Titanium is environmentally friendly

Titanium is an environmentally friendly metal that is easy to recycle.

Titanium is environmentally friendly

Titanium decomposes dirt (not a lie).

Titanium is 100% recyclable eco metal

Since metallic titanium does not deteriorate semipermanently (for the principle, "Titanium does not rust "), it is easy to recycle, it can be said that it is an environmentally friendly metal per se.

In addition, since titanium itself has a low density and a high specific strength, it can be made small and light, and transportation machines and others can be expected to improve fuel economy. It is ecology.
Let's see from different angles.

The reason for the high price of titanium is that it requires a huge amount of electricity for electrolysis of magnesium chloride generated when refining the titanium ore and because it is necessary to shield the substance used for refining from the atmosphere for batch processing There is no choice but to do so that productivity does not rise because of that.

That means that if you recycle the titanium product that has been refined, you will be able to expect that the electricity will be unnecessary and the price will drop. We can also reduce CO 2 emissions.

However, although recycling is easy, titanium is often used as an alloy by mixing other elements, and it will adversely affect the performance of the finished titanium if it is not strictly separated. In other words, a material that is only known as "titanium" means that it can not be used as a material for pure titanium or a titanium alloy.

In addition, since products that enter the society as products do not deteriorate semipermanently, they can continue to be used forever. In other words, it does not get on the process of recycling because of its lifetime. Therefore, we are currently recycling scraps mostly in the production process of titanium products.

However, recycling titanium does not have to refine accordingly, so there is no doubt that it is extremely ecological. Let's promote recycling of titanium.

Titanium cleans itself

In recent years, it was discovered in Japan that titanium oxide has photocatalytic action and superhydrophilic action.

Photocatalytic action is the action of decomposing organic matter in contact with titanium oxide to a harmless level only by exposure to ultraviolet light to titanium oxide.

The superhydrophilic effect is a phenomenon that when titanium oxide is exposed to ultraviolet light, the wettability to water is greatly improved. On the titanium oxide film which became superhydrophilic state, water spreads as a thin film.

These two actions are really useful for the environment. When ultraviolet rays are applied to titanium oxide, internal electrons become high energy state, and excited electrons (= minus electrification) and holes (= plus charges, so to speak, excluded electrons excited out) can be formed.

This is the same principle as the solar cell, but in solar cells this excited electron is extracted as an electric current to the external circuit, whereas in the photocatalyst excited electrons and holes react with molecules adsorbed on the surface, It causes an oxidation reaction. The characteristic of titanium oxide photocatalyst is that holes generated by light (to be exact, hydroxyl radicals generated by oxidizing water on the titanium oxide surface) are very strong oxidizing power.

Titanium oxide holes have much stronger oxidizing power than hydrogen oxidation and ozone which are usually used strong oxidizing agents. Due to this strong oxidizing power, most substances adsorbed on the surface are broken in their molecular bonds and oxidized and decomposed to their final oxidation products (such as carbon dioxide).
This is photoinduced decomposition reaction. It is effective for sterilization, deodorization, anti-fouling.

On the other hand, excited electrons are thought to reduce oxygen in the air to produce superoxide (· O 2 -), which forms peroxide or becomes hydrogen via hydrogen peroxide. Superoxide anion (anion = negatively charged electrons or atomic groups that receive electrons) is also one of active oxygen, but the oxidizing power is not very strong.

However, since it seems that it does not exert oxidizing action only on what is being touched, caution is necessary when aiming at environmental remediation in a remote place. Still, there are also reports that the number of bacteria in the air in the room has also decreased in the example used for hospital tiles.

At present, a lot of paint and surface treatment using titanium oxide has been developed and put to practical use. With that, you do not need the trouble of cleaning, the extra power = you do not need CO 2 emissions, you can save water, detergent and materials, the merit is immeasurable.

In addition, when ultraviolet rays are irradiated on titanium oxide, photo-induced hydrophilization phenomenon that the wettability of water on the titanium oxide surface becomes remarkably high is also developed.

Titanium oxide is known to partially escape surface oxygen by ultraviolet radiation.
The part from which oxygen has escaped has hydrophilicity, the other part has hydrophobicity, the part of hydrophilicity and hydrophobicity exists in an extremely small size and water spreads through the hydrophilic part , It does not become a round water droplet, it covers the surface.

When the titanium oxide surface gets wet due to rain etc., when it hits ultraviolet rays, water can enter the boundary between dust and oil etc. and titanium oxide surface and float and flow effect can be expected.
This has been put to practical use on the walls of buildings. In addition, water droplets spread thinly without being rounded, so we can expect antifogging effect. It is put to practical use in window glasses and door mirrors of luxury cars.

In addition, attempts are also being made to lower the surface temperature by reducing the surface temperature with the heat of vaporization that flows water on the surface of the building, the water that spreads throughout the wall due to the super-hydrophilizing action evaporates, and reduces the energy used for cooling. Perhaps Titanium may save the earth.

To you who thought that I would like to make it with titanium

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8 merit of titanization

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