title: Scalable preparation of alginate templated-layered double hydroxide mesoporous composites with enhanced surface areas and surface acidities.
abstract: Layered double hydroxides (LDHs), also known as hydrotalcite-like layered clays, have previously been investigated as a potential solid alkaline catalyst. A necessary calcinations/rehydration procedure, however, is utilized to enhance surface area and catalytic activity of LDHs involved. Here we report on a scalable preparation of sodium alginate-templated MgAI-LDH (LDH/SA) mesoporous composites with high surface area and surface acidity. The powdery LDH/SA mesoporous composites are prepared using alginate as template by a scalable method of separate nucleation and aging steps (SNAS). Comparison with the pristine MgAl-LDH shows that the obtained LDH/SA composites exhibit the greatly enhanced surface area and surface activity of surface acid sites at the elevated high temperatures which have scarcely been reported previously. Our results may allow designing a variety of mesoporous LDH-containing composites with potential applications in specific catalysis and purification processes.
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Lina
authors.initials: L
authors.lastname: Zhao
authors.forename: Ting
authors.initials: T
authors.lastname: Xu
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Lei
authors.forename: Sailong
authors.initials: S
authors.lastname: Xu
authors.forename: Fazhi
authors.initials: F
authors.lastname: Zhang
mesh_terms: D000464:Alginates / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D016062:Porosity; D012972:Sodium Hydroxide / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D046911:Macromolecular Substances; D012972:Sodium Hydroxide; D020723:Glucuronic Acid