EP3829766A1 - Verfahren zum aktivieren einer auf einem verbund abgeschiedenen photokatalytisch wirksamen deckschicht - Google Patents
Verfahren zum aktivieren einer auf einem verbund abgeschiedenen photokatalytisch wirksamen deckschichtInfo
- Publication number
- EP3829766A1 EP3829766A1 EP19748493.4A EP19748493A EP3829766A1 EP 3829766 A1 EP3829766 A1 EP 3829766A1 EP 19748493 A EP19748493 A EP 19748493A EP 3829766 A1 EP3829766 A1 EP 3829766A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radiation
- generating
- light
- photocatalytically active
- composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
- A61L9/18—Radiation
- A61L9/20—Ultraviolet radiation
- A61L9/205—Ultraviolet radiation using a photocatalyst or photosensitiser
-
- 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
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- 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
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Disinfection or sterilisation of materials or objects, in general; Accessories therefor
- A61L2/02—Disinfection or sterilisation of materials or objects, in general; Accessories therefor using physical processes
- A61L2/08—Radiation
- A61L2/088—Radiation using photocatalysts or photosensitisers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Disinfection or sterilisation of materials or objects, in general; Accessories therefor
- A61L2/16—Disinfection or sterilisation of materials or objects, in general; Accessories therefor using chemical substances
- A61L2/18—Liquid substances
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2103/00—Materials or objects being the target of disinfection or sterilisation
- A61L2103/05—Living organisms or biological materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/14—Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
- A61L2209/10—Apparatus features
- A61L2209/11—Apparatus for controlling air treatment
- A61L2209/111—Sensor means, e.g. motion, brightness, scent, contaminant sensors
Definitions
- the invention relates to a method for activating a compound
- a composite in the sense of the invention comprising at least one substrate and a layer system consisting of one or more layers deposited on the substrate.
- Titanium dioxide is often used for this.
- DE 102 10 465 A1 proposes to deposit a photocatalytically active thin layer on an open-pore carrier, titanium dioxide also being named as the photocatalytically active material.
- the action of light in the wavelength range from near UV triggers photocatalysis due to the chemical structure of the material. This inactivates organic contaminants and oxidatively decomposes them into carbon dioxide and water.
- UV activation is often carried out by sunlight and is therefore dependent on the time of day and weather.
- artificial illuminants used for UV If radiation is used indoors, for example, people in the area must be protected against the increased, harmful UV component. This either results in a short distance between the light source and the surface to be irradiated, in order to apply radiation with the lowest possible intensity, or requires UV treatment in a safe environment, ie no treatment is allowed during the treatment
- the invention is therefore based on the technical problem of creating a method for activating a photocatalytically active cover layer on a composite, by means of which the disadvantages of the prior art can be overcome.
- the method according to the invention it should also be possible with the method according to the invention to activate a photocatalytically active cover layer deposited on a composite, independently of the sunlight.
- the method according to the invention it should be possible with the method according to the invention to determine when a photocatalytically active cover layer should be activated.
- Deposited photocatalytically active cover layer only solutions are known in which radiation for activating the photocatalytically active cover layer strikes the cover layer surface from the outside. is activated by means of radiation by forming at least one element which generates radiation within the composite and below the photocatalytically active cover layer and which emits radiation for activating the photocatalytically active cover layer.
- the at least one radiation-generating first element can, for example, emit UV radiation which penetrates the photocatalytically active cover layer from the rear and which also activates the photocatalytically active cover layer on the surface of the cover layer.
- the method according to the invention can also be used to determine whether the surface of the photocatalytically active cover layer is contaminated and thus whether the photocatalytically active cover layer has to be activated at all.
- At least one light-generating second element and at least one sensor are formed within the composite and below the photocatalytically active cover layer, an actual value of a physical quantity characterizing light radiation being detected by means of the sensor, this
- Light radiation is emitted by a light-generating second element.
- the light-generating second element can either also be formed inside the composite and below the photocatalytically active cover layer, or alternatively can be arranged outside the composite.
- the actual value detected by means of the sensor is compared with a first threshold value and the at least one radiation-generating first element is switched on when the actual value falls below or exceeds the first threshold value. Whether falling below or exceeding the first threshold value leads to switching on of the at least one radiation-generating first element depends on which parameter of the light-generating second element is detected by the sensor.
- the intensity of the light radiation of the light-generating second element is detected by means of the sensor, which would be reduced by contamination of the surface of the photocatalytically active cover layer, then falling below the first threshold value leads to switching on of the at least one radiation-generating first element.
- the first element generating radiation is switched off again when an actual value detected by means of the at least one sensor (16; 26) exceeds a second threshold value, provided that the first setpoint value for switching on the at least one generating radiation is not reached , the first element leads or becomes the first element generating a radiation again
- FIG. 1 shows a component suitable for carrying out the method according to the invention in a schematic sectional illustration
- FIG. 2 shows an alternative component suitable for carrying out the method according to the invention in a schematic sectional illustration.
- a component 10 is shown schematically in a sectional view, with which the inventive method can be carried out.
- the component 10 comprises a substrate 11 and a layer system 12 deposited thereon, consisting of a number of
- the substrate 11 and the layer system 12 are collectively referred to in the sense of the invention as a composite.
- a photocatalytically active layer 13 was also deposited on the composite above the layer system 12.
- At least one first element 14 is formed below the photocatalytically active layer 13 and within the layer system 12, which one
- the first element 14 can, for example, generate UV radiation for activating the photocatalytically active layer 13.
- the first element 14 can also generate another radiation known from the prior art, by means of which a photocatalytically active layer can be activated.
- At least one light-generating second element 15 is also formed which, for example, emits light radiation that can be detected by a human eye.
- the light-generating second element 15 can also emit radiation in a different wavelength range, for example in the
- the light radiation from the light-generating second element can be used to determine whether the surface of the photocatalytically active cover layer 13 is contaminated.
- the light radiation generated by the second element that in FIG. 1 with one from the second element 15 the outgoing arrow is shown schematically, is at least partially reflected by the surface of the photocatalytically active layer 13 (dashed arrow in FIG. 1).
- the light radiation of the second element 15 reflected by the surface of the photocatalytically active layer 13 is detected by means of a sensor 16, the sensor 16 likewise being formed below the photocatalytically active cover layer 13 and within the layer system 12.
- Light radiation is forwarded to an evaluation device and compared with a target value for the intensity of the reflected light radiation.
- the evaluation device can, for example, be formed within the component 10 or, alternatively, can also be located outside the component 10. If an actual value falls below the target value, which is synonymous with the fact that the contamination on the surface of the photocatalytically active cover layer 13 has exceeded an undesirable degree of contamination, the evaluation device generates a first signal by means of which the radiation-generating first element 14 is switched on. As a result, the photocatalytically active cover layer 13 is activated, which causes degradation or at least inactivation of the contamination on the surface of the photocatalytically active cover layer 13.
- the actual values for the intensity of the reflected light radiation detected with the sensor 16 also increase again. If an actual value for the intensity of the reflected light radiation detected by the sensor 16 exceeds a second target value for the intensity of the reflected light radiation, which is equivalent to the fact that the
- the evaluation device When the surface of the photocatalytically active cover layer 13 has again reached a desired degree of purity, the evaluation device generates a second signal, by means of which the first element 14 generating a radiation is switched off.
- An embodiment according to FIG. 1 also has the advantage that no external radiation source for activating the photocatalytically active cover layer is necessary, which also ensures independence from daylight, with which photocatalytically active cover layers are often activated.
- bidirectional displays are known, for example, from WO 2012/163312 A1. These bidirectional displays comprise a composite consisting of a substrate and a layer system deposited thereon, wherein a multiplicity of light-emitting elements and a multiplicity of light-detecting elements are formed within the composite. Both the light-emitting elements and the
- light-detecting elements each arranged in a matrix and nested in one another, so that the light-emitting elements and the light-detecting elements are alternately formed side by side.
- Such a bidirectional display is suitable for implementing the procedure according to the invention described for FIG. 1.
- the procedure according to the invention described for FIG. 1 is suitable for implementing the procedure according to the invention described for FIG. 1.
- the bidirectional display is suitable for implementing the procedure according to the invention described for FIG. 1.
- a light-emitting elements and the light-detecting elements of a bidirectional display are divided into segments and in each segment at least one light-emitting element of the bidirectional display as a radiation-generating first element 14, at least one light-emitting element of the bidirectional display as light-generating second element 15 and at least one light-detecting element Element of the bidirectional display can be designed as a sensor 16. Furthermore, a photocatalytically active cover layer is deposited on the bidirectional display.
- a fingerprint sensor or a touch display for example, can be formed, which can independently recognize dirt on the surface and can remove or deactivate it independently of external radiation sources.
- one and the same component which is formed below the photocatalytically active cover layer 13 and within the composite, is used both as a radiation-generating first element 14 and also as a light-generating second element 15, with this component, for example radiation with lower power is generated in the
- the component 20 comprises a substrate 21 and a layer system 22 deposited thereon, consisting of a number of individual layers.
- the substrate 21 and the layer system 22 are collectively referred to in the sense of the invention as a composite.
- a photocatalytically active layer 23 was also deposited on the composite above the layer system 22.
- At least one first element 24 is formed below the photocatalytically active layer 23 and within the layer system 22, which one element
- the first element 24 can, for example, generate UV radiation for activating the photocatalytically active layer 23.
- the first element 24 can also generate another radiation known from the prior art, by means of which a photocatalytically active layer can be activated.
- At least one is outside the component 20
- the light-generating second element 25 which, for example, can generate light radiation in the wavelength range detectable by a human eye.
- the light-generating second element 25 is arranged in such a way that the surface of the photocatalytically active cover layer 23 can be irradiated with it.
- the light radiation from the light-generating second element 25 can be used to determine whether the surface of the photocatalytically active cover layer 23 is contaminated.
- Light radiation is detected by sensor 26.
- the actual values for the intensity of the light radiation detected by the sensor 26 are forwarded to an evaluation device and compared with a target value for the intensity of the light radiation.
- the evaluation device can be formed, for example, within the component 20 or, alternatively, outside of the component 20 are. If an actual value falls below the target value, which is synonymous with the fact that the contamination on the surface of the photocatalytically active cover layer 23 has exceeded an undesirable degree of contamination, the evaluation device generates a first signal by means of which the radiation-generating first element 24 is switched on. This activates the photocatalytically active cover layer 23, which causes the contamination on the surface of the photocatalytically active cover layer 23 to be reduced.
- the actual values for the intensity of the light radiation detected by the sensor 26 also increase again. If an actual value for the intensity of the light radiation detected by the sensor 16 exceeds a second target value for the intensity of the light radiation, which is equivalent to the fact that the surface of the photocatalytically active cover layer 23 has again reached a desired degree of purity, the
- Evaluation device a second signal by means of which the first element 24 generating a radiation is switched off.
- a layer which contains titanium dioxide can be used as the photocatalytically active cover layer in the process according to the invention and also in the exemplary embodiments described above.
- all other materials and materials known from the prior art can also be used for this layer deposition
- Combinations of these are used which are photocatalytically active.
- the photocatalytically active cover layer is doped with nitrogen during the layer deposition. It has been shown that layer material doped with nitrogen absorbs radiation for activating a photocatalytically active layer particularly well, thereby activating the photocatalytically active layer
- Top layer is improved. It is therefore particularly advantageous if the photocatalytic effective cover layer is formed with a nitrogen gradient in such a way that the photocatalytically active cover layer has the lowest nitrogen content at the boundary with the composite and the largest nitrogen content on the surface of the layer. This ensures that the photocatalytically active cover layer absorbs the radiation for activating the photocatalytically active cover layer, in particular in areas on the surface of the layer and thus where contamination of the photocatalytically active cover layer is to be reduced or inactivated.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Catalysts (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018118227.9A DE102018118227A1 (de) | 2018-07-27 | 2018-07-27 | Verfahren zum Aktivieren einer auf einem Verbund abgeschiedenen photokatalytisch wirksamen Deckschicht |
| PCT/EP2019/070058 WO2020021018A1 (de) | 2018-07-27 | 2019-07-25 | Verfahren zum aktivieren einer auf einem verbund abgeschiedenen photokatalytisch wirksamen deckschicht |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3829766A1 true EP3829766A1 (de) | 2021-06-09 |
Family
ID=67513492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19748493.4A Pending EP3829766A1 (de) | 2018-07-27 | 2019-07-25 | Verfahren zum aktivieren einer auf einem verbund abgeschiedenen photokatalytisch wirksamen deckschicht |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11918979B2 (de) |
| EP (1) | EP3829766A1 (de) |
| CN (1) | CN112512685A (de) |
| DE (1) | DE102018118227A1 (de) |
| WO (1) | WO2020021018A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220008574A1 (en) * | 2020-07-10 | 2022-01-13 | Accenture Global Solutions Limited | Self-cleaning devices using light sources arranged near the device surface |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10210465A1 (de) | 2002-03-04 | 2003-10-09 | Fraunhofer Ges Forschung | Photokatalytisches Element zur Aufspaltung von Wasserstoff enthaltenden Verbindungen |
| GB2391307A (en) * | 2003-03-13 | 2004-02-04 | Delphi Tech Inc | Self-cleaning optical sensor |
| CN100448258C (zh) * | 2005-06-03 | 2008-12-31 | 光宝科技股份有限公司 | 可清除本身脏污的电子装置以及其相关方法 |
| DE102007021104A1 (de) | 2006-05-03 | 2007-11-08 | Carl Freudenberg Kg | Antimikrobiell wirkende Lage und Verwendung dieser Lage |
| JP2007331546A (ja) * | 2006-06-14 | 2007-12-27 | Toyota Motor Corp | 車両用表示装置 |
| DE102007062258A1 (de) * | 2007-12-21 | 2009-06-25 | Robert Bosch Gmbh | Optische Regensensorvorrichtung für ein Kraftfahrzeug |
| JP5767403B2 (ja) | 2011-05-31 | 2015-08-19 | フラウンホーファー・ゲゼルシャフト・ツール・フェルデルング・デア・アンゲヴァンテン・フォルシュング・エー・ファウ | 双方向ディスプレイおよびその制御方法 |
| US9339571B2 (en) * | 2014-03-07 | 2016-05-17 | Sensor Electronic Technology, Inc. | Device for disinfecting a surface of an item using ultraviolet radiation |
| KR20160057072A (ko) * | 2014-11-13 | 2016-05-23 | 삼성전자주식회사 | 디스플레이 장치 및 그 제조 방법 |
| US9694739B2 (en) * | 2015-11-10 | 2017-07-04 | Ford Global Technologies, Llc | Disinfecting handle |
| CN206287864U (zh) * | 2016-09-26 | 2017-06-30 | 孙毅 | 一种能净化车内空气的汽车椅套 |
| US10195602B2 (en) * | 2016-12-01 | 2019-02-05 | GM Global Technology Operations LLC | Nucleation layers for enhancing photocatalytic activity of titanium dioxide (TiO2) coatings |
-
2018
- 2018-07-27 DE DE102018118227.9A patent/DE102018118227A1/de not_active Withdrawn
-
2019
- 2019-07-25 WO PCT/EP2019/070058 patent/WO2020021018A1/de not_active Ceased
- 2019-07-25 US US17/263,611 patent/US11918979B2/en active Active
- 2019-07-25 EP EP19748493.4A patent/EP3829766A1/de active Pending
- 2019-07-25 CN CN201980050226.3A patent/CN112512685A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20210291149A1 (en) | 2021-09-23 |
| DE102018118227A1 (de) | 2020-01-30 |
| US11918979B2 (en) | 2024-03-05 |
| CN112512685A (zh) | 2021-03-16 |
| WO2020021018A1 (de) | 2020-01-30 |
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