840 results about "Titanic acid" patented technology

Lepidocrocite potassium magnesium titanate having a composition represented by the formula K0.2-0.7Mg0.4Ti1.6O3.7-4 and obtainable by subjecting an aqueous slurry of lepidocrocite potassium magnesium titanate having a composition represented by the formula K0.8Mg0.4Ti1.6O4 to an acid treatment and subsequent calcination. <IMAGE>

The invention belongs to an organic metal oxide-TiO2 photocatalyst preparing process, especially relating a synthesizing method of low temperature-crystallizing nanometer TiO powder and sol with high catalytic activity. And it obtains n-titanic acid deposit by making alkali neutralization and dilution hydrolyzation or heating hydrolyzation on titanic solution, and implements synthesizing related system nano crystal materials with normal-pressure and low-temperature liquid phases by such a processing process of re-dispersing the deposit by oxydol. And it largely reduces the cost of raw materials and avoids using titanium tetrachloride with strong corrosivity, reducing equipment requirements.

The invention discloses a rare-earth modified Ti-Zr chemical passivation solution for surface treatment of aluminium profiles and a using method of the rare-earth modified Ti-Zr chemical passivation solution. The rare-earth modified Ti-Zr chemical passivation solution is characterized in that the passivation solution is a main salt for auxiliary film-formation, which takes rare-earth compounds as a Ti-Zr passivation treatment solution, and a passivation film is light yellow in appearance and has field judgement property on the quality of a formed film. A formula of the rare-earth modified Ti-Zr chemical passivation solution is as follows: each litre of solution contains 0.5g.L<-1>-10g.L<-1> of potassium fluotitanate (hexafluorotitanic acid), 0.5g.L<-1>-10g.L<-1> of potassium fluozirconate (fluozirconic acid), 0.5g.L<-1>-5g.L<-1> of cerium nitrate (ceric sulfate and ammonium ceric nitrate), 2g.L<-1>-10g.L<-1> of potassium nitrate, 0.5g.L<-1>-3g.L<-1> of sodium fluoride (potassium fluoride), 0.5g.L<-1>-1g.L<-1> of sodium dodecyl benzene sulfonate or OP-10, 0.2mL-5mL.L<-1> of nitric acid and 1g.L<-1>-5g.L<-1> of boric acid. The using method of the rare-earth modified Ti-Zr chemical passivation solution comprises the following steps of: (1) clearing dirt, such as dirt attached to an aluminium alloy; (2) pretreating the surface of the aluminium alloy; (3) carrying out passivating treatment on the surface of the aluminium alloy by using the rare-earth modified Ti-Zr chemical passivation solution; and (4) washing the aluminium alloy by using water and drying the aluminium alloy. The rare-earth modified Ti-Zr chemical passivation solution disclosed by the invention has the advantages of light yellow appearance, high film formation speed, simple process, uniformity in film layer, strong corrosion resistance, low environment pollution and the like.

The invention discloses a method for preparing metal doped TiO2 nanocrystal particles. The method comprises the following steps: dispersing a titanium source in a metal ion aqueous solution, hydrolyzing to obtain metal ion doped hydrated titanic acid precipitation, dispersing the metal ion doped hydrated titanic acid precipitation in a hydrogen peroxide aqueous solution, and hydrothermally reacting to obtain the metal doped TiO2 nanocrystal particles. The method for preparing the metal doped TiO2 nanocrystal particles, which is disclosed by the invention, can be used for preparing metal doped monodisperse and suspended TiO2 nanocrystal particles with visible-light activity, and the method has a good application prospect in the fields of photocatalytic air purification, photocatalytic water treatment and the like.

The invention relates to a metal titanium surface titanium oxide nanowire film and the preparation method. The component of the prepared film can be titanate, titanic acid or titanium dioxide, the diameter of the nanowire is between 10nm to 100nm, the nanowires are interlaced and winded to form a great amount of large holes and mesopore networks, and the pore space is between 20nm to 500nm. The main procedures of the preparation method are: firstly, pickling cleaning of the metal titanium surface; secondly, mixed oxidizing solution of strong alkali and oxydol is used to oxidize the metal titanium surface and to form the titanate nanowire film; thirdly, acid soaking is adopted to exchange alkaline metal ions to form the titanic acid nanowire film; fourthly, the titanium dioxide nanowire film is formed through high temperature torrefying. The preparation method of the metal titanium surface titanium oxide nanowire film of the invention is simple, the cost is low, the method is suitable for large-scale industrial production, and the prepared titanium oxide has the application prospect in photochemical catalysis related field and the electrochemistry sensing related field.

This invention relates to a sol to gel method to process load nanometer titania effective light catalyzer thin film process method, which belongs to light catalyzer materials chemical technique field and comprises the following steps: using the pure titanic acid butonate and absolute ethyl alcohol, aminoethyl alcohol, water, poly-glycol 600 as materials; getting transparent stable light yellow titania sol through common temperature chemical reaction; then adopting the dipping and lifting method to load titania thin film on metal wire surface; finally burning in Muffle furnace under temperature of 450íµ to 550íµ to get the light catalyzer thin film.

The invention relates to a preparation method of nanocrystals, particularly a preparation method of {001} face exposed titanium dioxide nanocrystals. The invention solves the technical problems of large particle size and small specific areas in the {001} face exposed titanium dioxide nanocrystals prepared by the existing method. The method comprises the following steps: 1. preparing protonized titanic acid hydrate; 2. washing the protonized titanic acid hydrate with alcohol, transferring into a polytetrafluoroethylene hydrothermal kettle, adding alcohol and a hydrofluoric acid water solution, keeping the temperature, carrying out centrifugal separation to obtain a precipitate, washing with water, washing with alcohol, drying, and grinding to obtain the {001} face exposed titanium dioxide nanocrystals. The titanium dioxide product obtained by the method is a pure anatase phase, the exposure rate of the {001} face is 26-66%, the maximum specific area is 155m<2>g<-1>, and the minimum average particle size of the crystals is 11nm.

The invention discloses a method for preparing co-doped TiO2 nano-sol, which comprises the following steps: 1) dripping butyl titanate into absolute ethyl alcohol followed by continuous stir till the end of drip; then adding in concentrated hydrochloric acid followed by continuous stir, and then still stirring for 25-35min at the end of addition to produce blended solution; 2) dripping the above blended solution into de-ionized water with continuous stir, stirring for further 70-80min after dripping and then vibrating for 13-18min in ultrasonic wave to produce sol; 3) adding polyethylene glycol, urotropine and AgNO3 into the above sol and stirring for 55-65min to produce nano-sol. The co-doped TiO2 nano-sol prepared in the invention has the functions of Einstein shift of ultraviolet ray, photocatalysis after absorption of visible light and light source free antisepsis etc.

The invention discloses a preparation method of a kieselguhr load type compound photocatalyst with iron ions doped with titanium dioxide, comprising the following steps: (1) mixing titanic acid esters or titanium salt with an alcoholic solvent, and then adding kieselguhr into the alcoholic solvent and stirring so as to form slurry; (2) dissolving iron salt into water to form an iron salt solution, and in a water bath with the temperature of 10-95 DEG C, dropping the iron salt solution into the slurry and stirring so that the titanic acid esters or the titanium salt inside the slurry is hydrolyzed to obtain colloidal sols; (3) aging the colloidal sols under room temperature to obtain dried gel; and (4) baking the dried gel for 0.5-5 hours under the temperature of 200-800 DEG C to obtain the kieselguhr load type compound photocatalyst with the iron ions doped with the titanium dioxide. The compound photocatalyst prepared by the method can effectively process waste water.