Photocatalyst self-cleaning nano-coating

Transcription

1 Photocatalyst self-cleaning nano-coating

2 About us Sunlight Eco-tech Limited is a company that provides customers with energy conversion systems and solutions to improve energy efficiency. We offer clean energy such as solar power generation, energy-saving products making use of Photocatalyst self-cleaning nano-coating technology, smart grids and green efficient transportation. Our goal is to make the most using the least: To increase energy efficiency without increasing cost. Making use of less resources and cause the least damage in exchange for more energy supply and efficiency.

3 Introduce to nanophotocatalyst Photocatalyst is a general term for photocatalytic photo-semiconductor materials represented by nanosized titanium dioxide. It is coated on the surface of the substrate and generates strong catalytic degradation under the action of ultraviolet light. It can effectively degrade the toxic in the air. Harmful gas; it also has super-hydrophilic properties. Spraying on the glass surface can keep the glass clean and transparent for a long time.

4 Nanophotocatalyst principle Under the irradiation of light, nano-tio2 will produce photocatalytic reaction similar to photosynthesis, producing free hydroxyl groups and active oxygen with strong oxidizing ability. It has strong photo-oxidation and reduction function, and can oxidize and decompose various organic compounds and parts. Inorganic substances, which can destroy bacterial cell membranes and proteins that cure viruses, can kill bacteria and decompose organic pollutants, and decompose organic pollutants into nonpolluting water (H2O) and carbon dioxide (CO2), thus having strong sterilization and elimination. Stinky, anti-mildew, antifouling and self-cleaning, purifying air function. The photocatalyst is characterized in that the oxygen molecules and water molecules in the air are used to convert the organic matter in contact with carbon dioxide and water, and the material that can not be changed by itself, but can promote chemical reaction, is theoretically valid for a long period of time and has low maintenance cost. At the same time, titanium dioxide itself is non-toxic and harmless. It is the safest and cleanest environmental purification material in the world. It is widely used in the world Sterilizing UV lamp Nano titanium dioxide photocatalyst Germs, viruses and organic pollutants Photocatalyst absorbs ultraviolet light Bacterias and viruses being destroyed by OH Bacteria, viruses and organic pollutants/allerg ens are broken down carbon dioxide Eventually decomposed into pollution-free water vapor and carbon dioxide

5 Features and advantages 1. TiO2 is an environmentally friendly product. It is a water-based coating. It has a volatile organic pollutant content of less than 3g/L and does not contain any heavy metals. It is non-toxic and harmless and safe and reliable for human body. 2. High dispersion of nanoparticles with an average particle size of 5 nm 3. Under the photocatalysis, it can effectively kill a variety of bacteria, the antibacterial rate is as high as 99%, and can decompose and harmlessly treat the toxins released by bacteria or fungi; at the same time, it also has the functions of deodorization and antifouling. Comparison between our Production and other traditional air refreshers Category Active charcoal Air freshener Formaldehyde trapping agent Volatile organic compounds Moderate effect No use Only works on formaldehyde Microorganisms Deodor Smell Toxicity No effect No use No use Moderate effect Covers the smell Only works on removing the smell of formaldehyde No smell Artificial smell Smelly Bactericide No use Effective No use Smelly Ultra violet light (Orange) No use Effective No use No smell Oxygen anion Ozone Plant absorption (TiO2) No use Moderate effect Little effect Decoposed and removed No use Effective when concentration is >0.1ppm No use Kills 99% of bacteria Fresh smell but doesn t last long No use Moderate effect Strong deodorant No smell Smelly when concentration is >0.15ppm Smells good No smell Non-toxic Low toxicity Low toxicity Relatively toxic Improper use can cause cancer Non-toxic Long term use can cause cancer Non-toxic Non-toxic

6 Applications: Indoor, in-vehicle disinfection, formaldehyde removal When the nano-sized titanium dioxide ultrafine particles are irradiated with ultraviolet light having a wavelength of 388 nm or less, the inside thereof is excited by the absorption of light energy to generate electron-hole pairs, that is, photogenerated carriers. Then it rapidly migrates to the surface thereof to activate the adsorbed oxygen and Moisture produces active free hydroxyl (.OH) and reactive oxygen (O), and when the contaminants and bacteria adsorb to their surface, chain degradation occurs.

7 Superhydrophilic principle Super-hydrophilic means that water falls on the surface of the material, and the contact angle of the water droplets is less than 10. From the appearance, water does not form water droplets on the surface of the material but water film. In addition, the superhydrophilic material has a much higher affinity with water than with dust. Other dirty affinity, so in the case of rain or water flushing, it will preferentially combine with water, so that water can penetrate under the dirt and separate the dirt from the super-hydrophilic self-cleaning coating. In addition, TiO2 itself has a photocatalytic effect, which can effectively degrade the dirt, and is especially suitable for the glass curtain wall of the building.

8 Superhydrophilic principle Super-hydrophilic means that water falls on the surface of the material, and the contact angle of the water droplets is less than 10. From the appearance, water does not form water droplets on the surface of the material but water film. In addition, the superhydrophilic material has a much higher affinity with water than with dust. Other dirty affinity, so in the case of rain or water flushing, it will preferentially combine with water, so that water can penetrate under the dirt and separate the dirt from the super-hydrophilic selfcleaning coating. In addition, TiO2 itself has a photocatalytic effect, which can effectively degrade the dirt, and is especially suitable for the glass curtain wall of the building. Superhydrophilic θ (Contact angle)<10

9 Features and advantages: 1. This is an environmentally friendly product. It is a waterbased coating with less than 3g/L volatile organic pollutants and no heavy metals. It is non-toxic and harmless. It is safe and reliable for human body. 2. Excellent super-hydrophilic properties: contact angle <3. 3. High dispersion of nanoparticles with an average particle size of 5 nm. 4. High transmittance: over 98% in the visible region. 5. Durable: Hardness is 8H; the nano-film can last up to 20 years after being tempered with glass.

10 Application range: increase the self-cleaning effect of photovoltaic panels Influence of dust on power generation efficiency of PV panels Traditional ways of cleaning PV panels Dust Effect Outcome Dust deposition Transmission rate Dust size Deposition thickness Amount of sunlight received Efficiency

11 Application range: Increase the self-cleaning effect of photovoltaic panels Comparison of PV modules coated with self-cleaning coatings and PV modules without selfcleaning coatings after two months of outdoor Coated PV panel Not coated In conclusion: Coated PV is 5% to 15% more efficient than uncoated PV The coated PV surface does not turn yellow, which proves that the quality life is longer than that of the uncoated PV.

12 Applications: Glass curtain wall (super-hydrophilic properties) Outdoor glass curtain walls need to be cleaned regularly. The traditional cleaning method is usually manual cleaning. It not only consumes a lot of manpower and material resources, but also has great hidden dangers in terms of safety. Without PolyU self-cleaning coating 沒有塗抹了理大自清潔塗料 With PolyU self-cleaning coating 塗抹了理大自清潔塗料

13 Applications: Glass curtain wall (super-hydrophilic properties) Without self-cleaning coating With self-cleaning coating Finger imprint Imprint removed AFTER A DAY OF ILLUMINATION, THE FINGERPRINT OIL IS COMPLETELY DECOMPOSED

14 Our TiO2 coating vs traditional automatic cleaning coating Cost Our TiO2 coating Traditional automatic cleaning coating Less than HKD12/m 2 Less than HKD80-160/m 2 Life-span 20 years 20 years Production method Production process Applications Factory (screen printing) / finished goods (spraying) Simple Solar photovoltaic, glass, aluminum, stainless steel Can only be produced in factory Complicated Glass, aluminum, stainless steel

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