KR100376045B1 - photo-catalytic ecology diode lamp and gas purification system using this - Google Patents
photo-catalytic ecology diode lamp and gas purification system using this Download PDFInfo
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- KR100376045B1 KR100376045B1 KR10-2000-0025602A KR20000025602A KR100376045B1 KR 100376045 B1 KR100376045 B1 KR 100376045B1 KR 20000025602 A KR20000025602 A KR 20000025602A KR 100376045 B1 KR100376045 B1 KR 100376045B1
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- 230000001699 photocatalysis Effects 0.000 title description 3
- 238000000746 purification Methods 0.000 title description 2
- 239000011941 photocatalyst Substances 0.000 claims abstract description 31
- 230000007613 environmental effect Effects 0.000 claims abstract description 19
- 238000000465 moulding Methods 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 239000010703 silicon Substances 0.000 claims abstract description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910006404 SnO 2 Inorganic materials 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 239000003054 catalyst Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 12
- 239000007789 gas Substances 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000006552 photochemical reaction Methods 0.000 description 5
- 238000004887 air purification Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 230000000243 photosynthetic effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000005437 stratosphere Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 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
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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—Ultraviolet radiation
- A61L9/205—Ultraviolet 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
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- B01J21/063—Titanium; Oxides or hydroxides thereof
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- B01J23/14—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of germanium, tin or lead
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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
- 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
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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
- B01D2259/00—Type of treatment
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- B01D2259/804—UV light
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Abstract
본 발명에 따른 환경 다이오드는 자외선 영역의 파장대를 가지는 빛을 내는 발광 다이오드에 리드 프레임이 연결되어 있어 전류를 흐를 수 있도록 한다. 발광 다이오드는 실리콘으로 이루어진 렌즈로 덮여 있으며, 발광 다이오드와 렌즈는 광촉매와 실리콘으로 이루어진 광촉매 몰딩으로 덮여 있다. 따라서, 리드 프레임을 통해 전류가 흐르면 발광 다이오드는 자외선을 발하게 되고 렌즈를 통해 퍼진 빛은 광촉매를 활성화시켜 양공이 생성된다. 이 양공은 유해한 가스를 무해한 가스로 변환시키는 촉매로 작용하여 공기를 정화할 수 있다.In the environmental diode according to the present invention, a lead frame is connected to a light emitting diode that emits light having a wavelength band in the ultraviolet region, so that current can flow. The light emitting diode is covered with a lens made of silicon, and the light emitting diode and lens are covered with a photocatalyst molding made of a photocatalyst and silicon. Therefore, when a current flows through the lead frame, the light emitting diode emits ultraviolet rays, and the light spread through the lens activates the photocatalyst to generate holes. This hole acts as a catalyst to convert the harmful gas into a harmless gas to purify the air.
Description
본 발명은 환경 다이오드에 관한 것으로서, 더욱 상세하게는 자외선 발광 다이오드를 이용한 환경 다이오드에 관한 것이다.The present invention relates to an environmental diode, and more particularly to an environmental diode using an ultraviolet light emitting diode.
지구의 환경문제는 날로 심각해지고 있어 환경 친화적 공정 및 재료분야의 기술 개발이 크게 주목되고 있다. 특히 공기 정화의 분야에서 각종 광촉매(photo-catalyst)를 이용한 공기 정화기가 개발되고 있으며, 새로운 광촉매 재료의 개발도 이루어지고 있다.The environmental problems of the earth are getting serious day by day, and the development of technology in environmentally friendly processes and materials is drawing attention. In particular, in the field of air purification, air purifiers using various photo-catalysts have been developed, and new photocatalyst materials have also been developed.
자동차의 배기가스 중 CO(일산화탄소), HC(탄화수소), NO(산화질소) 등은 인체에 매우 유해하여 앞으로 주유소 및 지하 주차장 등에 의무적으로 이러한 유해 가스를 인체에 무해한 가스 CO2, H2O, N2등으로 변환할 수 있는 공기 정화기의 설치가 의무화될 전망이다. 일반적으로 광촉매 재료의 대부분은 공기 정화에 촉매로작용하는 양공(hole)의 생성을 위해 고에너지 즉 370 ㎚ 파장 정도의 자외선 영역의 광 에너지를 필요로 하고 있다. 그러나 지구 성층권에 존재하는 오존층이 대부분의 자외선을 흡수하므로 대기 중에는 광촉매를 활성화시킬 수 있는 자외선의 에너지 광 전자파는 거의 존재하지 않는다. 따라서, 공기 정화를 위한 공기 정화기의 제작에 인공적인 광 에너지를 이용하는 것이 보통이다. 이러한 광원으로는 할로겐, 크세논, 수은 램프 및 수은 형광등과 같은 플라스마식 광원이 대부분인데 이러한 광원을 이용하는 공기 정화기 시스템의 부피는 매우 크고, 대면적을 갖는 시스템을 제작하는 데에는 규모상의 제한이 많다.CO (carbon monoxide) in the automotive exhaust gas, HC (hydrocarbons), NO (nitric oxide), etc. is harmless to the human body for compulsory these harmful gas or the like is very harmful to the next gas station, and an underground parking lot to the human body the gas CO 2, H 2 O, Installation of an air cleaner that can convert to N 2 is expected to be mandatory. In general, most photocatalytic materials require high energy, ie, light energy in the ultraviolet region, on the order of 370 nm wavelength, to produce holes that catalyze air purification. However, since the ozone layer in the global stratosphere absorbs most of the ultraviolet rays, there are almost no energy light electromagnetic waves of ultraviolet rays that can activate photocatalysts in the atmosphere. Therefore, it is common to use artificial light energy in the fabrication of air cleaners for air purification. Most of these light sources are plasma light sources such as halogen, xenon, mercury lamps, and mercury fluorescent lamps. The volume of air purifier systems using such light sources is very large and there are large scale limitations in producing large-area systems.
또한, 이러한 광원들은 대부분 광촉매를 활성화시키기에 충분하고도 여분의 에너지가 생기므로 이 에너지는 열을 발생시키며 손실로 작용하여 에너지 효율이 떨어진다.In addition, most of these light sources generate enough energy to activate the photocatalyst, and thus this energy generates heat and acts as a loss, thereby reducing energy efficiency.
본 발명은 자외선 영역의 파장대를 가지는 빛을 발하는 다이오드를 환경 다이오드에 적용하여 광촉매를 활성화시킴으로써 공기를 정화할 수 있도록 하는 것이다.The present invention is to enable the purification of the air by activating the photocatalyst by applying a light emitting diode having a wavelength band of the ultraviolet region to the environmental diode.
도 1은 본 발명에 따른 환경 다이오드를 도시한 것이다.1 shows an environmental diode according to the invention.
이러한 과제를 해결하기 위해 본 발명에서는 발광 다이오드를 이용하여 환경 다이오드에 적용한다.In order to solve this problem, the present invention is applied to an environmental diode using a light emitting diode.
본 발명에 따른 환경 다이오드는 리드 프레임이 연결되어 있으며 발광 다이오드는 370 ㎚ 이하의 파장대를 가지는 빛을 내는 발광 다이오드와 렌즈, 그리고광촉매 몰딩으로 이루어진다.In the environmental diode according to the present invention, a lead frame is connected, and the light emitting diode includes a light emitting diode, a lens, and a photocatalyst molding that emit light having a wavelength band of 370 nm or less.
여기서, 렌즈는 실리콘으로 이루어질 수 있다.Here, the lens may be made of silicon.
또한, 광촉매 몰딩은 광촉매와 실리콘으로 이루어질 수 있으며, 이때 광촉매는 370 ㎚ 이하의 파장대를 가지는 광에 의해 활성화되는 물질로 TiO2또는 SnO2로 이루어질 수 있다.In addition, the photocatalyst molding may be made of a photocatalyst and silicon, wherein the photocatalyst may be made of TiO 2 or SnO 2 as a material activated by light having a wavelength band of 370 nm or less.
이때, 발광 다이오드는 AlInGaN/AlGaInN으로 이루어질 수도 있다.In this case, the light emitting diode may be made of AlInGaN / AlGaInN.
본 발명에 따른 공기 정화기는 리드 프레임이 연결되어 있으며, 발광 다이오드는 370 ㎚ 이하의 파장대를 가지는 빛을 내는 발광 다이오드, 렌즈 및 광촉매 몰딩을 포함하는 환경 다이오드를 포함한다.The air purifier according to the present invention has a lead frame connected thereto, and the light emitting diode includes an environmental diode including a light emitting diode having a wavelength band of 370 nm or less, a lens, and a photocatalyst molding.
이와 같이 본 발명에서는 자외선 영역의 파장대를 가지는 빛을 내는 발광 다이오드를 이용하여 광촉매를 활성화시키기 위한 광원으로 사용하고, 광촉매로부터 생성된 양공은 무해한 가스를 유해한 가스로 변환시키는 촉매로 작용한다. 따라서, 공기 정화기에 이용할 수 있다.As described above, the present invention is used as a light source for activating a photocatalyst by using a light emitting diode that emits light having a wavelength band in the ultraviolet region. Therefore, it can use for an air purifier.
그러면, 첨부한 도면을 참조하여 자외선 영역의 파장대를 가지는 빛을 발하는 발광 다이오드와 광촉매를 이용한 본 발명에 따른 환경 다이오드에 대하여 상세히 설명한다.Next, a light emitting diode emitting light having a wavelength band in the ultraviolet region and an environmental diode using the photocatalyst will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 환경 다이오드(photo-catalytic ecology diode lamp)를 도시한 것이다.1 shows a photo-catalytic ecology diode lamp according to the invention.
도 1에 도시한 바와 같이 환경 다이오드는 리드 프레임(20)이 연결되어 있는발광 다이오드(10)와 렌즈(30) 및 광촉매 몰딩(40)으로 이루어진다.As shown in FIG. 1, the environmental diode includes a light emitting diode 10 to which a lead frame 20 is connected, a lens 30, and a photocatalyst molding 40.
발광 다이오드(10)와 연결되어 있는 리드 프레임(20)은 외부로부터 전류를 공급받아 발광 다이오드(10)에 전류를 흐르게 함으로써 발광 다이오드(10)가 자외선을 발하도록 한다.The lead frame 20 connected to the light emitting diode 10 receives a current from the outside to flow the current through the light emitting diode 10 so that the light emitting diode 10 emits ultraviolet rays.
렌즈(30)는 실리콘(silicone)을 이용하여 1차 몰딩(molding)한 것으로 발광 다이오드(10)를 덮고 있으며, 이는 발광 다이오드(10)를 보호하고 빛을 골고루 퍼지게 하는 역할을 한다.The lens 30 is molded by using silicon (silicone) and covers the light emitting diode 10, which protects the light emitting diode 10 and spreads light evenly.
광촉매 몰딩(40)은 TiO2또는 SnO2와 같은 재료를 실리콘과 혼합하여 2차 몰딩한 것으로 발광 다이오드(10)로부터 자외선 영역의 빛을 받으면 표면에 양공이 생성되고 이 양공은 광촉매 몰딩(40)의 표면에서 인체에 유해한 NO, CO, HC와 같은 물질이 무해한 CO2, H2O, N2등으로 변환하는데 촉매로 작용한다.The photocatalyst molding 40 is a secondary molding by mixing a material such as TiO 2 or SnO 2 with silicon. When the light is received from the light emitting diode 10 in the ultraviolet region, holes are formed on the surface and the holes are photocatalyst molding 40. It acts as a catalyst to convert substances such as NO, CO and HC, which are harmful to the human body, into harmless CO 2 , H 2 O and N 2 .
본 발명에서는 돔(dome) 형으로 환경 다이오드를 형성하였으나, 표면실장형(surface mountained type)이나 리드선을 쓰지 않고 소자를 실장하는 플립칩(flip-chip)으로 형성할 수도 있다.In the present invention, an environmental diode is formed in a dome type, but may be formed as a surface-mounted type or a flip-chip in which a device is mounted without using a lead wire.
이러한 환경 다이오드를 이용하여 공기를 정화시키는 원리에 대하여 이하에서 설명한다.The principle of purifying air using such an environmental diode is described below.
대규모의 산업과 철도 및 차량의 운송 수단은 유독한 물질과 여러 가지 불순물을 가진 막대한 양의 가스를 대기로 방출한다. 이러한 유독한 물질과 불순물을 가진 가스를 정화하기 위해 다양한 방법이 시도되고 있다.Large industrial and rail and vehicle transports release massive amounts of gases into the atmosphere with toxic substances and various impurities. Various methods have been attempted to purify gases containing these toxic substances and impurities.
광화학 반응은 오래전부터 광합성 반응과 새로운 물질을 합성하거나 기질의 변화를 주는 화학 반응으로 많은 연구가 진행되어 왔다. 근래에 들어 이러한 광화학 반응은 태양에너지를 활용하여 폐수나 대기, 토양 등에 오염되고 있는 유독한 유기 물질의 산화 분해에 응용되기 시작하였다.Photochemical reactions have been studied for a long time as photosynthetic reactions and chemical reactions that synthesize new materials or change substrates. In recent years, photochemical reactions have been applied to the oxidative decomposition of toxic organic substances contaminated with wastewater, air, and soil by using solar energy.
대부분의 유기 물질들은 스스로는 태양광을 흡수하지 못하고 다른 물질의 도움을 필요로 한다. 따라서 태양광을 이용하여 수용액상의 유독성 유기 물질을 분해시키려면 태양광을 흡수하여 변이상태(transition state)를 거쳐 광 에너지에 의한 화학적 반응을 일으키는 데 도움을 주는 보조물이 필요하다. 이와 같은 물질들이 참여하는 화학적 반응을 광화학 반응이라 하고, 광화학 반응을 유발시키는 필수적인 보조 역할을 하는 물질을 광촉매라고 한다. 이러한 광촉매제들은 대개 n형 반도체적 특성을 지니고 있는 것이 많이 사용되고 있다. 이와 같은 광촉매의 역할은 반응의 활성화 에너지를 낮추어서 유기 물질의 산화 반응이 더 빨리 진행되게 도와주는 것이다.Most organic materials do not themselves absorb sunlight and require the help of other materials. Therefore, in order to decompose toxic organic substances in an aqueous solution using sunlight, an auxiliary material is needed to absorb sunlight and to cause chemical reactions due to light energy through a transition state. Chemical reactions involving these materials are called photochemical reactions, and materials that play an essential role in inducing photochemical reactions are called photocatalysts. These photocatalysts are generally used that have n-type semiconductor characteristics. The role of the photocatalyst is to lower the activation energy of the reaction to help the oxidation of the organic material proceed faster.
따라서, 광촉매가 태양광을 흡수하지 못하고 통과 또는 반사시킨다면, 광 에너지에 의한 반응은 발생할 수 없다. 왜냐하면 광반응이 일어나기 위해서는 물질의 분자들이 태양광을 흡수하여 최소한 활성화 에너지 이상의 광에너지hν가 필요하기 때문이다.Therefore, if the photocatalyst fails to absorb sunlight and passes or reflects, a reaction by light energy cannot occur. Because the photoreaction takes place, molecules of the material absorb sunlight and require a light energy hν at least above the activation energy.
이러한 광 에너지의 흡수는 분자에 의한 한 개의 광양자(single photon)를 잡는 과정에 해당하는데, 분자에 의하여 흡수된 양자가 초기 광화학 반응을 야기시킨다. 여기에서 하나의 광자가 흡수되었을 때 반드시 하나의 분자가 생성된다는것이 아니라 한 광자의 흡수로 인하여 여러 분자를 생성시킬 수도 있다는 의미이다.This absorption of light energy corresponds to the process of capturing a single photon by a molecule, protons absorbed by the molecule cause an initial photochemical reaction. This does not necessarily mean that one molecule is produced when one photon is absorbed, but that it can also produce multiple molecules due to the absorption of one photon.
광촉매 반응에 가장 많이 사용되는 촉매 중의 하나는 티타늄 이산화물(titanium dioxide ; TiO2)이다. 일반적인 금속류 물질과는 달리 반도체 물질들은 에너지적으로 서로 겹쳐지지 않는 두 가지의 띠(band)를 지니고 있다. 금속 산화물(metal oxide) 반도체 성질의 촉매들은 그 표면에 각각의 띠 에너지(band gap energy) 이상에 해당하는 파장의 광 에너지를 흡수하게 되면 자신이 지니고 있는 전자들로 채워져 있는 가전자대로부터 전자가 비어 있는 전도대로 이동하여 가전자대와 전도대 간에 전자(electron)-양공(hole) 분리하전쌍(charge-separated pair)을 형성하면서 빠져나가게 된다. 이를 아래 화학식에 나타내었다.One of the most used catalysts for photocatalytic reactions is titanium dioxide (TiO 2 ). Unlike general metal materials, semiconductor materials have two bands that do not overlap each other energetically. Catalysts of metal oxide semiconducting properties absorb electrons from the valence band filled with their own electrons when they absorb light energy with wavelengths above the band gap energy on their surface. They move out of the conduction band, leaving the electron-hole-charge-separated pair between the valence band and the conduction band. This is shown in the formula below.
이와 같이 광촉매로부터 생성된 양공은 아래의 화학식에 나타낸 것과 같이 유해한 물질이 무해한 물질로 변환하는데 촉매로 작용한다.As described above, the hole generated from the photocatalyst serves as a catalyst for converting harmful substances into harmless substances as shown in the following chemical formula.
광촉매로부터 양공을 형성시키기 위해 광촉매에 광 에너지를 제공하는 광원으로 자외선 영역의 파장대를 가지는 발광 다이오드를 이용할 수 있다. 이때, 발광 다이오드는 GaN계열의 반도체로서 빛의 파장이 370 ㎚ 미만이며, 3.35 eV 이상의 에너지를 가지는 것을 이용하는데, AlInGaN/AlGaInN과 같은 것을 이용할 수 있다.In order to form holes from the photocatalyst, a light emitting diode having a wavelength band in the ultraviolet region may be used as a light source for providing light energy to the photocatalyst. In this case, the light emitting diode is a GaN-based semiconductor having a wavelength of light of less than 370 nm and having an energy of 3.35 eV or more, but may be one such as AlInGaN / AlGaInN.
이와 같이 본 발명에서는 자외선 영역 대의 빛을 내는 발광 다이오드를 이용하여 광촉매의 양공을 생성하기 위한 광원으로 사용할 수 있으며, 이를 이용하여 유해한 가스를 무해한 가스로 변환시키는 공기 정화 시스템에 적용할 수도 있다.As described above, the present invention can be used as a light source for generating holes in the photocatalyst using light emitting diodes emitting light in the ultraviolet region, and can be applied to an air purification system that converts harmful gases into harmless gases.
또한, 발광 다이오드를 이용하여 불필요한 에너지의 손실을 막아 에너지 효율도 높일 수 있다.In addition, it is possible to increase energy efficiency by preventing unnecessary energy loss using a light emitting diode.
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| JPH098361A (en) * | 1995-06-19 | 1997-01-10 | Toyoda Gosei Co Ltd | Light emitting diode |
| JPH0938190A (en) * | 1995-07-28 | 1997-02-10 | Toyoda Gosei Co Ltd | Antibacterial deodorizing box |
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| JPH11309202A (en) * | 1998-04-28 | 1999-11-09 | Hitachi Ltd | Light source for photocatalyst |
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| JPH098361A (en) * | 1995-06-19 | 1997-01-10 | Toyoda Gosei Co Ltd | Light emitting diode |
| JPH0938190A (en) * | 1995-07-28 | 1997-02-10 | Toyoda Gosei Co Ltd | Antibacterial deodorizing box |
| JPH0938503A (en) * | 1995-07-28 | 1997-02-10 | Toyoda Gosei Co Ltd | Photocatalyst device |
| JPH1031434A (en) * | 1996-02-29 | 1998-02-03 | Toshiba Lighting & Technol Corp | Light emitting diode, display unit and display device |
| JPH09299456A (en) * | 1996-05-20 | 1997-11-25 | Toyoda Gosei Co Ltd | Photocatalyst apparatus |
| JPH10277367A (en) * | 1997-04-04 | 1998-10-20 | Sanyo Electric Co Ltd | Apparatus for deodorization-sterilization |
| JPH1187770A (en) * | 1997-09-01 | 1999-03-30 | Toshiba Electron Eng Corp | Lighting appliance, reader, projector, purifier and display device |
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