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Environmental nanotechnology

Presented By :- Sumer Pankaj

Roll no. :- 195(T.Y.E.S.)8/17/2015

Environmental Nanotechnology

Presented by :- Sumer pankaj

Roll no. :- 195( T.Y.E.S. )

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Introduction Product characteristics Physical properties Chemical properties Tools used in nanotechnology Applications Case study Negative impacts on nanotechnology

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Content

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Introduction Nanotechnology :- It is the

controlled manipulation of matter on a atomic, molecular and supramolecular scale.

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Nanotechnology deals with the development and use of materials or devices ranging between 1 to100 nanometer. This range is known as nanoscale.

All the materials that fall under this scale are nanoparticals or nanocrystals.

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Product characteristics High surface area. High activity. Catalytic activities. Adsorbent. Natural and synthetic. Wide range of applications. Prone to form agglomerate.

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Physical properties Shape, size, specific surface area, and ratio of width and height.

They get stick together.

Have smooth or bumpy surface

They can dissolve easily8/17/2015

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Chemical properties Molecular structure

Composition, including purity and impurities

It can held in solid, liquid or gas

Surface chemistry

Attraction of water molecules or oils and fats

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Tools used in nanotechnology

Transmission electron microscope

Atomic force microscope

Scanning tunneling microscope

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Applications of some nanoparticals in general

Space shuttles Medicines Food Fuel cells and batteries Sports goods

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Applications of nanoparticals in the field of environment

Reducing pollution byproducts

Development of solar cells

Making of wind-mill blades

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Cleaning of organic solvents which pollute ground water

Development of the hydrogen fuel cars

Capturing CO2 in power plant exhausts

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MATERIAL NANOMATERIAL USES

1. Concrete Carbon nanotubes

SiO2

Fe2O3

Sufficient reinforcement

Fraction prevention

2. Steel Copper nanoparticals

Improve weld quality

Improve oxidation resistance

CASE STUDYTABLE 1: Application area of nanotechnology for quality

improvements in building resource :-

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MATERIAL NANOMATERIAL USES

3. Windows TiO2

SiO2

Self-cleaning ability

Anti-fogging

Prevent heat and ultraviolet

infiltration

Resistance against fire

4. Tins/coating TiO2

Silver Nanoparticles

Anti-dirt

Bactria and bug killing ability

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SR NO MATERIAL NANOMATERIAL USES5. Solar cells cover shade/ TiO2

Carbon nanotubes and C60

CdSe quantum dots

More efficient application of solar energy

6. Cement Carbon nanotubes

Polypropylenenanofibers

Improve strength

Resistance against fire

7. Sensors Carbon nanotubes On time structure safety

evaluation

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Negative impacts of nanotechnology to environment

If released in the environment then it is difficult to identify its amount in the atmosphere.

It can cause effects to human health and plants.

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References http://www.nano.gov/nanotech-101/w

hat/definition http://snf.stanford.edu/Education/Nan

otechnology.SNF.web.pdf http://www.nanoscience.gatech.edu/zl

wang/research/afm.html http://www.understandingnano.com/n

anotech-applications.html http://www.futurenanotechnology.net/ https://www.nano.gov/sites/default/file

s/pub_resource/nanotechnology_bigthingsfromatinyworld-print.pdf

http://www.nobelprize.org/educational/physics/microscopes/tem/

https://www.aiha.org/aihce07/handouts/rt201krause.pdf

http://www.nanowerk.com/nanotechnology/introduction/introduction_to_nanotechnology_1.php

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“Nanotechnology is a curse or a blessing to human civilization, all depends on how we manage it.”

- T. wang.

Thank you8/17/2015