Synthesis and characterisation of aqueous miscible organic-layered double hydroxides

Journal article

We report the synthesis and characterisation of a new family of layered double hydroxides entitled Aqueous Miscible Organic Layered Double Hydroxide (AMO-LDH). AMO-LDHs have the chemical composition [Mz+1-xM′y+x(OH)2] a+(Xn-)a/r·bH2O·c(AMO- solvent) wherein M and M′ are metal cations, z = 1 or 2; y = 3 or 4, 0 < x < 1, b = 0-10, c = 0-10, X is an anion, r is 1-3 and a = z(1 - x) + xy - 2. The role of the AMO-solvents such as acetone (A) or methanol (M) in the LDH synthesis is discussed. The distinguishing features between AMO, and conventional or commercial LDHs are investigated using X-ray diffraction, infrared spectroscopy, electron microscopy, thermal analysis, adsorption and powder density studies. These experiments show that AMO-LDHs are highly dispersed and exhibit significantly higher surface areas and lower powder densities than conventional or commercially available LDHs. AMO-LDHs can exhibit N2 BET surface areas in excess of 301 m2 g-1 compared to 13 m2 g-1 for the equivalent LDHs prepared by co-precipitation in water. The Zn2Al-borate LDH exhibits a pore volume of 2.15 cm3 g-1 which is 2534 times higher than the equivalent conventionally prepared LDH. © the Partner Organisations 2014.

Authors: Chen, C; Yang, M; Wang, Q; Buffet, J; O'Hare, D

• Publication status: Published
• Publisher: Royal Society of Chemistry
• Journal: JOURNAL OF MATERIALS CHEMISTRY A
• Volume: 2
• Issue: 36
• Pages: 15102-15110
• Publication date: 2014-09-28
• DOI: 10.1039/c4ta02277g
• EISSN: 2050-7496
• ISSN: 2050-7488
• Language: English