AP Seminar - Latest Developments with Layered Double Hydroxides
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Date
23 May 2025
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Organiser
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Time
15:00 - 16:00
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Venue
FJ301, 3/F, Wing FJ, PolyU Map
Speaker
Prof. Dermot O’Hare
Summary
Layered double hydroxides (LDHs) are a highly tunable class of inorganic materials with the general formula [M(1–x)M’x(OH)2]a+ [A–a/n] where M and M’ are most commonly divalent and trivalent metal cations, An– is an anion and 0 < x < 1. The metal hydroxides form a positively charged brucite-like layers, with the intercalated anions providing charge balance. However, agglomeration of the LDH platelets leads to low surface area dense “stone-like” agglomerates which limits their use in many applications.
We have developed both solvent dispersion and core@shell approaches to avoid the agglomeration of the LDH platelets. For example, our Aqueous Miscible Organic Solvent Treatment (AMOST) process can create highly dispersed LDH-based materials consisting of nanosheet dispersions. This process produces exposed active sites with high surface areas and porosity. It is now possible to tailor these materials to a wide range of novel applications such as solid CO2 sorbents1 and heterogeneous catalysis.2,3,4,5
References
- X. Zhu, M. Lyu, T. Ge, J. Wu, C. Chen, F. Yang, D. O’Hare, R. Wang, Cell Reports, Physical Science, 2021, 2, 100484.
- M. Zhao, L. Huang, Y. Gao, Z. Wang, S. Liang, X. Zhu, Q. Wang, H. He, D. O'Hare, Nano-Micro Letters., 2025 17, 170.
- M. M.-J. Li, C. Chen, T. Ayvali, H. Suo, J. Zheng, I. F. Teixera, L. Ye, H. Zou, D. O’Hare and S. C. E. Tsang, ACS Catal., 2018, 8, 4390-4401.
- M. Lyu, J. Zheng, C. Coulthard, R. Jing, Y. Zhao, S.C.E. Tsang, C. Chen, and D. O’Hare, Chem. Sci., 2023, 14, 9814 - 9819.
- P. Kenyon, D.W.J. Leung, Z.R. Turner, J.-C. Buffet, D. O'Hare, Macromolecules, 2022, 55, 3408-3414.
Keynote Speaker
Prof. Dermot O’Hare
Professor of Organometallic and Materials Chemistry
Department of Chemistry
University of Oxford
Dermot O’Hare was born in Newry, Co Down, He studied at Balliol College, Oxford University, where he obtained his BA, MA and his D.Phil degree under the direction of Professor M.L.H Green FRS. In 1990 he was appointed to a permanent University position and a Septcentenary Tutorial Fellowship at Balliol College. Dermot is currently University Research Professor of Organometallic and Materials Chemistry. In addition, he is currently the Director of the SCG-Oxford Centre of Excellence for Chemistry and Associate Head for Research, Business & Innovation in the Physical and Life Sciences at Oxford. He has been awarded numerous awards and prizes for his creative and ground-breaking work in Inorganic Chemistry, including the Royal Society Chemistry’s Sir Edward Frankland Fellowship, Ludwig Mond Prize, Tilden Medal, Academia–Industry Prize and the Exxon European Chemical and Engineering Prize. He leads a multi-disciplinary research team that works across broad areas of catalysis and nanomaterials. His research is specifically targeted at finding solutions to global issues relating to energy, zero carbon and the circular economy.
