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US 10,245,558 B2Granted
Green synthesis nanocomposite membranes
AssigneesUniversity of Kentucky Research Foundation, U.S. Environmental Protection Agency
InventorsDibakar Bhattacharyya, Vasile Smuleac, Rajender S. Varma, Subhas K. Sikdar
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Abstract
A nanocomposite membrane includes a macroporous polymer membrane having a plurality of pores. A plurality of metal nanoparticles are synthesized and immobilized within those plurality of pores. The nanoparticles are reduced and capped with a green reducing and capping agent such as green tea extract.
Claims20
An apparatus, comprising:
- a macroporous polymer membrane including a plurality of polyacrylic acid (PAA)-functionalized pores and
- a plurality of green capped and reduced metal nanoparticles entrapped and immobilized in situ by functionalized polyacrylic acid of said plurality of PAA-functionalized pores, said plurality of green capped and reduced metal nanoparticles comprising catalytically active iron oxide nanoparticles.
An apparatus, comprising:
- a macroporous polymer membrane including a plurality of polyacrylic acid (PAA)-functionalized pores;
- and
- a plurality of reduced and green capped iron oxide nanoparticles entrapped and immobilized in situ by functionalized polyacrylic acid within said plurality of PAA-functionalized pores, said plurality of reduced and green capped iron oxide nanoparticles reduced and capped in situ with a green reducing and capping agent;
- said apparatus being made by directly synthesizing and immobilizing said plurality of reduced and green capped iron oxide nanoparticles in-situ in said plurality of PAA-functionalized pores using said green reducing and capping agent while operating in diffusion mode.
1 more element
A method of preparing a nanocomposite membrane, comprising:
- functionalizing pores of a macroporous polymer membrane with polyacrylic acid (PAA);
- passing a first metal salt solution and a first reducing solution through the PAA functionalized pores by diffusion or convection, thereby synthesizing, entrapping and immobilizing a plurality of metal nanoparticles in-situ within functionalized polyacrylic acid of the PAA functionalized pores;
- passing a second metal salt solution and a second reducing solution through the PAA functionalized pores by diffusion or convection to deposit a second metal on the plurality of metal nanoparticles, thereby forming a plurality of iron oxide nanoparticles;
- and
- using a green reducing and capping agent to cap the iron oxide nanoparticles.
2 more elements
Dependencies are inferred from the claim text.