The Texas A&M University System

Other

UChicago Argonne, LLC

Ohio University

Lynntech, Inc.

Abraham Clearfield

Zhengdong Cheng

Agustin Diaz

Andres F Mejia

Ya-Wen Chang

Mahboobul S Mannan

Stephen Frederic Yates

Mark L Dietz

Romulus Gaita

Paul Sylvester

Anatoly I Bortun

Boris G Shpeizer

Irene DeFilippi

Lyudmila Bortun

Paul Jerus

In some embodiments, the present invention provides amphiphilic nanosheets that comprise lamellar crystals with at least two regions: a first hydrophilic region and a second hydrophobic region. In some embodiments, the amphiphilic nanosheets of the present invention also comprise a plurality of functional groups that are appended to the lamellar crystals. In some embodiments the functional groups are hydrophobic functional groups that are appended to the second region of the lamellar crystals. In some embodiments, the lamellar crystals comprise &#x3b1;-zirconium phosphates. Additional embodiments of the present invention pertain to methods of making the aforementioned amphiphilic nanosheets. Such methods generally comprise appending one or more functional groups to a stack of lamellar crystals; and exfoliating the stack of lamellar crystals for form the amphiphilic nanosheets.

Amphiphilic nanosheets and methods of making the same

In some embodiments, the present invention provides amphiphilic nanosheets that comprise lamellar crystals with at least two regions: a first hydrophilic region, and a second hydrophobic region. In some embodiments, the amphiphilic nanosheets of the present invention also comprise a plurality of functional groups that are appended to the lamellar crystals. In some embodiments, the functional groups are hydrophobic functional groups that are appended to the second region of the lamellar crystals. In some embodiments, the lamellar crystals comprise &#x3b1;-zirconium phosphates. Additional embodiments of the present invention pertain to methods of making the aforementioned amphiphilic nanosheets. Such methods generally comprise appending one or more functional groups to a stack of lamellar crystals; and exfoliating the stack of lamellar crystals for form the amphiphilic nanosheets.

A new class of supermicroporous mixed oxides, with pore sizes in the 10-20 &#x212b; range has been prepared utilizing basic metal acetates. The reactions are carried out in non-aqueous solvent media to which an excess of amine is added. Hydrolysis of the reagents is effected by addition of a water-propanol mixture and refluxing. The amine and solvent are removed by thorough washing and/or calcining at temperatures as low as 200&#xb0; C. Mixtures of transition metal oxides with either ZrO, TiO, LaO, SiO, AlOor mixtures thereof were prepared. The surface area curves of the pure oxides are Type I with surface areas of 400-600 m/g and up to 1100 m/g for the mixed oxides.

Supermicroporous metal oxides

A bismuth-213 generator comprising an insoluble composition having the general formula Zr(Phosponate)(HPO).nHO, wherein x is between 0 and 2; and n is the number of waters of hydration; and wherein cations of radioactive isotopes selected from radium, actinium and combinations thereof are immobilized on the composition. The value of x may be between about 0.2 and about 1. The phosphonate may be n-phosphonomethyl-miniodiacetic acid (PMIDA), wherein x may be between about 0.1 and about 1.9. The phosphonate may be one or more phosphonate having the formula:HOP&#x2014;(CH)&#x2014;N&#x2014;((CH)COH)&#x2014;((CH)COH),wherein a, b, and c are numbers from 1 to 3 that may or may not be equal. The value of x may also be between about 0.1 and 1.9.

[object Object]

A chemically modified mica composite formed by heating a trioctahedral mica in an aqueous solution of sodium chloride having a concentration of at least 1 mole/liter at a temperature greater than 180 degrees Centigrade for at least 20 hours, thereby replacing exchangeable ions in the mica with sodium. Formation is accomplished at temperatures and pressures which are easily accessed by industrial equipment. The reagent employed is inexpensive and non-hazardous, and generates a precipitate which is readily separated from the modified mica.

Process for preparing chemically modified micas for removal of cesium

A process is disclosed for pillaring layered materials which do not swell appreciably in water. The process comprises first intercalating an amine or other neutral molecule such as an amide or dimethyl sulfoxide between the layers of the material to be pillared. This allows the subsequent incorporation of inorganic pillars which are more temperature stable than the intercalated amine. Also, disclosed are different pillared products produced by the process. The starting materials do not appreciably swell in water and the pillared composition final product is produced by swelling with an inorganic intercalate and then displacing the inorganic intercalate with an inorganic pillaring substance. The pillared composition disclosed in this invention comprises layers of a group IV A or IV B phosphate, alkali titanate, titanium niobate, alkaline niobate, antimonate, manganate, silicate, or metal oxide separated by a pillaring substance, wherein said pillaring substance is selected from the group consisting of aluminum polymer, zirconium polymer, chromium polymer and bismuth polymer.

Pillaring of layered compounds

A process is disclosed for pillaring layered materials which do not swell appreciably in water. The process comprises first intercalating an amine or other neutral molecule such as an amide or dimethyl sulfoxide between the layers of the material to be pillared. This allows the subsequent incorporation of inorganic pillars which are more temperature stable than the intercalated amine.

Homogeneous sodium zirconium silico-phosphates having the formula

Method of making sodium zirconium silico-phosphates

A process for modifying various inorganic compounds defined by the formula:

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College Station, TX, United States of America

Abraham Clearfield