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Self-Propelled Activated Carbon Janus Micromotors for Efficient Water Purification

Jurado-Sánchez, Beatriz and Sattayasamitsathit, Sirilak and Gao, Wei and Santos, Luis and Fedorak, Yuri and Singh, Virendra V. and Orozco, Jahir and Galarnyk, Michael and Wang, Joseph (2015) Self-Propelled Activated Carbon Janus Micromotors for Efficient Water Purification. Small, 11 (4). pp. 499-506. ISSN 1613-6810. http://resolver.caltech.edu/CaltechAUTHORS:20180122-111309765

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Abstract

Self-propelled activated carbon-based Janus particle micromotors that display efficient locomotion in environmental matrices and offer effective ‘on-the-fly’ removal of wide range of organic and inorganic pollutants are described. The new bubble-propelled activated carbon Janus micromotors rely on the asymmetric deposition of a catalytic Pt patch on the surface of activated carbon microspheres. The rough surface of the activated carbon microsphere substrate results in a microporous Pt structure to provide a highly catalytic layer, which leads to an effective bubble evolution and propulsion at remarkable speeds of over 500 μm/s. Such coupling of the high adsorption capacity of carbon nanoadsorbents with the rapid movement of these catalytic Janus micromotors, along with the corresponding fluid dynamics and mixing, results in a highly efficient moving adsorption platform and a greatly accelerated water purification. The adsorption kinetics and adsorption isotherms have been investigated. The remarkable decontamination efficiency of self-propelled activated carbon-based Janus micromotors is illustrated towards the rapid removal of heavy metals, nitroaromatic explosives, organophosphorous nerve agents and azo-dye compounds, indicating considerable promise for diverse environmental, defense, and public health applications.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/smll.201402215DOIArticle
http://onlinelibrary.wiley.com/wol1/doi/10.1002/smll.201402215/abstractPublisherArticle
http://onlinelibrary.wiley.com/wol1/doi/10.1002/smll.201402215/suppinfoPublisherSupporting Information
Additional Information:© 2014 Wiley. Received: July 24, 2014. Revised: August 15, 2014. Published online: September 10, 2014. This project received support from the Defense Threat Reduction Agency-Joint Science and Technology Office for Chemical and Biological Defense (Grant no. HDTRA1–13–1–0002). B. J-S acknowledges support from the People Programme (Marie Curie Actions) of the EU 7th Framework Programme (FP7 2007–2013) under REA Grant PIOF-GA-2012–326476. W. G. is a HHMI International Student Research fellow.
Funders:
Funding AgencyGrant Number
Defense Threat Reduction Agency (DTRA)HDTRA1–13–1–0002
Marie Curie FellowshipPIOF-GA-2012–326476
Howard Hughes Medical Institute (HHMI)UNSPECIFIED
Record Number:CaltechAUTHORS:20180122-111309765
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180122-111309765
Official Citation:Jurado-Sánchez, B., Sattayasamitsathit, S., Gao, W., Santos, L., Fedorak, Y., Singh, V. V., Orozco, J., Galarnyk, M. and Wang, J. (2015), Self-Propelled Activated Carbon Janus Micromotors for Efficient Water Purification. Small, 11: 499–506. doi: 10.1002/smll.201402215
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84454
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:23 Jan 2018 13:58
Last Modified:31 Jan 2018 00:29

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