] (4) Add ethyl aceta...

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Abstract

The invention discloses a quaternary efficient photocatalytic nanomaterial with a memory effect, a preparation method thereof and an air purifier, and relates to the technical field of catalysts. The quaternary efficient photocatalytic nanomaterial with the memory effect comprises a Cu-Cu2O-SnO2-Ag quaternary composite material, Sn in SnO2 can be used as a decorative component in a composite photocatalyst system to capture photo-induced electrons injected from a light absorption agent component and release the photo-induced electrons in the dark through reaction with O2 to generate active H2O2, thus the illumination photocatalytic memory effect is achieved, the four components have the synergistic effect, the four-element efficient photocatalytic nano-material with the memory effect has catalytic activity in a dark environment, the catalytic activity is maintained for 10 h or above, the catalytic activity of the photocatalytic material is obviously improved, and the antibacterial property is improved.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a quaternary high-efficiency photocatalytic nanomaterial with a "memory" effect, a preparation method thereof, and an air purifier. Background technique [0002] Over the past decades, semiconductor-based photocatalysts have been widely used in solar energy conversion and environmental applications. It is widely recognized that photocatalysts can generate various reactive oxygen species (ROSs) in situ under appropriate light exposure to disinfect microorganisms and degrade organic pollutants at ambient temperature and pressure. [0003] Most of the existing photocatalysts function only under light, because their ROS generation relies on continuous light to generate electron-hole pairs. However, many potential applications require prolonged continuous activity in the dark, limiting the application of photocatalysts. Contents of the invention [0004] The main purpose of the ...

Claims

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Application Information

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IPC IPC(8): B01J23/89A01N59/16A01N59/20A01P1/00B01D53/86B01D53/72C02F1/30A61L9/18C02F101/34C02F101/38
CPCB01J23/8966A01N59/16A01N59/20B01D53/8687B01D53/8668C02F1/30A61L9/18C02F2101/308C02F2101/34C02F2101/38C02F2101/40C02F2305/10B01D2257/708A61L2209/21B01J35/39B01J35/23
Inventor 陈耀刚韩贺邹治学李燕勤李丹丹
Owner 深圳市康弘智能健康科技股份有限公司