title: Dynamic graphene filters for selective gas-water-oil separation.
abstract: Selective filtration of gas, water, and liquid or gaseous oil is essential to prevent possible environmental pollution and machine/facility malfunction in oil-based industries. Novel materials and structures able to selectively and efficiently filter liquid and vapor in various types of solutions are therefore in continuous demand. Here, we investigate selective gas-water-oil filtration using three-dimensional graphene structures. The proposed approach is based on the adjustable wettability of three-dimensional graphene foams. Three such structures are developed in this study; the first allows gas, oil, and water to pass, the second blocks water only, and the third is exclusively permeable to gas. In addition, the ability of three-dimensional graphene structures with a self-assembled monolayer to selectively filter oil is demonstrated. This methodology has numerous potential practical applications as gas, water, and/or oil filtration is an essential component of many industries.
authors.affiliation: Department of Physics, Kyonggi University, Suwon, Gyeonggi-Do 443-760, Republic of Korea.
authors.forename: Jihye
authors.initials: J
authors.lastname: Bong
authors.affiliation: Department of Physics, Kyonggi University, Suwon, Gyeonggi-Do 443-760, Republic of Korea.
authors.forename: Taekyung
authors.initials: T
authors.lastname: Lim
authors.affiliation: Department of Physics, Kyonggi University, Suwon, Gyeonggi-Do 443-760, Republic of Korea.
authors.forename: Keumyoung
authors.initials: K
authors.lastname: Seo
authors.affiliation: School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan 689-798, Republic of Korea.
authors.forename: Cho-Ah
authors.initials: CA
authors.lastname: Kwon
authors.affiliation: School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan 689-798, Republic of Korea.
authors.forename: Ju Hyun
authors.initials: JH
authors.lastname: Park
authors.affiliation: School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan 689-798, Republic of Korea.
authors.forename: Sang Kyu
authors.initials: SK
authors.lastname: Kwak
authors.affiliation: Department of Physics, Kyonggi University, Suwon, Gyeonggi-Do 443-760, Republic of Korea.
authors.forename: Sanghyun
authors.initials: S
authors.lastname: Ju