Introduction The extraction of alumina from bauxite by the Bayer process produces a slurry by-product referred to as ‘bauxite residue’ or ‘red mud’. The liquid component of the slurry is highly alkaline and requires neutralisation to render it environmentally benign. A common practice is neutralisation using Mg rich seawater, which results in the formation of the layered double hydroxide (LDH) ...

Abstract The one-pot production of a relevant chemical such as 1,5-pentanediol (1,5-PDO) from sustainable sources (furfural) is key reaction to compete with existing fossil sources. This work provides new evidence on the influence starting reagent, features layered double hydrotalcite (LDH)-derived catalysts in form mixed metal oxides (MMO) and conditions productivity 1,5-PDO under batch condit...

The aim of this study is the improvement of the photostability of anionic dye, methyl orange(MO), by intercalation into the hydrotalcite layer (Mg-F-MO LDH). It was found that the thermostability of MO was markedly improved by intercalation into the hydrotalcite host, whilst the photostability was enhanced slightly. The effect of the stability enhancement is larger when the amount of introduced...

X6Al2HT500 hydrotalcites, where X represents Mg, Fe, Cu or Zn were synthetized and investigated before and after gold deposition for toluene and CO total oxidation reactions. The samples have been characterized by specific areas, XRD measurements and Temperature Programmed Reduction. Concerning the toluene total oxidation, the best activity was obtained with Au/Cu6Al2HT500 catalyst with T50 at ...

Layered double hydroxides (LDHs), also known as anionic clays or hydrotalcite-like materials, are a large family of 2D materials constituted by positively charged sheets of hydroxides intercalated by negatively charged anions. In general, the hydrotalcite structures are very robust, with a wide range of possible compositions and so with easily tunable functional properties. In fact, the most ap...