Functionalized TiO2 Nanoparticles for Use for in Situ Anion Immobilization

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• 作者：Shas V. Mattigod ; Glen E. Fryxell ; Kentin Alford ; Tyler Gilmore ; Kent Parker ; Jeff Serne ; and Mark Engelhard
• 刊名：Environmental Science & Technology
• 出版年：2005
• 出版时间：September 15, 2005
• 年：2005
• 卷：39
• 期：18
• 页码：7306 - 7310
• 全文大小：135K
• 年卷期：v.39,no.18(September 15, 2005)
• ISSN：1520-5851

文摘

Anatase particles (40-60 nm) were coated with anorganosilane monolayer terminated with an ethylenediamine(EDA) ligand. These functionalized nanoparticles (FNPs)were then treated with an aqueous solution of Cu(II) tocreate a cationic Cu-EDA complex bound to the nanoparticlesurface. Cu(II) and EDA ligand incorporation wereconfirmed by X-ray photoelectron spectroscopy (XPS)analysis. The Cu(EDA)₂ FNP was then studied for its bindingaffinity for pertechnetate anion from a Hanford groundwatermatrix. The Cu(EDA)₂ FNP was also evaluated for itsinjectability into a porous medium for possible applicationas a subsurface semipermeable reactive barrier. Injectionwas readily accomplished, and resulted in a highly uniformdistribution of the FNP sorbent in the test column.