A kind of sic foam ceramics loaded with ferric oxide and its preparation method and application

A technology of ferroferric oxide and foam ceramics, which is applied in chemical instruments and methods, botanical equipment and methods, applications, etc., can solve the problem of degrading airborne endotoxin without microwave radiation, achieve good application prospects, and have high reflection loss , easy-to-prepare effects

Active Publication Date: 2021-11-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some researchers have used the thermal and non-thermal effects of microwaves to inactivate bioaerosols, there has been no research on combining microwave technology with microwave-absorbing fillers to improve their inactivation performance.
In addition, so far, there is no research on the degradation of airborne endotoxin by microwave radiation

Method used

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  • A kind of sic foam ceramics loaded with ferric oxide and its preparation method and application
  • A kind of sic foam ceramics loaded with ferric oxide and its preparation method and application
  • A kind of sic foam ceramics loaded with ferric oxide and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A microwave reaction device for removing bioaerosols, comprising a shell, a quartz tube 3 fixedly arranged in the shell, and quartz wool filled between the quartz tube 3 and the shell, the top of the quartz tube 3 is fixed with The infrared temperature measurement module 5 is fixed with a magnetron 6 for generating microwaves at the bottom, and a porous sieve plate 8 is arranged inside the quartz tube 3 to divide the quartz tube 3 into an upper chamber and a lower chamber. The side wall of the chamber is provided with an air inlet 1 communicating with it, the upper chamber is used for filling wave-absorbing filler and at least one air outlet 2 communicating with it is provided on the side wall, and the housing is provided with There is an observation port 7 for observing the wave-absorbing filler.

[0041] As a preferred manner, the number of the gas outlets 2 is two, which are respectively located at different heights of the quartz tube 3 .

[0042]As a preferred meth...

Embodiment 2

[0048] Weigh 100g Fe 3 o 4 The powder was added to 500mL ultrapure water and ultrasonically oscillated for 30 minutes to make Fe 3 o 4 Suspension. Three pieces of SiC foam ceramics with a diameter of 10 cm and a height of 2 cm were placed on Fe 3 o 4 Lifting and impregnation in the suspension to fully load Fe 3 o 4 Afterwards, it was dried in an oven at 120°C for 1 hour, and after cooling, it was impregnated and dried again. Put the dried material into a muffle furnace, bake it at 200°C for 30 minutes, and cool it down to room temperature naturally to obtain a microwave filler, that is, Fe 3 o 4 The SiC ceramic foam with a loading of 5.92%.

[0049] Take this product as a microwave filler, fill it in the reaction device described in embodiment 1, set the frequency as the total power of the magnetron 6 of 2.45GHz to be 700W, and adopt microwave technology to process the initial concentration as 10 6.8 Escherichia coli bioaerosol (Escherichia coli CMCC1.3373) of about ...

Embodiment 3

[0052] Weigh 200g Fe 3 o 4 The powder was added to 1L ultrapure water and ultrasonically oscillated for 30 minutes to make Fe 3 o 4 Suspension. Five pieces of SiC foam ceramics with a diameter of 10 cm and a height of 2 cm were placed on Fe 3 o 4 Lifting and impregnation in the suspension to fully load Fe 3 o 4 Afterwards, it was dried in an oven at 120°C for 1 hour, and then dipped and dried again after cooling. Put the dried material into a muffle furnace, bake it at 200°C for 30 minutes, and cool it down to room temperature naturally to obtain a microwave filler, that is, Fe 3 o 4 The SiC ceramic foam with a loading of 6.05%.

[0053] Microwave filler is packed in the quartz tube in the reaction device described in embodiment 1, and the total power of the magnetron 6 that setting frequency is 2.45GHz is 700W, adopts microwave technique to process initial concentration and is 10 6.5 CFU / m About Bacillus subtilis bioaerosol (Bacillus subtilis CMCC1.4255), under the ...

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Abstract

The invention discloses a SiC foam ceramic loaded with ferric oxide, which is prepared according to the following method: step 1, weighing Fe 3 o 4 Powder, added to ultrapure water, dispersed evenly, to prepare Fe with a concentration of 180-220g / L 3 o 4 suspension; Step 2, completely immerse SiC foam ceramics to Fe 3 o 4 In the suspension, pull up and down to load Fe 3 o 4 ; Step 3, the loaded Fe obtained in step 2 3 o 4 The SiC foam ceramics were dried at 100-130°C for 1-1.5h; step 4, after the material was cooled to room temperature, repeat steps 2 and 3; step 5, the loaded Fe obtained in step 4 3 o 4 The SiC foam ceramics were fired at 150-250°C for 20-40min, and cooled naturally to room temperature. The SiC foam ceramics loaded with ferroferric oxide can be used as a good wave-absorbing filler to inactivate biological aerosols under the condition of microwave radiation.

Description

technical field [0001] The invention relates to the technical field of air pollution control, in particular to a SiC foam ceramic (Fe 3 o 4 @SiC foam ceramics) and its preparation method and application. Background technique [0002] There are a large number of microorganisms and their secretions (biological particles) in the air, including: bacteria, viruses, chlamydia, mycoplasma, fungal spores, algae and plant cells (including pollen), insects (including mites) and their fragments and secretions The two-phase dispersion system formed by these biological particles suspended in the air and the air is called bioaerosol. The aerodynamic equivalent diameter of the bioaerosol is between 0.5-100 μm, and the equivalent diameter of the bacteria-carrying particles is generally between 4-20 μm, among which the bacteria-carrying particles with an equivalent diameter of 1-5 μm can directly invade the alveoli and cause the initial lung infection. Harmful to human health. [0003] E...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B01D39/20B01D46/00A61L9/18A01N59/16A01N59/00A01P3/00A01P1/00
CPCA01N59/00A01N59/16A61L9/18B01D39/2093B01D46/0027B01D46/0028
Inventor王灿张郅巍路思艺
OwnerTIANJIN UNIV