title: Mesoporous, Three-Dimensional Wood Membrane Decorated with Nanoparticles for Highly Efficient Water Treatment.
abstract: Wood, an earth-abundant material, is widely used in our everyday life. With its mesoporous structure, natural wood is comprised of numerous long, partially aligned channels (lumens) as well as nanochannels that stretch along its growth direction. This wood mesostructure is suitable for a range of emerging applications, especially as a membrane/separation material. Here, we report a mesoporous, three-dimensional (3D) wood membrane decorated with palladium nanoparticles (Pd NPs/wood membrane) for efficient wastewater treatment. The 3D Pd NPs/wood membrane possesses the following advantages: (1) the uniformly distributed lignin within the wood mesostructure can effectively reduce Pd(II) ions to Pd NPs; (2) cellulose, with its abundant hydroxyl groups, can immobilize Pd NPs; (3) the partially aligned mesoporous wood channels as well as their inner ingenious microstructures increase the likelihood of wastewater contacting Pd NPs decorating the wood surface; (4) the long, Pd NP-decorated channels facilitate bulk treatment as water flows through the entire mesoporous wood membrane. As a proof of concept, we demonstrated the use and efficiency of a Pd NPs/wood membrane to remove methylene blue (MB, C16H18N3ClS) from a flowing aqueous solution. The turnover frequency of the Pd NPs/wood membrane, ∼2.02 molMB·molPd-1·min-1, is much higher than the values reported in the literature. The water treatment rate of the 3D Pd NPs/wood membrane can reach 1 × 105L·m-2·h-1with a high MB removal efficiency (>99.8%). The 3D mesoporous wood membrane with partially aligned channels exhibits promising results for wastewater treatment and is applicable for an even wider range of separation applications.
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Fengjuan
authors.initials: F
authors.lastname: Chen
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Amy S
authors.initials: AS
authors.lastname: Gong
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Mingwei
authors.initials: M
authors.lastname: Zhu
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Guang
authors.initials: G
authors.lastname: Chen
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Steven D
authors.initials: SD
authors.lastname: Lacey
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Feng
authors.initials: F
authors.lastname: Jiang
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Yongfeng
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Yanbin
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Jiaqi
authors.initials: J
authors.lastname: Dai
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Yonggang
authors.initials: Y
authors.lastname: Yao
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Jianwei
authors.initials: J
authors.lastname: Song
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Boyang
authors.initials: B
authors.lastname: Liu
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Kun
authors.initials: K
authors.lastname: Fu
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Siddhartha
authors.identifier: 0000-0002-1705-721X
authors.initials: S
authors.lastname: Das
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Mechanical Engineering, University of Maryland College Park , College Park, Maryland 20742, United States.
authors.forename: Liangbing
authors.identifier: 0000-0002-9456-9315
authors.initials: L
authors.lastname: Hu
keywords: high efficiency; mesoporous structure; nanoparticles; three-dimensional membrane; water treatment