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Photocatalytic performance of fabric coated with nano TiO2

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Published on Oct 24, 2008

This experiment proves the outstanding photocatalytic activity of our product: fabric coated nano TiO2.

Transcript:

This experiment proves the high photocatalytic activity of our product: nano crystalline titanium dioxide coated onto fabric.

In the experiment, we used a piece of fabric coated with nano titanium dioxide, methylene blue solution, pH indicator paper , lemon, and distilled water.

First, put the piece of fabric coated with nano titanium dioxide into the flask.

Pour some distilled water in it

Then, soak and stir the flask, so that the fabric is totally wet.

Decant water into the petri-dish

Put a piece of PH indicator paper into the water. We can see that its color is not changed.

Squeeze lemon juice into the petridish.

Color of the indicator changes to orange as a result of acid in lemon juice.

This shows that the fabric coated with titanium dioxide is chemically neutral.

Now is main stage of the experiment

Pour methylene blue on to the fabric

Stir the solution so that the reaction occur quickly

Decant treated solution into the petridish

We can see that obtained solution is totally transparent. This means that methylene blue is degraded quickly and completely.

Now lets repeat the procedure with the same fabric.

This time, once again, methylene blue is totally decomposed.

Now, The same procedure is repeated for the third time.

Methylene blue is still completely degraded

Note that the entire experiment is taken place under indoor light.

The result shows that our product has strong photocatalytic activity.

Further experiment on decomposing virus and has also been carried out by using PCR technique. The result showed that our product can destroy 100% of virus at 10^6 PFU and bacteria at 1.5x10^9 CFU within 30 minutes under room light. Besides, the product is also highly effective in decomposing 2.4D, phenol and precipitating As in water.

Both of production of high effective nano material and coating it on fabric were carried out by using simple technology, suitable for scaling up at industrial level. The nano TiO2-coating fabric can be used to make protection cloths, antiviral masks, and filters to purify air or water from bio-chemical pollutants.


We are seeking collaboration with any companies or institutions for technology transfer or mass production. For detail information, please email: nhopv@vnu.edu.vn

Thank you.

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