CN112136830A - Photocatalyst sterilization disinfectant based on Ag and N co-doped titanium dioxide/silver nitrate and preparation method and application thereof - Google Patents
Photocatalyst sterilization disinfectant based on Ag and N co-doped titanium dioxide/silver nitrate and preparation method and application thereof Download PDFInfo
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- CN112136830A CN112136830A CN202010965999.9A CN202010965999A CN112136830A CN 112136830 A CN112136830 A CN 112136830A CN 202010965999 A CN202010965999 A CN 202010965999A CN 112136830 A CN112136830 A CN 112136830A
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- titanium dioxide
- silver nitrate
- preparation
- photocatalyst
- disinfectant
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 84
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 42
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 37
- 239000000645 desinfectant Substances 0.000 title claims abstract description 35
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 31
- 229910001961 silver nitrate Inorganic materials 0.000 title claims abstract description 31
- 230000001954 sterilising effect Effects 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 19
- 239000011858 nanopowder Substances 0.000 claims abstract description 16
- 239000002270 dispersing agent Substances 0.000 claims abstract description 8
- 239000000341 volatile oil Substances 0.000 claims abstract description 8
- 241000588724 Escherichia coli Species 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 5
- 241000712461 unidentified influenza virus Species 0.000 claims abstract description 5
- 239000008367 deionised water Substances 0.000 claims abstract description 4
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 241000007181 unidentified human coronavirus Species 0.000 claims abstract 2
- 239000000203 mixture Substances 0.000 claims description 15
- 238000005245 sintering Methods 0.000 claims description 6
- 239000007790 solid phase Substances 0.000 claims description 6
- 241000191940 Staphylococcus Species 0.000 claims description 4
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000000969 carrier Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract description 2
- 238000001228 spectrum Methods 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 230000000249 desinfective effect Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000003206 sterilizing agent Substances 0.000 abstract 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 244000309467 Human Coronavirus Species 0.000 description 2
- 241000712431 Influenza A virus Species 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 2
- 230000002070 germicidal effect Effects 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 230000002458 infectious effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 206010008479 Chest Pain Diseases 0.000 description 1
- 241000711573 Coronaviridae Species 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- 206010012735 Diarrhoea Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 206010028813 Nausea Diseases 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008693 nausea Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005180 public health Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B01J35/23—
-
- B01J35/39—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
- B01J37/088—Decomposition of a metal salt
Abstract
The invention provides a method for sterilizing and disinfecting by utilizing Ag and N co-doped titanium dioxide/silver nitrate photocatalyst, which comprises the steps of mixing solid silver nitrate powder and P25 titanium dioxide nano powder, uniformly grinding, calcining to prepare Ag and N co-doped titanium dioxide, dissolving the co-doped titanium dioxide, silver nitrate, a dispersing agent and plant essential oil in deionized water, and completely dispersing by ultrasonic to obtain the photocatalyst sterilizing and disinfecting agent. The invention widens the spectrum absorption range of titanium dioxide to a visible light region through Ag and N codoping, improves the utilization efficiency of sunlight and the concentration of photo-generated carriers, has the characteristics of simple preparation method, low cost, good sterilization and disinfection effects and the like, and can effectively kill human coronavirus, influenza virus, escherichia coli and the like.
Description
Technical Field
The invention belongs to the technical field of new materials, and particularly relates to a photocatalyst sterilization disinfectant based on Ag and N co-doped titanium dioxide/silver nitrate as well as a preparation method and application thereof.
Background
Infectious germs such as coronavirus, influenza virus, escherichia coli, staphylococcus and the like can be quickly infected through droplets, breath, contact and other channels, which become great hazards to human health and life safety, and the prevention, monitoring and treatment of the infectious germs are important contents for guaranteeing public health safety. The main component of the 84 disinfectant which is usually adopted is sodium hypochlorite, which has strong oxidizing property and corrosiveness and has pungent smell, and the excessive inhalation of a human body can cause dyspnea, cough, nausea, chest pain, diarrhea and the like, and even death of serious people; the ethanol volatilized from the alcohol disinfectant also has potential safety hazard and even explosion. Therefore, the development of a sterilizing disinfectant with high killing efficiency, no toxicity, no odor and safety is very important.
Due to the wide band gap (3.2eV), intrinsic titanium dioxide can only absorb ultraviolet light with the wavelength efficiency of 380nm, but cannot absorb and utilize visible light with wider spectrum, so that the sterilization and disinfection performance of the photocatalyst sterilization and disinfection agent in indoor places is poor. Therefore, the broadening of the spectral response range of the titanium dioxide photocatalyst has important theoretical significance and practical value.
Disclosure of Invention
The invention aims to provide a photocatalyst disinfectant based on Ag and N co-doped titanium dioxide/silver nitrate and a preparation method and application thereof.
In order to realize the purpose of the invention, the invention adopts the following technical scheme to realize:
the invention provides a preparation method of a photocatalyst sterilization disinfectant based on Ag and N codoped titanium dioxide/silver nitrate, which is characterized by comprising the following steps: the method comprises the following steps:
(1) weighing anhydrous silver nitrate and titanium dioxide nano powder and mixing to obtain a mixture;
(2) grinding the mixture;
(3) solid-phase sintering the ground mixture in the step (2) to prepare Ag and N co-doped titanium dioxide nano powder;
(4) and (4) dissolving the Ag and N co-doped titanium dioxide nano powder in the step (3), silver nitrate, a dispersing agent and plant essential oil into deionized water, and performing ultrasonic dispersion to obtain the photocatalyst sterilizing disinfectant.
Further, the mass ratio of the anhydrous silver nitrate in the mixture is 0.1% -1%.
Further, the titanium dioxide nano powder is P25 titanium dioxide nano powder.
Further, the temperature of the solid phase sintering in the step (3) is 200-450 ℃, and the time is 30-40 minutes.
Further, the concentration of silver nitrate in the photocatalyst disinfectant in the step (4) is 0.5-2 mol/L.
Further, the concentration of Ag and N co-doped titanium dioxide of the photocatalyst sterilizing disinfectant in the step (4) is 0.01 g/L-0.1 g/L.
Furthermore, the concentration of the dispersant of the photocatalyst sterilization disinfectant in the step (4) is 0.1-0.5 mol/L, and the concentration of the plant essential oil is 0.1-1 g/L.
The invention also provides the photocatalyst sterilization disinfectant prepared by the preparation method.
Furthermore, the photocatalyst sterilization disinfectant can kill human coronavirus, influenza virus, escherichia coli and staphylococcus within 5 minutes under the irradiation of standard sunlight, and the killing rate reaches 100%.
The invention also provides the application of the photocatalyst sterilization disinfectant in sterilization and disinfection of homes, clothes, vehicles, packages and public places.
Further, the concentrations of Ag and N co-doped titanium dioxide nano powder, silver nitrate, a dispersing agent and plant essential oil in the photocatalyst sterilizing disinfectant are respectively 0.05g/L, 1mol/L, 0.2mol/L and 0.5g/L,
further, the mixture ground in the step (2) is ultrafine powder.
Compared with the prior art, the invention has the advantages and the technical effects that:
1. the invention fully utilizes the doping characteristics of Ag and N elements and realizes the preparation of Ag and N co-doped titanium dioxide by a solid-phase sintering method. The spectral response wavelength is broadened by reducing the band gap of the titanium dioxide. Due to the increase of the concentration of the photogenerated carriers and the concentration of the active free radicals, the killing efficiency of Ag and N codoped titanium dioxide/silver nitrate is obviously improved, and the killing rate in 5 minutes reaches 100%.
2. The Ag and N element doping adopted by the invention not only has the functions of adjusting the lattice structure and reducing the optical band gap of titanium dioxide, but also can improve the transmission path of a photon-generated carrier, and the service life of the carrier is prolonged by more than 1.5 times, and is vital to reducing the recombination reaction of electrons in a photocatalyst and improving the concentration of active free radicals.
Drawings
FIG. 1 is a graph of influenza A virus cells at different illumination times, with and without the use of a photocatalyst germicidal sterilant.
FIG. 2 illustrates the virus killing rate of the photo-catalytic germicidal sterilant based on the titer of influenza A virus.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the following embodiments.
Example 1
The preparation method of the photocatalyst sterilization disinfectant based on Ag and N co-doped titanium dioxide/silver nitrate comprises the following steps:
1. weighing anhydrous silver nitrate and P25 titanium dioxide nano powder and mixing to obtain a mixture, wherein the mass ratio of the silver nitrate in the mixture is 0.5%;
2. grinding the mixture for 30 minutes to uniformly mix the mixture;
3. solid-phase sintering the mixture ground in the step 2 at 300 ℃ for 30 minutes to prepare Ag and N co-doped titanium dioxide nano powder;
4. and (3) dissolving the Ag and N co-doped titanium dioxide nano powder in the step (3), silver nitrate, a dispersing agent and plant essential oil into deionized water to enable the concentrations of the Ag and N co-doped titanium dioxide nano powder, the silver nitrate, the dispersing agent and the plant essential oil to be 0.05g/L, 1mol/L, 0.2mol/L and 0.5g/L respectively, and performing ultrasonic dispersion for 10 minutes to obtain the photocatalyst sterilizing disinfectant.
By the above method, standard sunlight (100 mW/cm) is obtained2AM1.5) can kill human coronavirus, influenza virus, escherichia coli and staphylococcus within 5 minutes, and the killing rate reaches 100 percent. The photocatalyst sterilization disinfectant based on Ag and N co-doped titanium dioxide/silver nitrate can be applied to sterilization in areas such as home, clothes, vehicles, packages, public places and the like.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. The preparation method of the photocatalyst sterilization disinfectant based on Ag and N codoped titanium dioxide/silver nitrate is characterized by comprising the following steps: the method comprises the following steps:
(1) weighing anhydrous silver nitrate and titanium dioxide nano powder and mixing to obtain a mixture;
(2) grinding the mixture;
(3) solid-phase sintering the ground mixture in the step (2) to prepare Ag and N co-doped titanium dioxide nano powder;
(4) and (4) dissolving the Ag and N co-doped titanium dioxide nano powder in the step (3), silver nitrate, a dispersing agent and plant essential oil into deionized water, and performing ultrasonic dispersion to obtain the photocatalyst sterilizing disinfectant.
2. The preparation method of the Ag and N co-doped titanium dioxide/silver nitrate-based photocatalyst disinfectant as claimed in claim 1, wherein the preparation method comprises the following steps: the mass ratio of the anhydrous silver nitrate in the mixture is 0.1-1%.
3. The preparation method of the Ag and N co-doped titanium dioxide/silver nitrate-based photocatalyst disinfectant as claimed in claim 1, wherein the preparation method comprises the following steps: the titanium dioxide nano powder is P25 titanium dioxide nano powder.
4. The preparation method of the Ag and N co-doped titanium dioxide/silver nitrate-based photocatalyst disinfectant as claimed in claim 1, wherein the preparation method comprises the following steps: the temperature of the solid phase sintering in the step (3) is 200-450 ℃, and the time is 30-40 minutes.
5. The preparation method of the Ag and N co-doped titanium dioxide/silver nitrate-based photocatalyst disinfectant as claimed in claim 1, wherein the preparation method comprises the following steps: the concentration of silver nitrate in the photocatalyst sterilization disinfectant in the step (4) is 0.5-2 mol/L.
6. The preparation method of the Ag and N co-doped titanium dioxide/silver nitrate-based photocatalyst disinfectant as claimed in claim 1, wherein the preparation method comprises the following steps: the concentration of Ag and N co-doped titanium dioxide of the photocatalyst sterilizing disinfectant in the step (4) is 0.01 g/L-0.1 g/L.
7. The preparation method of the Ag and N co-doped titanium dioxide/silver nitrate-based photocatalyst disinfectant as claimed in claim 1, wherein the preparation method comprises the following steps: the concentration of the dispersant of the photocatalyst sterilization disinfectant in the step (4) is 0.1-0.5 mol/L, and the concentration of the plant essential oil is 0.1-1 g/L.
8. The photocatalyst disinfectant prepared by the preparation method of any one of claims 1 to 7.
9. The photocatalyst disinfectant as set forth in claim 8, wherein: the photocatalyst sterilizing disinfectant can kill human coronavirus, influenza virus, escherichia coli and staphylococcus in 5 minutes under the irradiation of standard sunlight, and the killing rate reaches 100%.
10. The photocatalyst disinfectant of claim 9, which is used for disinfection of home, clothing, transportation means, package and public places.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010965999.9A CN112136830A (en) | 2020-09-15 | 2020-09-15 | Photocatalyst sterilization disinfectant based on Ag and N co-doped titanium dioxide/silver nitrate and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010965999.9A CN112136830A (en) | 2020-09-15 | 2020-09-15 | Photocatalyst sterilization disinfectant based on Ag and N co-doped titanium dioxide/silver nitrate and preparation method and application thereof |
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| CN112136830A true CN112136830A (en) | 2020-12-29 |
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| CN202010965999.9A Pending CN112136830A (en) | 2020-09-15 | 2020-09-15 | Photocatalyst sterilization disinfectant based on Ag and N co-doped titanium dioxide/silver nitrate and preparation method and application thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1692735A (en) * | 2005-05-20 | 2005-11-09 | 东北大学 | Antibiosis material of low cost, and its prepn. method |
| CN103977830A (en) * | 2014-05-21 | 2014-08-13 | 江苏科技大学 | Preparation method of doped nano-titanium dioxide with visible-light activity and preparation method of polishing emulsion of visible light photocatalytic photocatalyst |
| CN105233667A (en) * | 2015-10-07 | 2016-01-13 | 天津艾希科技有限公司 | Negative ion air purifying agent |
| CN108275719A (en) * | 2018-01-30 | 2018-07-13 | 北京工业大学 | A kind of TiO that Phase Proportion is controllable2The preparation and application of heterojunction material |
| CN111054208A (en) * | 2018-10-17 | 2020-04-24 | 上海象鼋环保科技有限公司 | Air purifying agent and preparation method thereof |
-
2020
- 2020-09-15 CN CN202010965999.9A patent/CN112136830A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1692735A (en) * | 2005-05-20 | 2005-11-09 | 东北大学 | Antibiosis material of low cost, and its prepn. method |
| CN103977830A (en) * | 2014-05-21 | 2014-08-13 | 江苏科技大学 | Preparation method of doped nano-titanium dioxide with visible-light activity and preparation method of polishing emulsion of visible light photocatalytic photocatalyst |
| CN105233667A (en) * | 2015-10-07 | 2016-01-13 | 天津艾希科技有限公司 | Negative ion air purifying agent |
| CN108275719A (en) * | 2018-01-30 | 2018-07-13 | 北京工业大学 | A kind of TiO that Phase Proportion is controllable2The preparation and application of heterojunction material |
| CN111054208A (en) * | 2018-10-17 | 2020-04-24 | 上海象鼋环保科技有限公司 | Air purifying agent and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| GUOGUANG LIU 等: ""The preparation of Zn2+-doped TiO2 nanoparticles by sol–gel and solid phase reaction methods respectively and their photocatalytic activities"", 《CHEMOSPHERE》 * |
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Application publication date: 20201229 |