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Layered double hydroxides. --- Chemistry. --- Chemistry, inorganic. --- Chemistry, Physical organic. --- Polymers. --- Inorganic Chemistry. --- Polymer Sciences. --- Physical Chemistry. --- Layered double hydroxides --- Hydroxides --- Anions --- Alkalies --- Inorganic Chemicals --- Chemicals and Drugs --- Ions --- Electrolytes --- Inorganic Chemistry --- Chemistry --- Physical Sciences & Mathematics --- Chemicals, Inorganic --- Alkalis --- Alkali --- Double hydroxides, Layered --- LDHs (Chemicals) --- Polymere --- Polymeride --- Polymers and polymerization --- Chemistry, Physical organic --- Inorganic chemistry --- Inorganic chemistry. --- Physical chemistry. --- Inorganic compounds --- Chemistry, Organic --- Chemistry, Physical and theoretical --- Macromolecules --- Polymers  . --- Chemistry, Theoretical --- Physical chemistry --- Theoretical chemistry

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Layered double hydroxides (LDHs), also known as two-dimensional anionic clays, as well as the derived materials, including hybrids, nanocomposites, mixed oxides, and supported metals, have been highlighted as outstanding heterogeneous catalysts with unlimited applications in various processes involving both acid–base (addition, alkylation, acylation, decarboxylation, etc.) and redox (oxidation, reduction, dehydrogenation, etc.) mechanisms. This is mainly due to their flexibility in chemical composition, allowing the fine tuning of the nature of the active sites and the control of the balance between them. Additionally, LDHs display a large anion exchange capacity and the possibility to modify their interlayer space, constraining the size and type of reactants entering in the interlamellar space. Furthermore, their easy and economic synthesis, with high levels of purity and efficiency, at both the laboratory and industrial scales, make LDHs and their derived materials excellent solid catalysts. This Special Issue collects original research papers, reviews, and commentaries focused on the catalytic applications of these remarkable materials.

Research & information: general --- Chemistry --- layered double hydroxides (LDH) --- polyoxometalates (POM) --- catalytic materials --- Michael addition --- cobalt-based LDHs --- ultrasonic irradiation --- synergistic effect --- photocatalysis --- nitrophenol degradation --- Zn,Al-hydrotalcite --- ZnO dispersed on alumina --- reusability --- layered double hydroxide --- LDH --- catalytic oxidation --- ethanol --- toluene --- VOC --- photocatalysts --- Cu electrodes --- diazo dyes --- electrocatalysts --- layer double hydroxides --- photoelectrochemical degradation --- hydrotalcites --- mixed oxides --- aldol condensation --- basic catalysts --- exfoliation --- nanosheets --- oxidation --- layered double hydroxides --- base catalysts --- epoxide --- formaldehyde --- oxidation removal --- BiOCl --- manganese --- biodiesel --- transesterification --- hydrothermal --- nickel --- aluminum --- solid base --- structured catalyst --- ethanol steam reforming --- aluminum lathe waste strips --- Ni nanoparticle --- mechano-chemical/co-precipitation synthesis --- organic alkalis (tetramethylammonium hydroxide) --- memory effect --- Claisen-Schmidt condensation --- self-cyclohexanone condensation --- n/a

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Layered Double Hydroxides (LDHs) certainly do not represent a newcomer to the scientific community, yet they continue to attract a strong and general interest among a vast and multifaceted range of researchers. This persistent modernity is definitely due to some peculiar characteristics of these materials, which allow researchers and engineers to play with different aspects of two worlds: organic and inorganic, crystalline and molecular, solid and liquid, cationic and anionic. A virtually infinite number of possible chemical combinations takes advantage of their layered structure to express an unrivaled collection of remarkable properties. The capture and/or release of organic and inorganic species, versatile low-cost catalytic activity, and blending with other compounds to build up a variety of hybrid composites, are just some of the many effects investigated to date. As a result, the applications encompass almost all aspects of our life, ranging from renewable energy production to water purification, including biomedical applications, gas sensing, drug delivery, and food packaging and safety. This Special Issue highlights some of the recent research lines, and shows that remarkable progress has been and is still being made in all these aspects, to allow the consideration of LDHs as one of the most interesting and versatile inorganic materials.

layered double hydroxides --- reconstruction --- curcumin --- drug release --- wastewater --- heavy metals removal --- sol–gel processing --- alkaline earth metals --- mixed metal oxides --- reconstruction effect --- surface properties --- nanocomposites --- nanofillers --- thermal stability --- flammability --- polymer matrix --- HC --- hydrothermal synthesis --- layered double hydroxide --- AFm phase --- calcium hemicarboaluminate --- cement phases --- cement hydration --- C3AH6 --- C4ACH11 --- katoite --- microwave-assisted organic synthesis --- biofuel production --- rehydrated hydrotalcite --- heterogeneous basic catalysis --- green chemistry --- mechanochemistry --- bead mill --- synthesis --- wet grinding --- layered double hydroxides (LDHs) --- other nanoclays --- organically modified LDH --- water purification --- adsorption --- adsorption interaction --- diffusion --- n/a --- sol-gel processing

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Layered double hydroxides (LDHs), also known as two-dimensional anionic clays, as well as the derived materials, including hybrids, nanocomposites, mixed oxides, and supported metals, have been highlighted as outstanding heterogeneous catalysts with unlimited applications in various processes involving both acid–base (addition, alkylation, acylation, decarboxylation, etc.) and redox (oxidation, reduction, dehydrogenation, etc.) mechanisms. This is mainly due to their flexibility in chemical composition, allowing the fine tuning of the nature of the active sites and the control of the balance between them. Additionally, LDHs display a large anion exchange capacity and the possibility to modify their interlayer space, constraining the size and type of reactants entering in the interlamellar space. Furthermore, their easy and economic synthesis, with high levels of purity and efficiency, at both the laboratory and industrial scales, make LDHs and their derived materials excellent solid catalysts. This Special Issue collects original research papers, reviews, and commentaries focused on the catalytic applications of these remarkable materials.

Research & information: general --- Chemistry --- layered double hydroxides (LDH) --- polyoxometalates (POM) --- catalytic materials --- Michael addition --- cobalt-based LDHs --- ultrasonic irradiation --- synergistic effect --- photocatalysis --- nitrophenol degradation --- Zn,Al-hydrotalcite --- ZnO dispersed on alumina --- reusability --- layered double hydroxide --- LDH --- catalytic oxidation --- ethanol --- toluene --- VOC --- photocatalysts --- Cu electrodes --- diazo dyes --- electrocatalysts --- layer double hydroxides --- photoelectrochemical degradation --- hydrotalcites --- mixed oxides --- aldol condensation --- basic catalysts --- exfoliation --- nanosheets --- oxidation --- layered double hydroxides --- base catalysts --- epoxide --- formaldehyde --- oxidation removal --- BiOCl --- manganese --- biodiesel --- transesterification --- hydrothermal --- nickel --- aluminum --- solid base --- structured catalyst --- ethanol steam reforming --- aluminum lathe waste strips --- Ni nanoparticle --- mechano-chemical/co-precipitation synthesis --- organic alkalis (tetramethylammonium hydroxide) --- memory effect --- Claisen-Schmidt condensation --- self-cyclohexanone condensation --- layered double hydroxides (LDH) --- polyoxometalates (POM) --- catalytic materials --- Michael addition --- cobalt-based LDHs --- ultrasonic irradiation --- synergistic effect --- photocatalysis --- nitrophenol degradation --- Zn,Al-hydrotalcite --- ZnO dispersed on alumina --- reusability --- layered double hydroxide --- LDH --- catalytic oxidation --- ethanol --- toluene --- VOC --- photocatalysts --- Cu electrodes --- diazo dyes --- electrocatalysts --- layer double hydroxides --- photoelectrochemical degradation --- hydrotalcites --- mixed oxides --- aldol condensation --- basic catalysts --- exfoliation --- nanosheets --- oxidation --- layered double hydroxides --- base catalysts --- epoxide --- formaldehyde --- oxidation removal --- BiOCl --- manganese --- biodiesel --- transesterification --- hydrothermal --- nickel --- aluminum --- solid base --- structured catalyst --- ethanol steam reforming --- aluminum lathe waste strips --- Ni nanoparticle --- mechano-chemical/co-precipitation synthesis --- organic alkalis (tetramethylammonium hydroxide) --- memory effect --- Claisen-Schmidt condensation --- self-cyclohexanone condensation

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Adequate quality of life and well-being of modern societies is only achievable with sustainable manufacturing processes that efficiently use raw materials, eliminate waste, and avoid the use of hazardous materials. All this is hardly conceivable without catalysis. In a world concerned with the exploitation of natural resources, catalysis can offer direct synthesis routes that maximize resource efficiency. The Iberoamerican society is far too significant and far too involved in global development, owing to its natural richness of resources, not to have an essential role in current developments and future directions. Catalysis, in the Iberoamerican academic and industrial communities, is recognized as a relevant scientific discipline that supports several strategic industrial sectors through the manufacturing of products and materials, and the operationalization of processes to produce energy and other utilities. As a reflection of this, once every two years the Iberoamerican Congress on Catalysis takes place to share and discuss the state-of-the-art of this discipline with the Federation of Iberoamerican Catalysis Societies. This book collected sixteen outstanding contributions, stemming from this exceptional event—one which will undoubtedly mark a turning point and could be a source of inspiration to all those involved in catalysis, particularly the young generation of competent researchers taking their first steps in this incredibly complex and beautiful discipline.

History of engineering & technology --- hydrodeoxygenation --- fast-pyrolysis bio-oil --- nickel catalyst --- upgrading --- peptide bond --- phthalonitriles --- phthalocyanines --- aminocarbonylation --- palladium catalysts --- castor oil --- biofuel --- selective transesterification --- ecodiesel --- biodiesel --- diesel engine --- electricity generator --- smoke opacity --- Bacharach opacity --- aldol condensation --- biomass valorization --- Mg/Al mixed oxides --- surfactant --- microwaves --- influence of water --- FAEEs --- mixed biocatalysts --- lipases --- microalgae --- silver nanoparticles --- zirconia --- hydrocarbons --- diesel soot --- catalytic combustion --- boronic esters --- borylation --- Suzuki–Miyaura --- layered double hydroxides --- copper --- palladium --- Fe/Nb2O5 immobilized catalyst --- emerging pollutants --- degradation --- hydrodesulfurization --- CoMo/Al2O3 --- basic additive --- lanthanum --- MCM-41 --- cerium --- benzyl alcohol --- oxidation --- benzaldehyde --- etherification --- glycerol --- tert-butyl alcohol --- dibutyl ether --- A-15 --- catalyst stability --- Cobalt ferrite --- ethylesters --- biofuels --- hydrotalcite --- transesterification --- fast pyrolysis --- SAPO-5 --- Al-MCM-41 --- dodecanoic acid --- photocatalysis --- Mg/Fe layered double hydroxides --- coprecipitation --- chlorophenols --- mixed oxides --- elimination --- phenol --- Al2O3-TiO2 --- CoMo --- CoMoS --- MoS2 --- desulfurization --- chemisorption --- MPI silica --- Ag nanoparticles --- XPS assessment --- n/a --- Suzuki-Miyaura