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Objects of nanotechnology such as micro- and nanoparticles are very interesting due to their unique properties. This reprint will be useful to scientists of diverse backgrounds, i.e., material science, organic and inorganic chemistry, biochemistry, and biology.

Technology: general issues --- electropolymerization --- poly(Azure B) --- poly(proflavine) --- DNA sensor --- doxorubicin determination --- electrochemical impedance spectroscopy --- calix[4]arene --- NHC complex --- Suzuki–Miyaura coupling --- DPPC vesicles --- heparin/protamine particles --- hepatocyte --- intravenous injection --- lacZ protein --- nanoparticles --- protein delivery --- self-assembling --- antiviral agent --- nanoparticle --- coronavirus --- viral mechanism of entry --- antiviral mechanism --- therapeutic approaches --- SARS-CoV-2 --- COVID-19 --- polyol synthesis --- rhodium nanoparticles --- surfactants --- role of additives --- morphology control --- toxicity --- bio-imaging --- X-ray fluorescence --- contrast agent --- XFCT --- nanomaterials --- 2D nanostructures --- thiacalix[4]arene --- terpenoids --- geraniol --- X-ray crystal analysis --- 2D monomolecular-layer nanosheets --- polymorphism --- silica --- polystyrene --- maghemite supraparticles --- patchy particles --- seeded-growth emulsion polymerization --- solvent-induced self-assembly --- pillar[5]arene --- tetrazole --- drug delivery systems --- fluorescein --- ceria --- nanorods --- nanosheets --- nanozyme --- biomolecule --- template --- catalysis --- anti-oxidant --- oxygen radicals --- lithium iron phosphate --- hydrothermal synthesis --- heating rate --- morphology --- crystallinity and purity --- polyelectrolyte multilayers --- encapsulation --- calcium carbonate --- drug delivery --- shrinkage --- layered oxides --- perovskites --- bismuth titanates --- exfoliation --- coating --- silver nanoparticles --- AgNPs --- synthesis --- separation --- purification --- n/a --- Suzuki-Miyaura coupling

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Objects of nanotechnology such as micro- and nanoparticles are very interesting due to their unique properties. This reprint will be useful to scientists of diverse backgrounds, i.e., material science, organic and inorganic chemistry, biochemistry, and biology.

Technology: general issues --- electropolymerization --- poly(Azure B) --- poly(proflavine) --- DNA sensor --- doxorubicin determination --- electrochemical impedance spectroscopy --- calix[4]arene --- NHC complex --- Suzuki-Miyaura coupling --- DPPC vesicles --- heparin/protamine particles --- hepatocyte --- intravenous injection --- lacZ protein --- nanoparticles --- protein delivery --- self-assembling --- antiviral agent --- nanoparticle --- coronavirus --- viral mechanism of entry --- antiviral mechanism --- therapeutic approaches --- SARS-CoV-2 --- COVID-19 --- polyol synthesis --- rhodium nanoparticles --- surfactants --- role of additives --- morphology control --- toxicity --- bio-imaging --- X-ray fluorescence --- contrast agent --- XFCT --- nanomaterials --- 2D nanostructures --- thiacalix[4]arene --- terpenoids --- geraniol --- X-ray crystal analysis --- 2D monomolecular-layer nanosheets --- polymorphism --- silica --- polystyrene --- maghemite supraparticles --- patchy particles --- seeded-growth emulsion polymerization --- solvent-induced self-assembly --- pillar[5]arene --- tetrazole --- drug delivery systems --- fluorescein --- ceria --- nanorods --- nanosheets --- nanozyme --- biomolecule --- template --- catalysis --- anti-oxidant --- oxygen radicals --- lithium iron phosphate --- hydrothermal synthesis --- heating rate --- morphology --- crystallinity and purity --- polyelectrolyte multilayers --- encapsulation --- calcium carbonate --- drug delivery --- shrinkage --- layered oxides --- perovskites --- bismuth titanates --- exfoliation --- coating --- silver nanoparticles --- AgNPs --- synthesis --- separation --- purification --- electropolymerization --- poly(Azure B) --- poly(proflavine) --- DNA sensor --- doxorubicin determination --- electrochemical impedance spectroscopy --- calix[4]arene --- NHC complex --- Suzuki-Miyaura coupling --- DPPC vesicles --- heparin/protamine particles --- hepatocyte --- intravenous injection --- lacZ protein --- nanoparticles --- protein delivery --- self-assembling --- antiviral agent --- nanoparticle --- coronavirus --- viral mechanism of entry --- antiviral mechanism --- therapeutic approaches --- SARS-CoV-2 --- COVID-19 --- polyol synthesis --- rhodium nanoparticles --- surfactants --- role of additives --- morphology control --- toxicity --- bio-imaging --- X-ray fluorescence --- contrast agent --- XFCT --- nanomaterials --- 2D nanostructures --- thiacalix[4]arene --- terpenoids --- geraniol --- X-ray crystal analysis --- 2D monomolecular-layer nanosheets --- polymorphism --- silica --- polystyrene --- maghemite supraparticles --- patchy particles --- seeded-growth emulsion polymerization --- solvent-induced self-assembly --- pillar[5]arene --- tetrazole --- drug delivery systems --- fluorescein --- ceria --- nanorods --- nanosheets --- nanozyme --- biomolecule --- template --- catalysis --- anti-oxidant --- oxygen radicals --- lithium iron phosphate --- hydrothermal synthesis --- heating rate --- morphology --- crystallinity and purity --- polyelectrolyte multilayers --- encapsulation --- calcium carbonate --- drug delivery --- shrinkage --- layered oxides --- perovskites --- bismuth titanates --- exfoliation --- coating --- silver nanoparticles --- AgNPs --- synthesis --- separation --- purification

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This Special Issue contains some recently experimental and theoretical advances in hydrogen evolution reaction, oxygen evolution reaction, and oxygen reduction reaction, and the applications in water splitting, proton exchange membrane fuel cells, and lithium-ion batteries.

Technology: general issues --- History of engineering & technology --- Materials science --- SnSe --- 2D materials --- hydrogen evolution --- water splitting --- DFT calculations --- defect engineering --- proton exchange membrane fuel cell --- high energy efficiency --- durability --- degradation --- Pt/C catalyst --- anode --- flexible electronics --- nanosheets --- SnO2 --- oxygen reduction reaction --- fluorination --- density functional theory --- non-noble metal catalyst --- N-doped carbon catalyst --- hydrogen evolution reaction --- porous carbon --- PtNi alloy --- platinum --- nanoparticles --- electrochemistry --- reduced graphite oxide --- microwave --- ionic liquid --- tunable aryl alkyl ionic liquid --- metal-organic frameworks (MOF) --- electrocatalysis --- oxygen evolution reaction (OER) --- nickel --- ketjenblack --- Sm0.5Sr0.5Co1−xNixO3−δ --- perovskite --- cathode electrocatalyst --- OER/ORR --- two-dimensional metal-organic framework --- ligand --- single-atom catalysts --- oxygen evolution reaction --- n/a

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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.

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), 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