CARBON NANOTUBE PONYTAILS
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United States of America Patent
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Issued Date -
Nov 12, 2015
app pub date -
May 11, 2015
filing date -
May 9, 2014
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Abstract
Carbon nanotubes (CNTs) are promising nanomaterials that have the potential to revolutionize water and waste treatment practices in the future. The direct use of unbounded CNTs, however, poses health risks to humans and ecosystems because they are difficult to separate from treated water. Here, we report the design and synthesis of carbon nanotube ponytails (CNPs) by integrating CNTs into micrometer-sized particles, which greatly improves the effectiveness of post-treatment separation using gravitational sedimentation, magnetic attraction, and membrane filtration. We further demonstrate that CNPs can effectively perform major treatment tasks, including adsorption, disinfection, and catalysis. Using model contaminants, such as methylene blue, Escherichia coli, and p-nitrophenol, we show that all the surfaces of individual CNTs in CNPs are accessible during water treatment. Hierarchical structures containing CNPs can be employed in a multitude of nano-material engineering applications, such as water and waste treatment.
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