KR20010084638A - photocatalytic purifier for LED - Google Patents
photocatalytic purifier for LED Download PDFInfo
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- KR20010084638A KR20010084638A KR1020000009830A KR20000009830A KR20010084638A KR 20010084638 A KR20010084638 A KR 20010084638A KR 1020000009830 A KR1020000009830 A KR 1020000009830A KR 20000009830 A KR20000009830 A KR 20000009830A KR 20010084638 A KR20010084638 A KR 20010084638A
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- 230000001699 photocatalysis Effects 0.000 title description 2
- 239000011941 photocatalyst Substances 0.000 claims abstract description 63
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 15
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 10
- 239000000356 contaminant Substances 0.000 claims description 9
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 3
- 239000003054 catalyst Substances 0.000 claims 1
- 238000001228 spectrum Methods 0.000 abstract description 4
- 230000001590 oxidative effect Effects 0.000 abstract description 3
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 6
- 239000000779 smoke Substances 0.000 description 5
- 241000208125 Nicotiana Species 0.000 description 4
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000005284 excitation Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- -1 hydrogen radical peroxide Chemical class 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 235000021109 kimchi Nutrition 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
- B01D53/885—Devices in general for catalytic purification of waste gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- 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—Ultra-violet radiation
- A61L9/205—Ultra-violet radiation using a photocatalyst or photosensitiser
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- 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
-
- B01J35/39—
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
- F24F8/167—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means using catalytic reactions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/95—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying specially adapted for specific purposes
- F24F8/97—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying specially adapted for specific purposes for removing tobacco smoke
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20707—Titanium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
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Abstract
Description
본 발명은 공기중에 함유된 휘발성 유기물질이나 담배연기 등 각종 오염물질을 광촉매를 이용하여 제거하는 광촉매 정화기에 관한 것으로, 특히 자외선 영역(U.V)의 발광다이오드(이하, LED라 한다)에 광촉매를 직접 코팅시켜 광촉매를 여기시키는 LED를 이용한 광촉매 정화기에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photocatalyst purifier that removes various contaminants such as volatile organic substances and tobacco smoke contained in the air by using a photocatalyst. In particular, the photocatalyst is directly applied to a light emitting diode (hereinafter referred to as an LED) in the ultraviolet region (UV). A photocatalyst purifier using an LED that coats and excites a photocatalyst.
일반적으로, 공기중에 함유된 휘발성 유기물질이나 담배연기 등 각종 오염물질을 제거하는 공기정화기는 자외선 램프와 광촉매를 포함하여 구성된다.In general, an air purifier for removing various contaminants such as volatile organic substances or tobacco smoke contained in the air includes an ultraviolet lamp and a photocatalyst.
상기와 같이 구성된 공기정화기에서, 자외선램프로부터 광촉매를 향해 자외선이 조사되면 광촉매는 자외선램프로부터 자외선을 받아 밴드갭 이상에 해당하는 광에너지를 흡수하면, 광촉매내의 가전자대에 채워진 전자들이 전도대로 이동하는 전자의 여기현상이 일어난다.In the air purifier configured as described above, when ultraviolet rays are irradiated from the ultraviolet lamp toward the photocatalyst, the photocatalyst receives the ultraviolet rays from the ultraviolet lamp and absorbs the light energy corresponding to the bandgap or more. The former excitation phenomenon occurs.
전자가 여기되면 가전자대에 남아있는 정공에 휘발성 유기물질이나 담배연기 등과 같은 각종 오염물질이 전자의 도너로서 작용하여 실내공기중에 함유된 각종 오염물질을 산화시켜 분해함으로서 실내공기를 정화하도록 되어 있다.When electrons are excited, various contaminants such as volatile organic substances and tobacco smoke, etc. act as donors of electrons to the holes remaining in the valence band to oxidize and decompose various contaminants contained in the indoor air to purify the indoor air.
그런데, 이와같은 종래 광촉매를 이용한 공기정화기 시스템에 있어서는, 광촉매를 여기시키기 위한 여기광원으로 자외선 영역의 저항열전자방출식(예를들면, 전구), 플라즈마식(예를들면, 형광등)을 이용하므로 고에너지(30~40V이상)가 필요하며, 고에너지 전원이 있는 곳에서만 작동이 가능하다는 문제점이 있었다.By the way, in the air purifier system using the conventional photocatalyst, the resistive thermoelectron emission formula (e.g., light bulb) and plasma type (e.g., fluorescent lamp) in the ultraviolet region are used as the excitation light source for exciting the photocatalyst. Energy (30 ~ 40V or more) is required, there was a problem that can operate only in the presence of a high energy power source.
또한, 분광 스펙트럼에서 불필요한 에너지 대역의 발광 에너지 소모로 에너지 효율이 떨어지고, 광원의 부피 및 내구성에 한계가 있어 시스템 구성시 규모 및 설치에 한계가 있다는 문제점이 있었다.In addition, there is a problem in that the energy efficiency is reduced due to the consumption of light emission energy of the unnecessary energy band in the spectral spectrum, there is a limit in the volume and durability of the light source, there is a limit in the size and installation when configuring the system.
따라서, 본 발명은 상술한 종래의 문제점을 해결하기 위하여 안출된 것으로, 자외선 영역(U.V)의 LED에 광촉매를 직접 코팅시켜 저에너지(3~5V)에서 광촉매를 구동시킬 수 있는 LED를 이용한 광촉매 정화기를 제공하는데 그 목적이 있다.Accordingly, the present invention has been made to solve the above-described problems, the photocatalyst purifier using an LED that can drive the photocatalyst at low energy (3 ~ 5V) by directly coating the photocatalyst on the LED in the ultraviolet region (UV) The purpose is to provide.
본 발명의 다른 목적은, 광촉매에 양공 캐리어를 여기하는데 필요한 에너지 대역의 광 스펙트럼만 이용하므로 에너지 효율이 좋은 LED를 이용한 광촉매 정화기를 제공하는데 있다.Another object of the present invention is to provide a photocatalyst purifier using LEDs having energy efficiency because only the light spectrum of the energy band required to excite a positive hole carrier is used for the photocatalyst.
본 발명의 또다른 목적은, LED를 이용하므로 시스템의 수명을 획기적으로 증가시킬 수 있고, 소형화가 가능하여 정화 효율을 높일 수 있는 LED를 이용한 광촉매 정화기를 제공하는데 있다.Still another object of the present invention is to provide a photocatalyst purifier using LEDs that can significantly increase the lifespan of the system, and can be miniaturized to increase the purification efficiency by using LEDs.
도 1은 본 발명에 의한 LED를 이용한 광촉매 정화기의 구성도,1 is a block diagram of a photocatalyst purifier using the LED according to the present invention,
도 2는 본 발명에 적용되는 광촉매의 작용원리를 설명하는 특성도.Figure 2 is a characteristic diagram explaining the principle of operation of the photocatalyst applied to the present invention.
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>
10 : 전원부 12 : 캐소드10: power supply unit 12: cathode
14 : 애노드 20 : 인슐레이터14: anode 20: insulator
30 : LED 40 : 광전송로30: LED 40: optical transmission path
50 : 자외선투과부 60 : 광촉매50: ultraviolet light transmission unit 60: photocatalyst
상기 목적을 달성하기 위하여 본 발명에 의한 LED를 이용한 광촉매 정화기는, 저에너지의 직류전압을 공급하는 전원부와, 상기 전원부로부터 직류전압을 공급받아 자외선 파장대의 광에너지를 방사하는 LED와, 상기 LED로부터 방사되는 자외선을 받아 밴드갭 이상의 광에너지를 흡수하여 오염물질을 산화시켜 분해하는 광촉매로 구성된 것을 특징으로 한다.In order to achieve the above object, the photocatalyst purifier using the LED according to the present invention includes a power supply unit for supplying a low energy direct current voltage, an LED for supplying a direct voltage from the power supply unit to emit light energy in an ultraviolet wavelength band, and radiation from the LED. It is characterized by consisting of a photocatalyst that receives the ultraviolet light to absorb light energy of more than the band gap to oxidize and decompose contaminants.
또한, 본 발명은 상기 LED로부터 방사되는 자외선을 전송하는 광전송로와, 상기 광전송로를 통해 전송된 자외선을 투과시켜 상기 광촉매에 조사하는 자외선투과부를 추가로 구비한 것을 특징으로 한다.In addition, the present invention is characterized in that it further comprises an optical transmission path for transmitting the ultraviolet rays emitted from the LED, and an ultraviolet transmission unit for transmitting the ultraviolet rays transmitted through the optical transmission path to the photocatalyst.
상기 광촉매는 상기 자외선투과부의 표면에 광촉매제를 직접 코팅하여 형성하며, 이산화티탄을 주촉매로 하는 광촉매 필름인 것을 특징으로 한다.The photocatalyst is formed by directly coating a photocatalyst on the surface of the ultraviolet light transmitting unit, and characterized in that the photocatalyst film is mainly composed of titanium dioxide.
이하, 본 발명의 일실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 의한 LED를 이용한 광촉매 정화기의 구성도이다.1 is a block diagram of a photocatalyst purifier using the LED according to the present invention.
도 1에 도시한 바와같이, LED를 이용한 광촉매 정화기는 캐소드(12) 및 애노드(14)로 구성된 전원부(10)와; 상기 캐소드(12) 및 애노드(14)를 절연시켜주는 인슐레이터(20)와; 상기 전원부(10)로부터 전압을 공급받아 자외선(U.V)을 방사하는LED(30)와; 상기 LED(30)로부터 방사되는 자외선을 전송하는 광기능성 유리 재질의 광전송로(40)와; 상기 광전송로(40)를 통해 전송된 자외선을 투과시키는 자외선투과부(50)와; 상기 자외선투과부(50)를 통해 투과된 자외선을 받아 밴드갭 G이상의 에너지를 갖는 파장의 광으로 여기되면 내부에 전자, 정공쌍을 생성하는 광촉매(60)로 구성되어 있다.As shown in FIG. 1, the photocatalyst purifier using LEDs includes a power supply unit 10 composed of a cathode 12 and an anode 14; An insulator (20) that insulates the cathode (12) and the anode (14); An LED 30 which receives a voltage from the power supply unit 10 and emits ultraviolet rays (U.V); An optical transmission path 40 made of an optical functional glass material for transmitting ultraviolet rays emitted from the LED 30; An ultraviolet transmission part 50 for transmitting ultraviolet light transmitted through the optical transmission path 40; When the ultraviolet light transmitted through the ultraviolet ray transmitting part 50 is excited to light having a wavelength of more than the band gap G, the photocatalyst 60 generates electrons and hole pairs therein.
상기 전원부(10)는 전력소모가 적은 LED(30)를 구동시킬 수 있는 3~5V(저에너지)의 직류 전압을 발생하고, 상기 LED(30)는 상기 전원부(10)로부터 3~5V(저에너지)의 직류전압을 공급받아 350~400nm의 자외선 파장대의 광에너지를 발생시키는 갈륨나이트(GaN) 재질의 U.V(자외선 영역)의 반도체 LED이다.The power supply unit 10 generates a DC voltage of 3 to 5V (low energy) capable of driving the LED 30 with low power consumption, and the LED 30 is 3 to 5V (low energy) from the power supply unit 10. It is a UV (ultraviolet region) semiconductor LED made of gallium nitrite (GaN) that generates light energy in the ultraviolet wavelength range of 350 to 400 nm by receiving a DC voltage of.
상기 광촉매(60)는 조사된 광에너지를 화학적 에너지로 변환시킬 수 있는 이산화티탄(TiO2) 필름으로 상기 자외선투과부(50)의 표면에 코팅되어 있으며, 이산화티탄 분말을 폴리머와 혼합해서 코팅용 paste를 제조하고, 상기 코팅용 paste를 유리제품, 실리카겔, 다공성 세라믹스 및 비다공성 세라믹스 중 어느 하나의 담체 표면에 얇게 코팅한 후 건조 및 열처리하여 제조한다.The photocatalyst 60 is a titanium dioxide (TiO 2 ) film which can convert irradiated light energy into chemical energy and is coated on the surface of the UV transmitting part 50, and the titanium dioxide powder is mixed with a polymer to coat the paste. To prepare the coating paste is a thin coating on the surface of the carrier of any one of glass, silica gel, porous ceramics and non-porous ceramics, and then dried and heat treated.
도 2는 본 발명에 적용되는 광촉매의 작용원리를 설명하는 특성도이다.2 is a characteristic diagram illustrating the principle of operation of the photocatalyst applied to the present invention.
도 2에 도시한 바와같이, 상기 광촉매(60)는 가전자대 E, 전도대 D, 밴드갭 G를 가지며, 밴드갭 G는 광촉매(60)의 고유값으로 이산화티탄(TiO2)의 경우 약 3eV로 파장으로 환산하면 400nm이다.As shown in FIG. 2, the photocatalyst 60 has a valence band E, a conduction band D, and a bandgap G, and the bandgap G is an intrinsic value of the photocatalyst 60 at about 3eV in the case of titanium dioxide (TiO 2 ). In terms of wavelength, it is 400 nm.
상기 이산화티탄(TiO2) 광촉매(60)에 광에너지가 조사되면 광촉매(60) 내부에 전자 e-, 정공 h+쌍이 생성되어 표면으로 취출되고, 흡착물질과 반응시키면 A는 A-로 환원되고 알칼리 R은 R+로 산화되어 광촉매 반응이 일어난다.When the light energy is irradiated onto the titanium dioxide (TiO 2 ) photocatalyst 60, electrons e − , hole h + pairs are generated inside the photocatalyst 60, are extracted to the surface, and when reacted with an adsorbent, A is reduced to A − . Alkali R is oxidized to R + to cause a photocatalytic reaction.
한편, 상기 광촉매(60)는 이산화티탄(TiO2)으로 제한되는 것은 아니며, 산화텅스텐(WO3) 또는 산화아연과 같은 금속산화물의 단일 또는 복합물을 사용하여도 좋다.On the other hand, the photocatalyst 60 is not limited to titanium dioxide (TiO 2 ), it may be used a single or a composite of a metal oxide such as tungsten oxide (WO 3 ) or zinc oxide.
이하, 상기와 같이 구성된 LED를 이용한 광촉매 정화기의 작용효과를 설명한다.Hereinafter, the effect of the photocatalyst purifier using the LED configured as described above will be described.
먼저, 전원부(10)의 캐소드(12)와 애노드(14)를 통해 3~5V(저에너지)의 직류전압이 공급되면, 상기 전원부(10)로부터 공급되는 직류전압(3~5V)을 갈륨나이트(GaN) 재질의 LED(30)에서 인가받아 350~400nm 자외선 파장대(U.V)의 광에너지를 방사한다.First, when a DC voltage of 3 to 5V (low energy) is supplied through the cathode 12 and the anode 14 of the power supply unit 10, the DC voltage (3 to 5V) supplied from the power supply unit 10 is converted into gallium knight ( It is applied from the LED 30 of the GaN) material and emits light energy in the 350 ~ 400nm ultraviolet wavelength band (UV).
상기 LED(30)에서 방사되는 350~400nm의 자외선(U.V)은 유리 재질의 광전송로(40)를 통해 전송되고, 상기 광전송로(40)를 통해 전송된 자외선은 자외선투과부(50)를 투과하여 광촉매(60)에 조사된다.The 350-400 nm ultraviolet (UV) emitted from the LED 30 is transmitted through the optical transmission path 40 made of glass, and the ultraviolet rays transmitted through the optical transmission path 40 pass through the UV transmission unit 50. The photocatalyst 60 is irradiated.
따라서, 상기 광촉매(60)는 자외선투과부(50)를 투과하여 조사된 350~400nm의 자외선(U.V)을 받아 밴드갭 G 이상의 에너지를 갖는 파장의 광으로 여기되면, 광촉매(60)내의 가전자대 E에 채워진 전자들이 도 2에 도시한 바와같이, 전도대 D로 이동하는 전자의 여기 현상으로 전자 e-가 빠져나간 곳에 정공 h+가 생기게 되는데, 이러한 상태가 광촉매(60)의 여기상태이다.Therefore, when the photocatalyst 60 is excited with light having a wavelength of G or greater than the bandgap G by receiving 350-400 nm ultraviolet rays (UV) irradiated through the ultraviolet ray transmitting part 50, the valence band E in the photocatalyst 60 is As shown in FIG. 2, holes h + are generated where electrons e − are released due to excitation of electrons moving to the conduction band D, as shown in FIG. 2, which is an excited state of the photocatalyst 60.
이때, 여기 전자 e-가 갖는 환원력보다 정공 h+이 갖는 산화력이 훨씬 크므로, 전자 e-가 여기되면 가전자대 E에 남아있는 정공 h+에 실내공기중에 함유된 휘발성 유기물질이나 담배연기 등과 같은 각종 오염물질이 전자의 도너로서 작용하여 각종 오염물질을 산화시켜 분해함으로서 광촉매(60)의 표면으로부터 아래와 같은 화학반응이 발생하여 실내공기가 정화되는 것이다.In this case, the excited electrons e - are reducing power to much larger than the oxidizing power with a hole h + having, e e - here Once, such as volatile organic substances or cigarette smoke contained in the indoor air in the hole h + remaining in the valence band E Various contaminants act as electron donors to oxidize and decompose various contaminants such that the following chemical reactions occur from the surface of the photocatalyst 60 to purify indoor air.
VOC(휘발성 유기화합물) → CO2+ H2O + Mineral acid(무기산)VOC (volatile organic compound) → CO 2 + H 2 O + Mineral acid
따라서, 350~400nm의 광에너지를 광촉매(60)에 조사하면 공기 속의 유기물은 물(H2O)과 이산화탄소(CO2)로 산화되어 냄새는 제거된다.Therefore, when the light energy of 350 ~ 400nm is irradiated to the photocatalyst 60, the organic matter in the air is oxidized to water (H 2 O) and carbon dioxide (CO 2 ) to remove the smell.
광촉매(60) 탈취 반응은 상온에서 가능하며 산소의 환원에 의해 생성된 O2는 과산화수소를 거쳐 보다 산화력이 강한 수산 래디컬 OH로 되기도 하고 혹은 물과 산소로 된다.The photocatalyst 60 deodorization reaction is possible at room temperature, and O 2 generated by the reduction of oxygen may be hydrogen radical peroxide, which is more oxidative, or becomes water and oxygen.
한편, 본 발명의 일실시예에서는 실내공기중에 함유된 휘발성 유기물질이나 담배연기 등과 같은 각종 오염물질을 제거하는 공기정화를 예로들어 설명하였으나, 본 발명은 이에 한정되지 않고 유해물질을 포함한 각종 폐수 즉, 상·하수도, 산업폐수 처리, 한국형 냉장고에서 김치 등의 냄새 제거, 해상에서 원유유출에 의한 해상오염 처리 등에 이용하여도 본 발명과 동일한 목적 및 효과를 달성할 수 있음은 물론이다.Meanwhile, in one embodiment of the present invention, the air purification for removing various contaminants such as volatile organic substances or tobacco smoke contained in indoor air is described as an example, but the present invention is not limited thereto. In addition, water and sewage, industrial wastewater treatment, the removal of odors such as kimchi in the Korean refrigerator, marine pollution treatment by oil spills at sea can be achieved the same purpose and effect of the present invention.
또한, 본 발명의 일실시예에서는 캐소드(12)와 애노드(14)로 구성된 전원부(10)를 이용하여 반도체 LED(30)에 전원을 공급하는 것을 예로들어 설명하였으나, 본 발명은 이에 한정되지 않고 광촉매 정화기내에 배터리 등을 내장하여 전원을 공급하여도 본 발명과 동일한 목적 및 효과를 달성할 수 있음은 물론이고, 이에 따라 전원이 없는 공간에서도 사용이 가능한 것이다.In addition, the embodiment of the present invention has been described taking power supply to the semiconductor LED 30 using the power supply unit 10 including the cathode 12 and the anode 14 as an example, but the present invention is not limited thereto. Even if a power supply is embedded in a photocatalyst purifier, the same purpose and effect as the present invention can be achieved, and accordingly, the battery can be used even in a space without a power source.
또, 본 발명의 일실시예에서는 차세대 대체에너지원인 수소를 광촉매(60) 물 분해 반응으로부터 얻을 수 있으며 이 경우 청정 에너지 개발로 환경오염문제도 같이 해결할 수 있음은 물론이다.In addition, in one embodiment of the present invention, hydrogen, which is a next-generation alternative energy source, can be obtained from the photocatalytic decomposition of water (60), and in this case, environmental pollution can be solved with clean energy development.
상기의 설명에서와 같이 본 발명에 의한 LED를 이용한 광촉매 정화기에 의하면, 자외선 영역(U.V)의 LED에 광촉매를 직접 코팅시켜 저에너지(3~5V)에서 광촉매를 구동시킬 수 있으며, 전원이 없는 공간에서도 정화 시스템을 가동시킬 수 있다는 효과가 있다.As described above, according to the photocatalyst purifier using the LED according to the present invention, the photocatalyst is directly coated on the LED in the ultraviolet region (UV) to drive the photocatalyst at low energy (3 to 5V), even in a space without power. The effect is that the purge system can be operated.
그리고, 본 발명에 의하면, 광촉매에 양공 캐리어를 여기하는데 필요한 에너지 대역의 광 스펙트럼만 이용하므로 에너지 효율이 좋다는 효과가 있다.In addition, according to the present invention, since only the light spectrum of the energy band required for exciting the positive hole carrier is used for the photocatalyst, the energy efficiency is good.
또한, 본 발명에 의하면, LED를 이용하므로 시스템의 수명을 획기적으로 증가시킬 수 있고, 소형화가 가능하여 정화 효율을 높일 수 있다는 효과가 있다.In addition, according to the present invention, the LED can be used to significantly increase the life of the system, it is possible to miniaturize and increase the purification efficiency.
Claims (4)
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| KR1020000009830A KR100355667B1 (en) | 2000-02-28 | 2000-02-28 | photocatalytic purifier for LED |
| PCT/KR2001/000302 WO2001064318A1 (en) | 2000-02-28 | 2001-02-28 | Photocatalytic led purifier |
| AU2001237753A AU2001237753A1 (en) | 2000-02-28 | 2001-02-28 | Photocatalytic led purifier |
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| KR100598320B1 (en) * | 2004-11-09 | 2006-07-10 | 동양매직 주식회사 | Photocatalysts filter module and air cleaner mounted the same |
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| US7125526B2 (en) * | 2003-11-26 | 2006-10-24 | Carrier Corporation | Solid state ultraviolet photocatalytic oxidation system |
| ITSA20080012A1 (en) * | 2008-05-29 | 2009-11-30 | Univ Degli Studi Salerno | CATALYTIC PHOTOREACTOR WITH HIGH LIGHT EFFICIENCY FOR INTENSIFIED PHOTOSSIDATION PROCESSES |
| WO2010142004A2 (en) | 2009-06-10 | 2010-12-16 | Katholieke Universifeit Leuven | Controlled biosecure aquatic farming system in a confined environment |
| ITUA20162473A1 (en) * | 2016-04-11 | 2017-10-11 | Noka S R L | SYSTEM FOR ILLUMINATING ENVIRONMENTS AND PURIFYING THEIR AIR WITH PHOTOCATALYSIS |
| CN108905611A (en) * | 2018-08-02 | 2018-11-30 | 成都四维福腾环保设备有限公司 | A kind of device and method removing VOC |
| CN109794155A (en) * | 2019-03-22 | 2019-05-24 | 浙江大学苏州工业技术研究院 | The method for handling VOCs and foul gas |
| CN110425677B (en) * | 2019-08-06 | 2021-09-10 | 上海福元昌生物科技有限公司 | Photocatalytic air purifier for livestock and poultry breeding greenhouse |
| CN113648948A (en) * | 2021-08-31 | 2021-11-16 | 泊菲莱(镇江)智能设备有限公司 | A high-efficient compact photocatalytic reaction device for catalyst detects |
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| JP3658800B2 (en) * | 1995-06-19 | 2005-06-08 | 豊田合成株式会社 | Light emitting diode |
| JPH11165038A (en) * | 1997-12-03 | 1999-06-22 | Sanyo Electric Co Ltd | Ethylene removing device provided with palladium catalyst and photocatalyst |
| JPH11309202A (en) * | 1998-04-28 | 1999-11-09 | Hitachi Ltd | Illuminant for photocatalyst |
| JP3700905B2 (en) * | 1998-05-06 | 2005-09-28 | 豊田合成株式会社 | Air cleaner |
| JP2000015108A (en) * | 1998-07-07 | 2000-01-18 | Shin Meiwa Ind Co Ltd | Catalytic structure and water treating apparatus using the same |
| KR200166391Y1 (en) * | 1999-08-04 | 2000-02-15 | 김진원 | A disinfecting deodorizer |
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| KR100598320B1 (en) * | 2004-11-09 | 2006-07-10 | 동양매직 주식회사 | Photocatalysts filter module and air cleaner mounted the same |
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