A
Alexander Knebel
Researcher at Leibniz University of Hanover
Publications - 31
Citations - 2157
Alexander Knebel is an academic researcher from Leibniz University of Hanover. The author has contributed to research in topics: Membrane & Gas separation. The author has an hindex of 13, co-authored 25 publications receiving 1287 citations. Previous affiliations of Alexander Knebel include King Abdullah University of Science and Technology & Karlsruhe Institute of Technology.
Papers
More filters
Journal ArticleDOI
High-Flux Membranes Based on the Covalent Organic Framework COF-LZU1 for Selective Dye Separation by Nanofiltration.
TL;DR: The continuous two-dimensional imine-linked COF-LZU1 membrane with a thickness of only 400 nm was prepared on alumina tubes by in-situ solvothermal synthesis and shows excellent water permeance and outstanding water stability, rendering it an interesting system for water purification.
Journal ArticleDOI
Covalent Organic Framework–Covalent Organic Framework Bilayer Membranes for Highly Selective Gas Separation
Hongwei Fan,Hongwei Fan,Alexander Mundstock,Armin Feldhoff,Alexander Knebel,Jiahui Gu,Hong Meng,Jürgen Caro +7 more
TL;DR: A new type of a two-dimensional layered-stacking COF-COF composite membrane in bilayer geometry synthesized on a porous support by successively regulating the growth of imine-based COf-LZU1 and azine- based ACOF-1 layers via a temperature-swing solvothermal approach is demonstrated.
Journal ArticleDOI
Defibrillation of soft porous metal-organic frameworks with electric fields
Alexander Knebel,Benjamin Geppert,Kai Volgmann,Daniil I. Kolokolov,Daniil I. Kolokolov,Alexander G. Stepanov,Alexander G. Stepanov,Jens Twiefel,Paul Heitjans,Dirk Volkmer,Jürgen Caro +10 more
TL;DR: Permeation measurements under a direct-current E-field poling of 500 volts per millimeter showed reversibly controlled switching of the ZIF-8 into polar polymorphs, which was confirmed by x-ray diffraction and ab initio calculations, and a defibrillation of the different lattice motions.
Journal ArticleDOI
Tunable molecular separation by nanoporous membranes
Zhengbang Wang,Alexander Knebel,Sylvain Grosjean,Danny Wagner,Stefan Bräse,Christof Wöll,Jürgen Caro,Lars Heinke +7 more
TL;DR: In this article, the authors present a linker containing photoresponsive azobenzene-side-groups into monolithic, crystalline membranes of metal-organic frameworks, which can be switched from the trans to the cis configuration by irradiation with ultraviolet or visible light, resulting in a substantial modification of the membrane permeability and separation factor.
Journal ArticleDOI
Solution processable metal-organic frameworks for mixed matrix membranes using porous liquids.
Alexander Knebel,Alexander Knebel,Anastasiya Bavykina,Shuvo Jit Datta,Lion Sundermann,Luis Garzón-Tovar,Yury Lebedev,Sara Durini,Rafia Ahmad,Sergey M. Kozlov,Genrikh Shterk,Madhavan Karunakaran,Ionela Daniela Carja,Dino Simic,Irina Weilert,Manfred Klüppel,Ulrich Giese,Luigi Cavallo,Magnus Rueping,Mohamed Eddaoudi,Jürgen Caro,Jürgen Caro,Jorge Gascon +22 more
TL;DR: It is demonstrated that metal–organic frameworks, a type of highly crystalline porous solid, can be made solution processable via outer surface functionalization using N-heterocyclic carbene ligands, and a surface modification is reported that allows porous liquid formation and so synthesis of highly loaded and mechanically robust mixed matrix membranes.