Titanium dioxide and an electro-conductive titanium oxide which each includes particles having a large major-axis length in a large proportion and comprises columnar particles having a satisfactory particle size distribution. A titanium compound, an alkali metal compound, and an oxyphosphorus compound are heated/fired in the presence of titanium dioxide nucleus crystals having an aspect ratio of 2 or higher to grow the titanium dioxide nucleus crystals. Subsequently, a titanium compound, an alkali metal compound, and an oxyphosphorus compound are further added and heated/fired in the presence of the grown titanium dioxide nucleus crystals. Thus, titanium dioxide is produced which comprises columnar particles having a weight-average major-axis length of 7.0-15.0 μm and in which particles having a major-axis length of 10 μm or longer account for 15 wt. % or more of all the particles. A solution of a tin compound and a solution of compounds of antimony, phosphorus, etc. are added to a suspension obtained by suspending the titanium dioxide. The particles are sedimented. Subsequently, the product obtained is heated/fired to produce an electro-conductive titanium oxide which comprises the titanium dioxide and an electro-conductive coating formed on the surface thereof.

The present invention disclosed use of lactam as a solvent in the preparation of nanomaterials by precipitation method, sol-gel method or high temperature pyrolysis. These methods are able to recycle lactam solvent, which meet requirements of environmental protection.

The present invention provides a method of producing titanium oxide capable of maintaining a high content of an anatase form crystal phase at a low cost even under a high temperature environment. The method of producing titanium oxide includes a step of synthesizing titanium oxide by using an aqueous solution obtained by dissolving titanium tetrachloride and an α-hydroxycarboxylic acid having 3 carboxy groups as a reaction liquid and bringing the reaction liquid to a reaction temperature of 60° C. or higher and the boiling point of the reaction liquid or lower, wherein the ratio of the amount (mol) of the α-hydroxycarboxylic acid to the amount (mol) of Ti in the reaction liquid is 0.006 or more and 0.017 or less, and the concentration of Ti in the reaction liquid is 0.07 mol/L or more and 0.70 mol/L or less.

The present invention relates to a method for manufacturing a structure of a titanium compound selected from the group consisting of sheets, wires and tubes. The present invention also relates to intermediate products and structures comprising titanium dioxide obtainable by the method. The invention provides an improved method giving improved yield as well as other advantages.

The present invention relates to coating compositions, comprising i) single or mixed metal oxide nanoparticles, wherein the volume average diameter (D.sub.v50) of the metal oxide nanoparticles is in the range of 1 to 20 nm; the nanoparticles comprise at least one volatile surface-modifying compound selected from alcohols, β-diketones, or salts thereof; carboxylic acids and β-ketoesters and Ge mixtures thereof, wherein the total amount of volatile surface-modifying compounds is at least 5% by weight, preferably at least 10% by weight based on the amount of metal oxide nano-particles, and ii) a solvent, coatings obtained therefrom and the use of the comositions for coating surface relief micro- and nanostructures (e.g. holograms), manufacturing of optical waveguides, solar panels, light outcoupling layers for display and lighting devices and anti-reflection coatings. Coatings obtained from the coating composition have a high refractive index and holograms are bright and visible from any angle, when the coating compositions are applied to them.

The present invention relates to metallurgical processes, and more particularly to a process for producing titaniferous feedstock and fines, a process for agglomerating titaniferous fines, and a process for producing titaniferous metals and titaniferous alloys. Recovery of rare-earth, vanadium and scandium from titanium iron bearing resources is also disclosed. Selective leaching for Scandium recovery from all magnetite type resources such as ilmenite, ferro titanic resources, nickel laterites, magnetite iron resources etc.

The present disclosure provides a manufacturing method of a titanium dioxide solution and a titanium dioxide film. The manufacturing method of the titanium dioxide solution includes: mixing choline chloride, urea, boric acid, and titanium tetrachloride to form a first solution, wherein a molar concentration ratio of choline chloride to urea is 1:2, a molar concentration of titanium tetrachloride is 0.2 M to 0.4 M, and weight/volume of boric acid is 5 g/300 ml to 15 g/300 ml; and heating the first solution to form a second solution, wherein the second solution contains carbon/nitrogen doped titanium dioxide. In the manufacturing method of the present disclosure, the deep eutectic solution formed by choline chloride and urea may be used as a solvent, and may also be used as a carbon source and/or a nitrogen source. Therefore, titanium dioxide may be doped with carbon and/or nitrogen during the formation process.

The present invention relates to surface functionalized titanium dioxide nanoparticles, a method for its production, a coating composition, comprising the surface functionalized titanium dioxide nanoparticles and the use of the coating composition for coating holo-grams, wave guides and solar panels. Holograms are bright and visible from any angle, when printed with the coating composition, comprising the surface functionalized tita-nium dioxide nanoparticles.

Provided is a titanium dioxide paste that can form a porous semiconductor layer having excellent close adherence with a conductive substrate. The titanium dioxide paste contains titanium dioxide nanoparticles and water, and has a pH of not lower than 2.6 and not higher than 3.5.

Provided are a self-cleaning coating, a self-cleaning fiber, a self-cleaning carpet and uses thereof. The self-cleaning coating is provided with a porous structure where pores communicate with one another; the volume of the pores comprised in the coating makes up 20%-98% of the total volume of the coating; and the pore diameter of the pores in the porous structure is between 0.5 nm-50 nm. The self-cleaning coating is mainly prepared from host materials; the host materials are one or more of titanium oxide, zirconia, titanium nitride, silicon oxide, tungsten oxide, g-C.sub.3N.sub.4 semiconducting polymer, perovskite semiconductor, silver, iron, gold, aluminum, copper, zinc, tin and platinum.