Frequently Asked Questions
1. WHAT IS NANOTECHNOLOGY?
derived from the Greek word for dwarf. 1
nanometer is approximately 100,000 times thinner
than a human hair.
Nanotechnology is a
rapidly growing science of producing and
utilizing nano-sized particles that measure in
nanometers (1 nm = 1 billionth of a meter). The
term nanoparticle is generally used to indicate
particles with dimensions less than 100
nanometers (one nanometer is one billionth of a
meter). For comparison, a human hair is about
100,000 nm in diameter, while a smoke particle
is about 1,000 nm in diameter.
2. WHAT ARE POTENTIAL
For Epidemic (H5N1,
SARS, MRSA) defense
prevention after earthquake, flood, cyclone
public room, home daily anti-bacterial
For use on wood,
marble, granite, metal, paint and concrete
For printing and
For early stage
cleaning of water for household use
For port and sea
3. WHAT IS TITANIUM DIOXIDE
the 9th-most common element on earth and titanium
oxide is used as a white pigment in paint and
cosmetics. As a pigment a lower grade
titanium dioxide is used. For photocatalyst
applications like air-purifying, anti-bacterial
use and self-cleaning purposed a very high-grade
photo reactive titanium dioxide is used. Its
high levels of reaction to light enable it to act
as a catalyst to produce large quantities of
hydroxyl radicals that cause the oxidation of
organic matter, sterilize most bacteria and clear
the air of pollutants. Titanium dioxide can
do this without changing its own structure,
thereby causing it to have an indefinite life
span. Add to this the fact that it is
non-toxic to the environment and humans, it is no
wonder it is being talked about in the same
glowing terms used to describe the future of
plastic when it first came to the
4. ARE NANO-PRODUCTS SAFE?
ARE THEY TOXIC?
Safety of TiO2
as photocatalyst is physically and chemically
safe, the US certified it as a food additive in
1968 and Japan did in 1983. It is now
used widely in making white chocolates and
functional cosmetics, including lipsticks.
The Food Analysis Center of Japan Food Research
Laboratories and Mitsubishi Chemical Safety
Institute Ltd. demonstrated its safety through
skin simulating tests and acute oral toxicity
WHAT IS A PHOTOCATALYST?
defined as "acceleration by the presence of a
catalyst". A catalyst does not change in itself or
being consumed in the chemical reaction. This
definition includes photosensitization, a process
by which a photochemical alteration occurs in one
molecular entity as a result of initial absorption
of radiation by another molecular entity called
Chlorophyll of plants is a type of photocatalyst
called photosynthesis. Photocatalysis is when
chlorophyll captures sunlight to turn water and
carbon dioxide into oxygen and glucose.
Photocatalysis is the creation of a strong
oxidation agent to breakdown any organic matter to
carbon dioxide and water in the presence of the
photocatalyst, light and water.
Photocatalyst & Chlorophyll
6. WHAT ARE VOCs AND WHERE DO
THEY COME FROM?
Volatile Organic Compounds are gases given off by
a number of indoor sources.
one of the most common VOCs. Formaldehyde is a
colorless gas with an unpleasant smell. It is
common in many building materials such as plywood,
particleboard, and glues. Formaldehyde is also
found in furnishings (furniture, drapes and
carpets) and in some types of foam insulation.
Other sources of VOCs and formaldehyde include
burning of fuels: gas, wood, kerosene, and tobacco
products. VOCs also come from personal care
products such as perfumes and hair spray, from
cleaning agents and dry cleaning fluid, paints,
lacquers and varnishes, and from copying and
be released from a product for several years,
though the amounts given off tend to be less as
the product ages and "dries out".
7. WHAT SYMPTOMS DO VOCs CAUSE?
cause irritation of the eyes, nose and throat,
nausea and dizziness, and skin problems. Higher
amounts can cause irritation of the lungs and
wheezing. Higher exposures to formaldehyde may
also cause memory problems and anxiety.
8. WHAT IS OXIDATION?
of combining oxygen with some other substance or a
chemical change in which and atom loses
electrons. The most powerful advanced
oxidation systems are based on the generation of
hydroxyl radicals. They act as very powerful
disinfecting agents by oxidizing cells of
micro-organisms, causing rapture of the cell and
leakage of vital composition.
9. HOW DOES NANO-TiO2 PROTECT AGAINST
BACTERIA AND VIRUSES?
a negative charge while TiO2 coated surface
carries a positive charge. This creates an
"electromagnetic" attraction between the microbe
and treated surface. Once contact is made, the
microbe is oxidized and dies instantly.
WHY IS NANO-TiO2 TREATMENT
is originally water-soluble, it dries quickly
after application and becomes water-insoluble. It
also becomes very hard in ten to fourteen days
after application. It does not come off unless the
surface is polished. Titanium dioxide is merely
the catalyst and is not changed, its effect is
semi-permanent except when walls and ceilings are
WHAT IS ANTI-STATIC?
Dust particle is no longer attracted
to the oily components on the TiO2 treated
WHAT IS HYDROPHILIC?
water loving. When the surface of photocatalytic
film is exposed to light, the contact angle of the
phtocatalyst surface with water is reduced
gradually. After enough exposure to light, the
surface reaches a super-hydrophilic state. In
other words, it does not repel water at all, so
water cannot exist in the shape of a drop, but
spreads flatly on the surface of the substrate.
The water takes the form of a highly uniform thin
film, which behaves optically like a clear sheet
of glass. The hydrophilic nature
of titanium dioxide, coupled with the
gravity, will enable the dust particles to be
swept away following the water stream, thus making
the product self-cleaning.
13. WHERE TO APPLY?
buildings to prevent UV attack. (One of the
property of PHOTOCATALYST is to absorb UV
on external walls will have a self clean
property, that is the wall is not easy to get
walls of entire estate will lower the rate of
transportation of bacteria, virus, mold, etc,
and keep people strong and healthy.
on walls of highway & tunnel lights will
help the decomposition of NO2 & NO3 that
emitted from vehicles.
on garden facilities can lower the possibility
of infections of bacteria & virus by
be sprayed on filters of central air-con to
decompose the bacteria that captured on the
filter, and reduce the bad odor.
decompose those organic VOC gases and so as
formaldehyde from paint & woodwork after
decorations. *Some medical report
indicates that formaldehyde is closely related
to the Children Blood Cancer.
on walls and ceiling can lower the
transmission of bacteria, and so as the bad
also protect masks , toys, telephone, fans,
curtains, toilet, bed, cabinets etc.
We provide photocatalyst surface
coating for long-lasting effects of deodorization,
sterilization, and anti-soiling purposes. Using
regular spray-coating equipments, a fine mist
of photocatalyst can be applied on different types
of surface material that guarantees the maximum