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Self-propelled Activated Carbon Janus Micromotors for Efficient Water Purification

Self-propelled Activated Carbon Janus Micromotors for Efficient Water Purification

Beatriz Jurado-Sánchez, Sirilak Sattayasamitsathit, Wei Gao, Luis Santos, Yuri Fedorak, Virendra V Singh, Jahir Orozco, Michael Galarnyk, Joseph Wang

Small. 2015 Jan 27;11(4):499-506.

PMID: 25207503

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS72342	Platinum on activated charcoal			Price

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