Green synthesis of nanometals using plant extracts and use thereof
AssigneesUSA as Represented by the Administrator of U.S. Environmental Protection Agency, VeruTEK, Inc.
InventorsGeorge E. Hoag, John B. Collins, Rajendar S. Varma, Mallikarjuna N. Nadagouda
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Abstract
The present invention relates to methods of making and using and compositions of metal nanoparticles formed by green chemistry synthetic techniques. For example, the present invention relates to metal nanoparticles formed with solutions of plant extracts and use of these metal nanoparticles in removing contaminants from soil and groundwater and other contaminated sites. In some embodiments, the invention comprises methods of making and using compositions of metal nanoparticles formed using green chemistry techniques.
Claims32
A method for making one or more metal nanoparticles, comprising:
- providing a solution comprising a first metal ion;
- providing a plant extract that comprises a reducing agent, a polyphenol, caffeine, and/or a natural solvent or surfactant;
- and
- combining the first metal ion solution and the plant extract to produce metal nanoparticles;
- wherein the metal is selected from the group consisting of iron, manganese, palladium, copper, indium, and combinations.
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A composition comprising zero valent metal nanoparticles and a plant extract or component of the plant extract that comprises a reducing agent, a polyphenol, caffeine, and/or a natural solvent or surfactant wherein the metal nanoparticles comprise one or more of iron, manganese, palladium, copper, indium, and combinations.
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Dependencies are inferred from the claim text.