The document discusses the concept of self-cleaning concrete using titanium dioxide, a photocatalyst that decomposes air pollutants and organic waste, thus preserving the aesthetic value of buildings. It details the preparation of titanium dioxide mixed with silver in various concentrations to enhance its effectiveness. The conclusion highlights the environmental benefits of such coatings, equating their air purifying capabilities to that of 80 trees for every 1000 m2 applied.

1. We humans are beauty lovers. We prefer Beauty to
Purpose..! Many a times it costs more for Architectural
works than the actually building.
Nature has other plans…! May be it got angry on how
we are ruining it and decided to take revenge, using our
mistakes against us..!

2. This is what we are doing to it…

4. The gasses that are being released from factories and
vehicles reacts with the concrete and deteriorates the
outer surface making it lose its Aesthetic appearance.

6. Due to this, a lot of man power, time and a lot of money is
being wasted every year to clean the buildings and restore
their appearance.

7. Instead, what if the buildings can clean
themselves?

9. Self Cleaning Concrete
B.Dinesh Rishi
14071A0104

10. Contents
Introduction
Literature Review
Preparation of TiO2
References
Conclusion

11. Introduction
NOx (NO2, NO3 etc.,) are the main components of the
air pollution that reacts with building surfaces
constantly and stains them.

12. Literature Review
Sun can help us out with this.(Nature Again..!)
Coating the outer surface of concrete(any surface of
course) with Titanium dioxide can make self cleaning
possible.

13. Titanium Dioxide is a Photocatalyst(light acts as
catalyst)
It decomposes NOxwhich are mainly responsible for
staining of buildingsinto component Nitrates which are
harmless to the atmosphere(purifying @same time)

14. It also decomposes both Organic and Inorganic
wastes on the surface and in the surroundings in the
presence of Sun.
This way, the decomposed wastes are ready to get
washed off in rain or even in a water as less as in
morning dew.

16. Preparation of TiO2
Experimentally, it’s found that doped TiO2 is more
efficient in degrading wastes than pure TiO2. So,
Ag(Silver) is added in various concentrations and the
Titanium catalyst is prepared.
Modified titanium catalyst were prepared with two
different concentrations of Ag, 0.2% and 2%.

17. For the preparation of titanium doped catalyst with 0.2% Ag,
0.002 moles of silver was dissolved in 50 ml of distilled water
in porcelain bowel and 0.998 moles of titanium dioxide was
added to the solution. (Mix 1)
For the preparation of titanium doped catalyst with 2% Ag,
0.02 moles of moles silver was dissolved in 50 ml of distilled
water in porcelain bowel and 0.98 moles of titanium dioxide
was added to the solution.(Mix 2)

18. The solutions were stirred well and allowed to settle
for 24 hr., the contents were heated well to evaporate
all the water. The dried solids were first ground and
then calcined at 400oC for 6 hrs. in muffle furnace.

19. Mix 1 is more efficient in preserving the whiteness of
building (useful for works made of White cement)
Mix 2 is more efficient in preserving the colour of the
Building

20. References
1. http://www.arconic.com/aap/europe/en/info_page/ecoclean.asp
2. http://www.citymetric.com/skylines/awhat-exactly-self-cleaning-
concrete-and-how-does-it-work-944
3. Production of self-cleaning cement using modified titanium
dioxide by
1. Jatinder kumar(Assistant Professor, Department Of Chemical Engineering, Dr. B.R. Ambedkar N.I.T,
Jalandhar, India ),
2. Anurag Srivastava(P.G. student, Department of chemical engineering, Dr. B.R. Ambedkar N.I.T,
Jalandhar, India )
3. Ajay Bansal (Associate Professor, department of chemical engineering, Dr. B.R. Ambedkar N.I.T,
Jalandhar, India )

21. Conclusion
The addition of Titanium Dioxide in the outer coating not
only helps self cleaning of any surface but also helps
purifying the air surrounding it. It was experimentally
found that 1000 m2 of this coating can disperse as much
smog that 80 trees can disperse.
In addition to ensuring the beauty it is also purposeful in
cleaning the air surrounding it.