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A thermodynamically stable layered double hydroxide heterostructure

“…1) was co-produced with [Li-Al-Cl-4-NP]; this is caused by the leaching of Li + ions from the [LiAl 2 (OH) 6 ] + layers at higher temperatures. 26,27 Thermogravimetric analysis was performed on [Li-Al-Cl-4-NP] over the temperature range 20-1200 C. The TGA trace is given in Fig. 2.…”

A Kinetic Study of the Intercalation of Lithium Salts into Al(OH)3

“…The stabilities of the h-LiAl 2 −X materials upon heating in water have been studied previously. − Treatment below 150 °C results in deintercalation of the lithium salts and the production of Al(OH) 3 , whereas reaction above 150 °C produces boehmite (AlOOH) in addition to the solvated salts. The intercalation and deintercalation of LiX is reversible in this system.…”

“…Recent findings have shown that the intercalation−deintercalation cycle has a profound effect on the polydispersity and morphology of the Al(OH) 3 particles, , leading to significant increases in the specific surface area (by a factor of 30−50). In addition, there is commonly a trace sodium content in Al(OH) 3 , which arises from the use of concentrated NaOH solutions in the production method.…”

A time resolved, in-situ X-ray diffraction study of the de-intercalation of anions and lithium cations from [LiAl2(OH)6]nX·qH2O (X = Cl−, Br−, NO3−, SO42−)

“…Investigation of the de-intercalation of lithium chloride from Li,Al-Cl has shown that treatment with large amounts of water at T w 70 uC leads to almost complete release of LiCl from the LDH giving polycrystalline gibbsite Al(OH) 3 . 4,25 Despite these earlier investigations, there is still a lack of quantitative information relating to the kinetics of these processes. Furthermore, recent findings have shown that these reversible intercalation/de-intercalation cycles result in dramatic changes in the morphology and polydispersity of the resultant Al(OH) 3 crystallites, producing significant increases in the specific surface area (factor of 30-50) of the Al(OH) 3 product phase.…”

“…Furthermore, recent findings have shown that these reversible intercalation/de-intercalation cycles result in dramatic changes in the morphology and polydispersity of the resultant Al(OH) 3 crystallites, producing significant increases in the specific surface area (factor of 30-50) of the Al(OH) 3 product phase. 4,25 These processes also lead to a significant reduction in the trace levels of sodium in the Al(OH) 3 . This is beneficial for the preparation of either sodium-free Al(OH) 3 or Al 2 O 3 -based catalysts and solid supports.…”