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A photocatalyst is a substance that generates catalyst reaction when receiving light. Titanium dioxide is used the most in making photocatalysts, because it has excellent acid- and alkali- resistance, and it is a harmless and environment-friendly substance that turns various pollutants into harmless substances. Also, Titanium dioxide can offer sterilization, bacterial resistance, and deodorization functions, and decompose organic substances.
Adverse effects of pollutants on the human body
1. Dust, tobacco smoking (including various gases and nicotine)
Dust in the atmosphere enter indoors. Together with this, dust on the floor indoors and cigarette ashes offer causes of silicosis, coniosis, coal-related coniosis, and asbestosis.
2. Combustible gases (CO, NO2, SO2, RSP, etc.)
Gases generated from various stoves (briquette, gas, and petroleum), fireplaces, fuel combustion, and gas ovens, offer causes of chronic lung diseases, enhanced airway resistance, and adverse effects on the central nerve.
3. Radon, formaldehyde, VOCs, ammonia, and asbestos
These are generated from various plywoods, boards, furniture, and thermal insulators in new housings and living environment, as well as from deodorants, tobacco smoking, cosmetics, clothing paints, adhesives, sprays, combustions, laundries, clothes, aromatics, construction materials, waxes and other volatile organic compounds. These substances thus irritate the eye, nose, and throat, as well as offer causes of coughing, diarrhea, vomiting, giddiness, skin diseases, nasitis, and emotional disturbance, loss of memory, dizziness, and headache.
4.
Microorganisms (molds, bacteria, viruses, and pollens)
These offer causes of allergic diseases and respiratory diseases through humidifiers, cooling systems, refrigerators, pets, vermin, and human beings.
5. Offensive odors
Indoor intrusion of outdoor offensive odors and inhaling of cigarette smoking.
Reduced appetite, vomiting, allergies, and psychoneuroses.
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- Use of new material air catalyst and photocatalyst.
