PREVENTION IS ACTION!
Poor indoor air quality and bacteria contamination can have a profound effect on your health, moods, productivity &
enjoyment of your home or place of work. As a consequence, asthmatic attacks, sinus, tuberculosis, skin & eye
allergies are common diseases suffered by Canadians. To make matters worse, we recently had the Severe Acute
Respiratory Syndrome (SARS) disease added to the list and Bird Flu now hard on its heels - what's next? Do you
worry about bringing home those harmful bacteria and viruses, to where your loved ones live? Do you feel dis-
comfort and sick under the influence of polluted air and second-hand smoke? Do you feel helpless when it comes
to protecting you and your loved ones from SARS and other contagious diseases? Are you searching for some
answers?
Overview
Titanium dioxide Photocatalysis is internationally recognized as one of the new sterilization materials, which can kill almost all kinds of bacteria including avian flu and SARS. It has been widely used in places with high sterilization demanding hospitals, institutions, schools etc. Gens Nano Photocatalyst has strong destructive effect on almost all kinds of bacteria under the irradiation of light, which can be maintained for a very long time to decompose bacteria, its body and the exdotoxin. Meanwhile, photocatalyst can wipe out the indoor allergen to reduce the incidence of respiratory diseases. Sterilization Mechanism of Gens Nano Coating Titanium dioxide itself has no toxicity to microbe and cell. It processes sterilization function only after the irradiation of UV light. At the present of light, the very strong oxidizing power of titanium dioxide can destroy bacteria’s cell wall and membrane, and react with cell component, which inhibits bacteria’s activity and ultimately results in the death and decomposition of bacteria. The sterilization of TiO2 photocatalys t presents the following 2 different biochemical mechanisms. 1. TiO2 irradiated by light directly reacts with the cells The electron-hole can directly react with cell wall, cell membrane and cell component. In the sterilizing process of microzyme and bacilli, CoA inside cell oxidized to CoA dimer loses its activity, which causes the respiration of the cell to stop and finally results in the death. During this process, the electron shift between the killed cell and TiO2 is passed by CoA. Therefore the content of CoA decreases and CoA dimer increases. 2. Indirect sterilization reaction That electron hole dissolves in water will generate active oxygen such as hydroxyl radical. The electronic structure of titanium dioxide is characterized by filled valence band (VB) and empty conduction band (CB). The band gap energy is excited and an electron is promoted from the valence band (VB) to the conduction band (CB). Then an electron-hole pair is generated (electron e- and hole h+). The positive-hole of titanium dioxide breaks the water molecule apart to form hydrogen gas and hydroxyl radical. The negative-electron reacts with oxygen molecule to form s uper oxide anion (O−2 ·). Super oxide anion can react with water molecule further, which generates hydroxyl radical peroxide (· OOH) and hydrogen peroxide (H2O2). Moreover, active hydroxyl radical can combine to form hydrogen peroxide. This cycle continues when light is available. The active hydroxyl radical, super oxide anion, peroxide hydroxyl radical and hydrogen peroxide can react with biomacromolecule such as protein enzyme and lipid, which will destroy the cell structure. They react with cell wall, membrane and its component. For example, the oxidation – reduction material is necessary in the formation of adenosine triphosphate inside the hela cell. |
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Contact: PERMAWELD PVT LTD
www.permaweld.com |
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