Nanostructured Graphene Oxide Composite Membranes with Ultrapermeability and Mechanical Robustness.

Xue, Shuangmei; Ji, Chenhao; Kowal, Matthew D; Molas, Jenna C; Lin, Cheng-Wei; McVerry, Brian T; Turner, Christopher L; Mak, Wai H; Anderson, Mackenzie; Muni, Mit; Hoek, Eric M V; Xu, Zhen-Liang; Kaner, Richard B

Xue, Shuangmei; Ji, Chenhao; Kowal, Matthew D; Molas, Jenna C; Lin, Cheng-Wei; McVerry, Brian T; Turner, Christopher L; Mak, Wai H; Anderson, Mackenzie; Muni, Mit; Hoek, Eric M V; Xu, Zhen-Liang; Kaner, Richard B.

Afiliación

Xue S; Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States.
Ji C; State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China.
Kowal MD; Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States.
Molas JC; State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, P. R. China.
Lin CW; Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States.
McVerry BT; Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States.
Turner CL; Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States.
Mak WH; Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States.
Anderson M; Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States.
Muni M; Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States.
Hoek EMV; Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States.
Xu ZL; Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States.
Kaner RB; Department of Civil and Environmental Engineering, Institute of the Environment & Sustainability and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States.

Nano Lett ; 20(4): 2209-2218, 2020 Apr 08.

Article en En | MEDLINE | ID: mdl-32058724

RESUMEN

Graphene oxide (GO) membranes have great potential for separation applications due to their low-friction water permeation combined with unique molecular sieving ability. However, the practical use of deposited GO membranes is limited by the inferior mechanical robustness of the membrane composite structure derived from conventional deposition methods. Here, we report a nanostructured GO membrane that possesses great permeability and mechanical robustness. This composite membrane consists of an ultrathin selective GO nanofilm (as low as 32 nm thick) and a postsynthesized macroporous support layer that exhibits excellent stability in water and under practical permeability testing. By utilizing thin-film lift off (T-FLO) to fabricate membranes with precise optimizations in both selective and support layers, unprecedented water permeability (47 L·m-2·hr-1·bar-1) and high retention (>98% of solutes with hydrated radii larger than 4.9 Å) were obtained.

Palabras clave

graphene oxide; mechanical robustness; membrane separation; molecular sieving; nanostructure; thin-film composite

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