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10nm nano titanium dioxide for photocatalyst
Product indicators:
This anatase-type nano-TiO2 photocatalyst is a nontoxic white powder, with strong photocatalytic redox effect and high chemical stability. Under the effect of ultraviolet light, sunlight or fluorescent light, the electrons (e¯) are excited from the valence band to the conduction band to yield holes (h+) in the valence band. Then, the h+ and e¯ react with H2O and O2 on the surface of nano-TiO2 to generate highly active OH¯, O2¯ and OOH¯.
The highly-oxidizing superoxide anion radicals,hydroxyl radicals and superoxide hydroxyl radicals can oxidize and decompose harmful organic pollutants such as formaldehyde, benzene, toluene, dimethylbenzene, ammonia and TVOC, odors and bacteria into harmless CO2 and H2O. Nano-TiO2 photocatalyst is an environmentally-friendly with strong sterilizing, pollutant-removing and self-cleaning effects and good affinity for water, free from secondary pollution.
Product Standards
Appearance…………………………………White Powder
Nano-TiO2 Content…………………………………..≥90%
Crystal Form…………………………………… Anatase
Mean Particle Diameter…………………………… ≤20nm
PH Value……………………………………….Weak Acid
Photocatalytic Efficiency…………………………… ≥60%
Moisture……………………………………………….≤1%
Product Properties
Nano-TiO2 photocatalyst is a white powder, with strong photocatalytic redox effect and high
chemical stability. Under the effect of visible or ultraviolet light, it can oxidize and fully decompose harmful organic pollutants such as formaldehyde, benzene, toluene, dimethylbenzene, ammonia and TVOC, odors, bacteria, viruses and microorganisms into harmless CO2 and H2O. In addition, it has good water affinity and self-cleaning properties and does not cause secondary pollution.
Application Area
Nano-TiO2 is a good photocatalyst widely used in the fields of air purification, wastewater treatment, paint, cosmetics, plastics, textiles, ceramics, glass, odor removal and sterilization. For instance, it can be used to prevent animal diseases; produce multifunctional fabrics (e.g. anti-UV fabrics, deodorant and antibacterial fabrics, infrared reflection fabrics, waterproof and antifouling fabrics);produce highly pigmenting metallic finish and antirust paint for cars; and produce germ-repellent and air-purifying paint.
Photocatalytic Mechanism of Nano-TiO2
Nano-TiO2 photocatalytic degradation mechanism finishes the photocatalytic process in seven steps:
1. TiO2 + hv→ e¯+ h+
2. h+ + H2O→OH + H+
3. e¯+ O2→OO¯
4. OO¯+H+ →OOH
5. 2OOH → O2 + H2O2
6. OO¯+ e¯+ 2H+ →H2O2
7. H2O2 + e¯→OH + OH¯
8. h+ + OH¯→OH
When a photon with energy hv or with energy greater than the semiconductor energy gap Eg is emitted into the semiconductor, an electron is excited from the valence band (VB) to the conduction band (CB), yielding an highly active electron (e¯) in the CB and a hole (h+) in the VB, and forming a redox system. The interactions between dissolved oxygen and water and between electrons and holes result in highly-active OH¯, O2¯ and OOH¯. The highly-oxidizing free radicals can decompose most of the organic pollutants on the TiO2 surface into CO2 and H2O, and to oxidize or reduce inorganic contaminants to harmless substances.
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nano tio2 photocatalyst powder nano tio2 photocatalyst liquid
Nano tio2 photocatalyst application principle
Nano tio2 photocatalyst application
10nm nano titanium dioxide for photocatalyst