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AssigneeInstituto Mexicano Del Petroleo
InventorsJose Antonio Toledo Antonio, Carlos Angeles Chavez, Maria Antonia Cortes Jacome, Fernando Alvarez Ramirez, Yosadara Ruiz Morales, Gerardo Ferrat Torres, Luis Francisco Flores Ortiz, Esteban Lopez Salinas, Marcelo Lozada y Cassou
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Nanomaterials of the JT phase of the titanium oxide TiO2-x, where 0≦x≦1 having as a building block a crystalline structure with an orthorhombic symmetry and described by at least one of the space groups 59 Pmmn, 63 Amma, 71 Immm or 63 Bmmb. The nanomaterials are in the form of nanofibers, nanowires, nanorods, nanoscrolls and/or nanotubes and are obtained from a hydrogen titanate and/or a mixed sodium and hydrogen titanate precursor compound that is isostructural to the JT crystalline structure. The titanates are the hydrogenated, the protonated, the hydrated and/or the alkalinized phases of the JT crystalline phase that are obtained from titanium compounds such as titanium oxide with an anatase crystalline structure, amorphous titanium oxide, and titanium oxide with a rutile crystalline structure, and/or directly from the rutile mineral and/or from ilmenite.
Nanomaterial of hydrogen titanate and/or mixed sodium and hydrogen titanate, having the formula HTiO2 and/or NaxH1-xTiO2, wherein x is from 0 to less than 1, the hydrogen and sodium atoms are in the interlayer regions of the orthorhombic structure and said nanomaterial has a nanotubular morphology constituted of piled structural layers that are folded or rolled inwards into themselves, or formed by overlapped semitubes.
A method for the production of nanotubes of hydrogen titanate and/or mixed sodium and hydrogen titanate comprising contacting a titanium oxide of the anatase phase, said anatase phase titanium dioxide having a crystal size between 5 and 10 nm with sodium hydroxide to form a suspension, subjecting said suspension to a synthesis procedure with reflux in a closed system with continuous stifling between 100-500 rpm under autogenous pressure at a temperature in the range of 80° to 120° C. to form a hydrogen titanate and/or a mixed sodium and hydrogen titanate with orthorhombic structure.
Dependencies are inferred from the claim text.