Synthesis of delaminated LDH: A facile two step approach

Abstract

One-step synthesis of carbonate-free nitrate containing LDHs was achieved using hexamine hydrolysis at low temperature and the products were delaminated successfully in water; materials showed total delamination in formamide while restacking behavior depended critically on the medium.

Delaminated CoAl‐Layered Double Hydroxide@TiO2 Heterojunction Nanocomposites for Photocatalytic Reduction of CO2

“…However, the intensity of the ( d 00 n ) reflections was significantly suppressed in the delaminated material indicating a loss of long range order and delamination along the ( d 00 n ) planes, while the ( d 012 ) peak intensity remained similar to the parent LDH indicating that intralayer crystallinity was retained. The interlayer spacing of the parent CoAl‐LDH was 0.84 nm (determined from the d 003 reflection), consistent with the presence of interlayer NO 3 2− anions and water . Inductively‐coupled plasma optical emission spectroscopy (ICP‐OES) confirmed that the Co:Al stoichiometry was ≈2:1 for both parent and delaminated materials (Table S1, Supporting Information).…”

Layered zinc hydroxide salts: Delamination, preferred orientation of hydroxide lamellae, and formation of ZnO nanodiscs

“…A standard procedure involves the treatment of LDH by a solvent of high polarity like formamide [21][22][23][24]. The ability to delaminate can be tuned by organic anions in an interlayer space allowing delamination in more benign solvents, e.g., in 1-butanol [25,26] or even in water [27][28][29]. An alternative strategy is based on coprecipitation of LDH in a reverse microemulsion system [30].…”

Structure and crystallization behaviour of syndiotactic polystyrene/layered double hydroxide nanocomposites

“…Conventional Co‐Al LDHs exhibit a hexagonal platelet‐like morphology due to the crystallographic habit of LDHs . Kannan and co‐workers reported a mixture of hexagonal and circular platelets for Co‐Al LDHs and ascribed it to the variation in the charge balancing anion . The FTIR spectrum of the Co‐Al LDHs provided evidence for the presence of CO 3 2− , NO 3 − and water molecules (Fig.…”