A brief introduction of nano titanium dioxide

Nanometer titanium dioxide has very important application in solar cells. At present, the development of solar cell, there are two key issues, namely: improve conversion efficiency and reduce cost. Solar cells on the market at present mostly belongs to the silicon solar cell, the manufacturing cost is too high, is not conducive to a wide range of applications. The nanocrystalline titanium dioxide solar cells developed in the ninety s with cheap cost, simple technology and the advantages of stable performance, has become a powerful competitor of traditional solar cells. At present, the nanocrystalline tio2 solar photoelectric efficiency steady at 10%, production costs only 1/5 ~ 1/10 for silicon solar cell, life can reach more than 20 years.

Nano titanium dioxide in the application of self-cleaning glass. Typically, tio2 surface and the water contact Angle is about 72 °, after uv irradiation, the contact Angle under 5 °, even can reach 0 °, i.e., the water droplets can fully infiltrates surface, shows very strong super hydrophilicity, stop light, the surface of the super hydrophilic can maintain a few hours to a week or so, slowly back to the previous state of hydrophobic. With a uv lamp light, and show the super hydrophilic. The intermission ultraviolet light can make the surface always stay super hydrophilicity. Experiments show that the coated titanium dioxide thin film surface has the super hydrophilic, once the surface is the oil pollution, because of its super hydrophilicity, oil is not easy, in the external wind, under the action of water spray momentum and gravity to fall off, the ultraviolet ray in sunshine enough to sustain super hydrophilic surface, making it has the function of long-term self-cleaning decontamination.

Nano titanium dioxide in sterilization. Application of TiO2 by light can generate chemical lively very strong sex to superoxide anion free radicals and hydrogen and oxygen free radicals, when encountered bacteria, can direct attack bacteria cells, causing bacteria of organic matter degradation in cells, to kill bacteria, and decomposition. General common fungicides such as silver, copper can make bacterial cells lose activity, but after killing bacteria, the body releases harmful components such as endotoxin and nano titanium dioxide can not only affect fertility, bacteria and can destroy bacteria cell membrane structure, achieve complete degradation bacteria, prevent secondary pollution caused by endotoxin. Nanometer titanium dioxide belongs to non dissolution material, at the same time of kill and degradation bacteria, its decomposition, dissolution, photocatalytic effect lasting, and have a lasting effect of kill and degradation bacteria.

In addition, the nanometer titanium dioxide in magnetic materials, light-colored conductive materials, gas sensor, humidity sensor and other fields has been very good applications. With the deepening of the application research, its application field will be more and more widely.

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