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Description
Title: | Molybdenum disulfide nanoporous membranes for water desalination |
Author(s): | Heiranian, Mohammad |
Advisor(s): | Aluru, Narayana R. |
Department / Program: | Mechanical Sci & Engineering |
Discipline: | Theoretical & Applied Mechanics |
Degree Granting Institution: | University of Illinois at Urbana-Champaign |
Degree: | M.S. |
Genre: | Thesis |
Subject(s): | Water Desalination
Single-Layer MoS2 Nanopores Graphene Hourglass nanopore Nanofluidics Transition Metal Dichalcogenide |
Abstract: | We demonstrate molybdenum disulfide (MoS2) as a nano porous membrane for water desalination. By performing extensive molecular dynamics simulations, we find that a nanopore in a single-layer MoS2 can effectively reject salt ions and allow transport of water at a high rate. More than 88% of ions are rejected by membranes having pore areas ranging from 20 to 60 A^2. Water flux through the nanoporous MoS2 membrane is found to be 2 to 5 orders of magnitude greater than that of other known nanoporous membranes (MFI-type zeolite, commercial polymeric seawater Reverse Osmosis (RO), brackish RO, Nanofiltration and High-flux RO). Pore chemistry and architecture are shown to play a significant role in modulating the water flux. MoS2 pores with only molybdenum atoms on their edges give rise to higher fluxes which are about 70% greater than that of graphene nanopores. These observations are explained by the permeation coefficients, energy barriers, water density and velocity distributions in the pores. Our findings pave way towards identifying efficient membranes for water desalination. |
Issue Date: | 2016-07-21 |
Type: | Text |
URI: | http://hdl.handle.net/2142/92671 |
Rights Information: | Copyright 2016 Mohammad Heiranian |
Date Available in IDEALS: | 2016-11-10 |
Date Deposited: | 2016-08 |
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Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois