Tellurium catalyst and application thereof in photo-thermal catalytic air disinfection

A catalyst and hydrothermal reaction technology, applied in the field of air purification, can solve the problems of poor catalytic activity and stability, and achieve the effects of excellent light absorption capacity, good stability, and high catalytic activity

Pending Publication Date: 2022-05-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings and shortcomings of the existing photothermal sterilization tellurium catalysts of poor catalytic activity and stability, to provide a tellurium catalyst, which is prepared by carbon doping in a specific process, so that it exposes high-energy cry

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  • Tellurium catalyst and application thereof in photo-thermal catalytic air disinfection
  • Tellurium catalyst and application thereof in photo-thermal catalytic air disinfection
  • Tellurium catalyst and application thereof in photo-thermal catalytic air disinfection

Examples

Experimental program
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Effect test

Embodiment 1

[0078] A kind of tellurium catalyst Te nanowire material Te-8h, concrete preparation method is as follows:

[0079] (1): 160mg sodium tellurite Na 2 TeO 3 Dissolve 1g of polyvinylpyrrolidone (PVP) with a relative molecular weight of 40,000 in 100ml of deionized water, and add 7mL of ammonia water to the mixed solution under magnetic stirring and stir evenly, then add 3mL of hydrazine hydrate solution as a reducing agent , and continued to stir for 1h.

[0080] (2): After the stirring is completed, the mixed solution is transferred to a hydrothermal reaction kettle with a polytetrafluoroethylene lining, and a hydrothermal synthesis reaction occurs in an oven. The hydrothermal temperature is 200 ° C, and the hydrothermal time is 8 hours. When finished, let it cool down to room temperature slowly.

[0081] (3): Then the reaction product is vacuum filtered, and washed repeatedly with pure water until the pH of the cleaning solution is neutral, put it into a vacuum drying oven, ...

Embodiment 2

[0084] A kind of tellurium catalyst Te nanowire material Te-12h, concrete preparation method is as follows:

[0085] (1): 160mg sodium tellurite (Na 2 TeO 3 ) and 1g of polyvinylpyrrolidone (PVP) with a relative molecular weight of 40,000 were dissolved in 100ml of deionized water, and 7mL of ammonia water was first added to the mixed solution under magnetic stirring, and after stirring evenly, 3ml of hydrazine hydrate solution was added as a reduction agent, and kept stirring for 1 h.

[0086] (2): After the stirring is completed, the mixed solution is transferred to a hydrothermal reaction kettle lined with polytetrafluoroethylene, and a hydrothermal synthesis reaction occurs in an oven. The hydrothermal temperature is 200°C, and the hydrothermal time is 12h. When finished, let it cool down to room temperature slowly.

[0087] (3): Then vacuum filter the reaction product, and repeatedly rinse with pure water until the pH of the cleaning solution is neutral, put it into a ...

Embodiment 3

[0090] A tellurium catalyst Te nanowire material Te-16h, the specific preparation method is as follows:

[0091] (1): 160mg sodium tellurite (Na 2 TeO 3 ) and 1g of polyvinylpyrrolidone (PVP) with a relative molecular weight of 40,000 were dissolved in 100ml of deionized water, and 7mL of ammonia water was first added to the mixed solution under magnetic stirring, and after stirring evenly, 3mL of hydrazine hydrate solution was added as a reduction agent, and kept stirring for 1 h.

[0092] (2): After the stirring is completed, the mixed solution is transferred to a hydrothermal reaction kettle with a polytetrafluoroethylene lining, and a hydrothermal synthesis reaction occurs in an oven. The hydrothermal temperature is 200 ° C, and the hydrothermal time is 16 hours. When finished, let it cool down to room temperature slowly.

[0093] (3): Then vacuum filter the reaction product, and repeatedly rinse with pure water until the pH of the cleaning solution is neutral, put it i...

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Abstract

The invention discloses a tellurium catalyst and application thereof in photo-thermal catalytic air disinfection, and belongs to the technical field of air purification. The tellurium catalyst is a carbon-doped tellurium catalyst, and the exposed crystal face of the tellurium catalyst is a 100 crystal face. The tellurium catalyst comprises tellurium/pollen carbon Te/TRP, tellurium/carbon nitride Te/CN3 or Te nanowire materials, takes a high-energy crystal face 100 as a main crystal face, has relatively high catalytic activity and relatively good stability, can show excellent sterilization performance under the driving of near-infrared light, has the sterilization rate of 99% or above, does not generate disinfection byproducts, and is suitable for industrial production. And the material has excellent light absorption capability, and can realize high-efficiency sterilization and disinfection under the condition of near-infrared light irradiation.

Description

technical field [0001] The invention relates to the technical field of air purification, in particular to a tellurium catalyst and its application in photothermal catalysis air disinfection. Background technique [0002] Bioaerosols are microbial cells in the air that contain debris and particulate matter of biological origin. These small particles can cause infectious diseases, acute toxic reactions and allergies, thereby affecting human health. Due to the recent epidemic of severe acute respiratory diseases, the prevention and control measures of bioaerosols have attracted worldwide attention. Current strategies to prevent the spread of airborne pathogens include dilution ventilation, pressurization, directed airflow, disinfection, and filtration. However, dilution ventilation, pressurized and directed airflow, and filtration will not remove and destroy airborne infectious pathogens. However, during the operation of the filtration system, pollutants will accumulate, and...

Claims

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Application Information

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IPC IPC(8): B01J27/057B01J27/24B01J35/00B01J37/08B01J37/16A61L9/18
CPCB01J27/0576B01J27/24B01J37/084B01J37/16B01J35/004A61L9/18
Inventor 夏德华关心怡唐倬云何春刘威奇麻丁仁陈琪焦奕木曹菁
Owner SUN YAT SEN UNIV
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