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Graphyne and graphene approaches to better desalination

RATE THIS! +61
Posted in Science on 11th Sep, 2013 04:06 AM by AlexMuller
Rapid population growth as well as the agriculture, industry and pollution that goes with it has put huge pressure on our planet’s freshwater resources. Fresh drinking water is a luxury in many parts of the world.
 
One of the most promising solutions to this problem is desalination–the removal of salts from seawater to produce fresh water. This has never been widely used because it is hugely energy intensive and inefficient.
 
Conventional desalination plants that rely on reverse osmosis require a massive 1.5 kiloWatt-hours of electricity to produce 1 tonne of freshwater. Clearly a better approach is needed.
 
Today, Wanlin Guo and friends at Nanjing University of Aeronautics and Astronautics in China say they have identified just such a better way. The new technique involves a material known as graphyne, a two-dimensional sheet of carbon atoms connected together much like graphene but with an altered structure because of double and triple bonds in certain places.
 
Graphyne is interesting because these double and triple bonds create holes between the carbon atoms that are large enough for water molecules to pass through. However, these holes are not big enough for sodium and chloride ions, which are larger because they attract a shell of water molecules since they are charged.
 
Graphyne can form in several configurations known as α-graphyne, β-graphyne, graphyne-3 and so on. Wanlin and co have created a computer simulation of the way that these membranes allow water molecules to pass through while sieving the various types of ions found in seawater.
 
Their conclusions are promising. They say that while water molecules can move freely back and forth through the holes in graphyne, none of the ions they simulated could pass through at all.

 



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Comments

Author: Guest
Posted: 2013-09-11
+6
Congratulations to Wanlin Guo and friends at Nanjing University of Aeronautics and Astronautics in China, for the design on this project. Now what I say is to build it and test it and then tell us if this thing works or not and then I will definitely say congratulations again. Reply
Author: Guest
Posted: 2013-09-11
+7
Apparently the answer to more drinking water is desalination–the removal of salts from seawater to produce fresh water. Reply
Author: Guest
Posted: 2013-09-11
+6
The final answer that the scientists are working on is exactly how to do the desalination of the water. This new development might just do the trick. Reply
Author: Guest
Posted: 2013-09-12
+0
d72kxA Thanks-a-mundo for the article.Much thanks again. Really Cool. Reply
Author: Guest
Posted: 2013-09-13
+0
PmJN2N wow, awesome blog article.Much thanks again. Great. Reply
Author: Guest
Posted: 2013-09-13
+0
69yGfP Major thanks for the blog post. Great. Reply
Author: Guest
Posted: 2013-09-13
+0
w52o0P Really enjoyed this blog post.Really thank you! Will read on... Reply
Author: Guest
Posted: 2013-09-13
+0
VcSJkm I appreciate you sharing this post.Much thanks again. Really Cool. Reply
Author: Guest
Posted: 2013-09-24
+0
VlhIMf Im thankful for the article. Awesome. Reply
Author: Guest
Posted: 2013-09-24
+0
8O7uo7 Hey, thanks for the blog article.Thanks Again. Want more. Reply
Author: Guest
Posted: 2013-10-27
+0
YQMsDE I cannot thank you enough for the post.Much thanks again. Really Cool. Reply
Author: Guest
Posted: 2013-11-02
+0
aA7JEy Im thankful for the blog. Great. Reply


 

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