Photorecovery of nanoparticles from an organic solvent

Langmuir : the ACS Journal of Surfaces and Colloids
Alireza SalabatKevin J Mutch

Abstract

Commercial silica nanoparticles were dispersed in toluene, stabilized by a mixture of sodium bis(2-ethylhexyl)sulfosuccinate (AOT) and a photolyzable anionic surfactant sodium hexylphenylazosulfonate (C6PAS). Selective photolysis of the interfacial C6PAS component induces colloid instability, resulting in flocculation and eventual phase separation of the silica nanoparticles. UV-vis spectroscopy was used to follow the photochemical breakdown of C6PAS; diffusion coefficient measurements by dynamic light scattering were employed to monitor the photoinduced flocculation; and silica contents in the toluene, before and after UV light irradiation, were determined gravimetrically. The results show that light can be used to trigger separation and recovery of nanoparticles stabilized by photolabile interfacial layers.

References

Jan 25, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Julian EastoeSean Davis
Feb 2, 2006·Journal of the American Chemical Society·Ana VesperinasGordon A Bell
Jan 27, 2007·Advances in Colloid and Interface Science·Julian EastoeLaura Hudson
Sep 27, 2007·Chemical Communications : Chem Comm·Ana VesperinasPaul Wyatt
Dec 7, 2007·Journal of Colloid and Interface Science·Alireza SalabatRico F Tabor
Oct 21, 2005·Soft Matter·Julian Eastoe, Ana Vesperinas

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Citations

Dec 8, 2010·Journal of Colloid and Interface Science·Muhammad Faizan NazarJulian Eastoe
Sep 10, 2010·Chemistry : a European Journal·Olesya MyakonkayaJulian Eastoe
Apr 18, 2009·Advances in Colloid and Interface Science·Olesya Myakonkaya, Julian Eastoe
May 14, 2008·Soft Matter·Julian EastoeIsabelle Grillo
Jul 24, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Lucy YeRobert Pelton
Dec 31, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Martin J HollambyIsabelle Grillo
Jun 26, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Azwan Mat LazimJulian Eastoe

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