Consolidation of Metal Oxide Nanocrystals. Reactive Pellets with Controllable Pore Structure That Represent a New Family of Porous, Inorganic Materials

Ryan M. Richards; Weifeng Li; Shawn Decker; Chet Davidson; Olga Koper; Vladimir Zaikovski; Alexander M. Volodin; T. P. Rieker; Kenneth J. Klabunde

doi:10.1021/ja994383g

Abstract

Nanocrystals of MgO (4 nm) exist as polyhedral structures with high surface concentrations of edge/corner sites. In powder form the crystallites weakly agglomerate into porous weblike structures of approximately 1400 nm according to small-angle X-ray scattering. Upon consolidation of these fine powders under pressure, pellets can be readily prepared that maintain their high surface areas, and small crystallite sizes. In addition, large pore volumes and pore size openings can be controllably decreased with pelletization pressure increase. The pellets retain their voracious adsorbent affinities and capacities for a wide variety of organic molecules and acid gases. Quantitative measurements on the adsorption of a series of alcohols vs pelletization pressure reveal a pattern of molecular size selectivity.

Keywords

CrystalliteChemistryPorosityPelletsAgglomerateChemical engineeringAdsorptionPelletizingNanocrystalMoleculeOxideMineralogyCrystallographyAnalytical Chemistry (journal)ChromatographyOrganic chemistryComposite materialMaterials science

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Publication Info

Year: 2000
Type: article
Volume: 122
Issue: 20
Pages: 4921-4925
Citations: 248
Access: Closed

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APA Style

                            
                                
                                    Ryan M. Richards, 
                                
                                    Weifeng Li, 
                                
                                    Shawn Decker
                                
                                et al.
                            
                            (2000). 
                            Consolidation of Metal Oxide Nanocrystals. Reactive Pellets with Controllable Pore Structure That Represent a New Family of Porous, Inorganic Materials. 
                            Journal of the American Chemical Society
                            , 122
                            (20)
                            , 4921-4925.
                            https://doi.org/10.1021/ja994383g
                        

Identifiers

DOI: 10.1021/ja994383g