Efficient photocatalytic nano material with memory effect, preparation method of efficient photocatalytic nano material and air purifier

A nanomaterial and photocatalytic technology, applied in chemical instruments and methods, botanical equipment and methods, separation methods, etc., can solve the problem of losing catalytic activity

Pending Publication Date: 2021-09-14
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA +1
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Problems solved by technology

[0004] The main purpose of the present invention is to propose a high-efficiency photocatalytic nanomaterial with a "memory" effect and its preparation method, and an air purifier, aiming at solving the problem that the high-efficiency photocatalytic nanomaterial with a "memory" effect loses its catalytic activity in a dark environment The problem

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  • Efficient photocatalytic nano material with memory effect, preparation method of efficient photocatalytic nano material and air purifier
  • Efficient photocatalytic nano material with memory effect, preparation method of efficient photocatalytic nano material and air purifier
  • Efficient photocatalytic nano material with memory effect, preparation method of efficient photocatalytic nano material and air purifier

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preparation example Construction

[0044] The present invention further proposes a method for preparing a high-efficiency photocatalytic nanomaterial with a "memory" effect as described above, please refer to figure 1 , the preparation method of the high-efficiency photocatalytic nanomaterial with "memory" effect proposed by the present invention, comprises the following steps:

[0045] S10, the CuSO 4 The solution is uniformly mixed with the NaOH solution, and glucose is added at 40-65° C. to react under stirring conditions to obtain a mixed solution.

[0046] In this step, Cu is mainly prepared 2 O, the main reaction equation is as follows:

[0047] 2CuSO 4 +4NaOH+C 6 h 12 o 6 → Cu 2 O+2Na 2 SO4+C 6 h 12 o 7 +2H 2 o

[0048] Glucose, as a reducing agent, is oxidized to carboxylic acid, and copper sulfate, as an oxidant, is reduced to cuprous oxide.

[0049] In this step, the ratio of copper sulfate, sodium hydroxide and glucose is not limited by the present invention. Preferably, the CuSO 4 The...

Embodiment 1

[0080] (1) CuSO 4 solution mixed with NaOH solution, CuSO 4 The amount of the substance of NaOH is 0.02mol, the amount of the substance of NaOH is 0.03mol, and 0.04mol of glucose is added at 65°C, and the reaction is carried out for 2.5h under stirring conditions to obtain a mixed solution;

[0081] (2) Centrifuge the mixed solution to obtain a solid, wash the solid with deionized water, and then wash with ethanol, then vacuum-dry at 65° C. for 12 hours, and grind to obtain the first intermediate;

[0082] (3) Disperse the first intermediate into 20 mL of ethanol to form a dispersion liquid, add 0.04 mmol tetrabutyl titanate to the dispersion liquid, stir well to obtain a mixture, add 2 mL of ethanol aqueous solution to the mixture, and ethanol aqueous solution , the mass ratio of ethanol to water is 4, after stirring for 1.5h, react at 180°C for 10h to obtain the reaction solution;

[0083] (4) separating the solid and liquid from the reaction solution to obtain a solid, an...

Embodiment 2

[0087] (1) CuSO 4 solution mixed with NaOH solution, CuSO 4 The amount of the substance of NaOH is 0.02mol, the amount of the substance of NaOH is 0.03mol, and 0.04mol of glucose is added at 65°C, and the reaction is carried out for 2.5h under stirring conditions to obtain a mixed solution;

[0088] (2) Centrifuge the mixed solution to obtain a solid, wash the solid with deionized water, and then wash with ethanol, then vacuum-dry at 65° C. for 12 hours, and grind to obtain the first intermediate;

[0089] (3) Disperse the first intermediate into 20 mL of ethanol to form a dispersion liquid, add 0.06 mmol tetrabutyl titanate to the dispersion liquid, stir well to obtain a mixture, add 2 mL of ethanol aqueous solution to the mixture, and ethanol aqueous solution , the mass ratio of ethanol to water is 4, after stirring for 1.5h, react at 180°C for 10h to obtain the reaction solution;

[0090] (4) separating the solid and liquid from the reaction solution to obtain a solid, an...

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Abstract

The invention discloses an efficient photocatalytic nanometer material with a memory effect, a preparation method of the efficient photocatalytic nanometer material and an air purifier, and relates to the technical field of catalysts. The efficient photocatalytic nanometer material with the memory effect comprises a Cu2O-TiO2-Ag ternary composite material. In the efficient photocatalytic nanometer material with the memory effect, the Cu2O-TiO2-Ag ternary composite material realizes multiphase photocatalysis memory channels, namely, Cu2O-TiO2, Cu2O-Ag and TiO2-Ag, so that the high-efficiency photocatalytic nano material with the memory effect still has catalytic activity in a dark environment and can maintain the catalytic activity for 8 hours or above under the dark condition. The high-efficiency photocatalytic nano material with the memory effect still has catalytic activity in the dark environment, can catalyze degradation of formaldehyde, organic matters and the like, and is good in catalytic effect.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a high-efficiency photocatalytic nanomaterial with a "memory" effect, a preparation method thereof, and an air purifier. Background technique [0002] Since the 21st century, we are proud of the great progress and rapid development of the economy and society. But at the same time, what worries us is that environmental pollution has become increasingly serious. The most prominent and widespread pollution is air pollution and water pollution. Therefore, for the development of the entire biological world, human society, industry and agriculture, etc., the control and treatment of pollution has become an urgent matter. At present, the most effective solution to this problem is the photocatalytic degradation technology, which is mainly the degradation of semiconductor photocatalytic materials. hole pairs, and then with the OH adsorbed on the catalyst surface – , O 2 and so on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/00B01J35/02A01N59/20A01N59/16A01P1/00F24F8/108F24F8/167F24F8/20B01D53/86B01D53/72B01D53/44
CPCB01J23/8926B01J35/004B01J35/023A01N59/20A01N59/16B01D53/8668B01D53/8687F24F8/167F24F8/108F24F8/20B01D2259/802
Inventor 孙大陟陈耀刚韩贺李丹丹邹治学李燕勤
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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