Co-Al nanosheets derived from LDHs and their catalytic performance for syngas conversion

A ratiometric luminescence nanoprobe based on layered terbium hydroxide nanosheets for quantitative detection of an anthrax biomarker

“…20 The bands at 1130 and 1124 cm −1 are ascribed to the C-OH stretching vibrations. 35,36 The band at around 617 cm −1 ascribed to the Tb-O vibrations also verify the formation of the layered composites. 24,25,28 Fig.…”

4-Aminoacetophenone Intercalated CoAl Layered Double Hydroxides: Synthesis, Characterization and Adsorptive Removal of Cd(II) ions from Water Samples

“…2 shows FT-IR spectra of CoAl-NO 3 -LDH (a), calcined CoAl-LDH (b) and CoAl-AAP-LDH (c). Peaks in spectrum-a at 3377.69 cm -1 correspond to stretching vibrations of O-H bonds of LDH sheet and intercalated water [23], peak at 1646.56 cm -1 attributed to bending vibration of O-H bond of intercalated water [9], peak at 1346.49 cm -1 corresponds to stretching vibration of N=O bond of intercalated nitrate ions [24,25] 113) planes (hkl) of hexagonal CoAl-NO 3 -LDH phase, respectively, which confirmed the formation of hydrotalcite-like structured CoAl-NO 3 -LDH [26]. According to Bragg's law (d = nλ/2Sinθ, where λ is the wavelength of X-rays (for Cu Kα, λ = 1.54056 Å) and n=1 (order of diffraction) and θ is the position of peaks in radian) [24], the d 006 (basal spacing) in CoAL-NO 3 -LDH was found to be 0.76 nm, which indicated the intercalation of water molecules and nitrate anions between hydrotalcite-like layers.…”

“…Fig.2shows FT-IR spectra of CoAl-NO 3 -LDH (a), calcined CoAl-LDH (b) and CoAl-AAP-LDH (c). Peaks in spectrum-a at 3377.69 cm -1 correspond to stretching vibrations of O-H bonds of LDH sheet and intercalated water[23], peak at 1646.56 cm -1 attributed to bending vibration of O-H bond of intercalated water[9], peak at 1346.49 cm -1 corresponds to stretching vibration of N=O bond of intercalated nitrate ions[24,25] and peak at 844.48 cm -1 attributed to stretching vibrations of M-O (Co-O and Al-O) bond of metal hydroxides, respectively [22]. This spectral information indicated the intercalation of nitrate ions and water into the CoAl-LDH.…”

Cobalt Nanoparticle-Decorated LDH/ZIF-Derived Porous Nanoplatelets for Fischer–Tropsch Synthesis

“…Fischer–Tropsch synthesis (FTS) is a key technology for turning fossil resources or renewable sources into liquid hydrocarbons and high-value chemicals. − FTS has received extensive attention on account of its important role in environmental conservation and energy utilization. Transition metals such as cobalt (Co), iron (Fe), and ruthenium (Ru) are commonly used FTS catalysts, among which Co is the most widely employed active phase for low-temperature FTS in the industrial process, because Co catalysts show satisfactory selectivity to C 5+ long-chain hydrocarbons with a weak water–gas shift tendency. ,,− Notably, the size and loading of active Co have a great influence on the FTS catalytic performance, and the catalytic activity and selectivity are optimal when the particles range from 8 to 30 nm. , Impregnation is widely used to prepare industrial FTS catalysts . However, the Co loading is usually lower than 20 wt % using this method. , On account of this, the deposition–precipitation method is developed as an alternative approach to realize higher loadings .…”