Abstract: A photocatalyst laminate which is composed of an undercoat layer provided on a substrate and a photocatalyst layer laminated on the surface of the undercoat layer. The undercoat layer contains (A) 100 parts by mass of a resin component and (B) 0.1-50 parts by mass of fine core-shell particles, each of which has a core that is formed of a fine tetragonal titanium oxide solid solution particle wherein tin and manganese are solid-solved and a shell that is formed from silicon oxide on the outside of the core. This photocatalyst laminate is not susceptible to decrease in the photocatalyst function even under outdoor exposure for a long period of time, and is thus capable of providing a coated article that exhibits excellent weather resistance.

Abstract: A photocatalyst/alloy fine-particle dispersion containing two kinds of fine particles dispersed in an aqueous dispersion medium, (i) photocatalyst fine particles and (ii) alloy fine particles containing an antibacterial/antifungal metal, easily forms a photocatalyst/alloy fine-particle thin film of high transparency that exhibits antibacterial/antifungal properties regardless of the presence or absence of light irradiation.

Abstract: A deodorizing/antibacterial/antifungal agent containing two kinds of fine particles, (i) titanium oxide fine particles and (ii) alloy fine particles containing an antibacterial/antifungal metal, gives a thin film of high transparency which has deodorizing properties and also exhibits antibacterial/antifungal properties.

Abstract: As a visible-light-responsive photocatalytic-titanium-oxide-particulate dispersion liquid that can achieve a high visible light activity and is of a type different from the related art, the present invention provides a visible-light-responsive photocatalytic-titanium-oxide-particulate dispersion liquid in which two types of titanium oxide particulates are dispersed in an aqueous dispersion medium. The two types of titanium oxide particulates are first titanium oxide particulates, in which a tin component and a transition metal component (but excluding an iron-group component) for enhancing visible light responsiveness are dissolved, and second titanium oxide particulates, in which an iron-group component is dissolved. When a photocatalytic film formed by using this dispersion liquid is used, a high decomposition activity is achieved even in a case where a decomposition substrate has low concentration, which was previously difficult under visible light conditions.

Abstract: The present invention relates to a dispersion liquid of titanium oxide-tungsten oxide composite photocatalytic fine particles that is characterized by having two types of photocatalytic fine particles dispersed in an aqueous dispersion medium, the fine particles including i) fine particles of titanium oxide that contain a peroxotitanium component and a copper component and ii) fine particles of tungsten oxide. The present invention can provide a dispersion liquid and the like that can be used to conveniently manufacture a photocatalytic thin film that demonstrates photocatalytic activity even within visible light (400-800 nm) only, exhibits high antibacterial performance, is highly durable, and wherein the state of copper coordination is stable against exposure to heat and ultraviolet rays and is not easily modified. The dispersion liquid is a dispersion liquid of titanium oxide-tungsten oxide composite photocatalytic fine particles that contains copper-containing titanium oxide fine particles.

Abstract: It is possible to obtain a visible light-responsive photocatalytic nanoparticle dispersion liquid containing copper-containing titanium oxide nanoparticles by subjecting an aqueous peroxotitanic acid solution containing a copper compound to hydrothermal reaction for crystallizing the aqueous solution by means of heat under high pressure. The visible light-responsive photocatalytic nanoparticle dispersion liquid thus obtained exhibits excellent dispersion stability of titanium oxide nanoparticles within a water-based dispersion medium even when left in a cold and dark indoor area for a long period of time, expresses photocatalytic activity even in visible light (400 to 800 nm) alone, and can easily create a photocatalytic thin film which is extremely transparent and exhibits excellent durability, and in which the state of copper coordination when exposed to heat or ultraviolet rays is stable and cannot be easily modified.

Abstract: Provided is a visible-light-responsive titanium oxide microparticle dispersion or the like readily enabling manufacture of a highly transparent photocatalyst thin film demonstrating photocatalyst activity even using visible light alone, and having exceptional titanium oxide microparticle dispersion stability even after storage for prolonged periods of time in cold and dark interior locations. The present invention makes it possible to: produce a peroxotitanic acid solution containing vanadium and a tin compound from a titanium compound, a vanadium compound, a tin compound, a basic substance, hydrogen peroxide, and an aqueous dispersion medium as starting materials; subject the peroxotitanic acid solution to a hydrothermal reaction under high pressure; subsequently admix a copper compound into the acid solution; and obtain a visible-light-responsive titanium oxide microparticle dispersion or the like.

Abstract: A method for manufacturing a microparticulate anatase or rutile titanium oxide dispersion from a peroxotitanic acid solution optionally containing tin, wherein the method for manufacturing an anatase or rutile titanium oxide dispersion is characterized in that the peroxotitanic acid solution is fed continuously to a flow reactor and subjected to hydrothermal treatment at 150 to 250° C. and 0.5 to 10 MPa. The invention makes it possible to provide a method for manufacturing a microparticulate anatase or rutile titanium oxide dispersion having excellent stability in regard to the titanium oxide microparticles and enabling a high-transparency photocatalytic thin film to be produced, and to provide a member having a photocatalytic thin film formed on the surface using this dispersion.

Abstract: The present invention relates to a dispersion liquid of titanium oxide-tungsten oxide composite photocatalytic fine particles that is characterized by having two types of photocatalytic fine particles dispersed in an aqueous dispersion medium, the fine particles including i) fine particles of titanium oxide that contain a peroxotitanium component and a copper component and ii) fine particles of tungsten oxide. The present invention can provide a dispersion liquid and the like that can be used to conveniently manufacture a photocatalytic thin film that demonstrates photocatalytic activity even within visible light (400-800 nm) only, exhibits high antibacterial performance, is highly durable, and wherein the state of copper coordination is stable against exposure to heat and ultraviolet rays and is not easily modified. The dispersion liquid is a dispersion liquid of titanium oxide-tungsten oxide composite photocatalytic fine particles that contains copper-containing titanium oxide fine particles.

Abstract: Provided is a solar cell degradation control-cover glass having a thin film that is formed by applying to a cover glass back surface a coating liquid comprising either an aqueous solution of a water-soluble compound of at least one metal selected from silicon, aluminum, zirconium, tin and zinc or a fine particle dispersion liquid of an oxide of such metal.

Abstract: Core/shell type tetragonal titanium oxide solid-solution particles each consisting of a core of tetragonal titanium oxide having tin and manganese incorporated in solid solution and a shell of silicon oxide are dispersed in an organic solvent. The core/shell type particles have a diameter D50 of 5-50 nm. The amount of tin incorporated in solid solution is to provide a molar ratio Ti/Sn of 10-1,000, and the amount of manganese incorporated in solid solution is to provide a molar ratio Ti/Mn of 10-1,000.

Abstract: It is possible to obtain a visible light-responsive photocatalytic nanoparticle dispersion liquid containing copper-containing titanium oxide nanoparticles by subjecting an aqueous peroxotitanic acid solution containing a copper compound to hydrothermal reaction for crystallizing the aqueous solution by means of heat under high pressure. The visible light-responsive photocatalytic nanoparticle dispersion liquid thus obtained exhibits excellent dispersion stability of titanium oxide nanoparticles within a water-based dispersion medium even when left in a cold and dark indoor area for a long period of time, expresses photocatalytic activity even in visible light (400 to 800 nm) alone, and can easily create a photocatalytic thin film which is extremely transparent and exhibits excellent durability, and in which the state of copper coordination when exposed to heat or ultraviolet rays is stable and cannot be easily modified.

Abstract: Disclosed are: a visible-light-responsive titanium oxide microparticle dispersion comprising an aqueous dispersion medium and titanium oxide microparticles dispersed therein, and a peroxotitanium component, an iron component and/or a copper component and a tin component, wherein the content of the peroxotitanium component is 0.1 to 20 mass % relative to the titanium oxide content; and a process for producing a visible-light-responsive titanium oxide microparticle dispersion, comprising (1) producing peroxotitanic acid containing a tin compound from a raw material titanium compound, a tin compound and hydrogen peroxide, (2) heating an aqueous solution of peroxotitanic acid containing the tin compound to 80 to 250° C.

Abstract: Provided is a visible-light-responsive titanium oxide microparticle dispersion or the like readily enabling manufacture of a highly transparent photocatalyst thin film demonstrating photocatalyst activity even using visible light alone, and having exceptional titanium oxide microparticle dispersion stability even after storage for prolonged periods of time in cold and dark interior locations. The present invention makes it possible to: produce a peroxotitanic acid solution containing vanadium and a tin compound from a titanium compound, a vanadium compound, a tin compound, a basic substance, hydrogen peroxide, and an aqueous dispersion medium as starting materials; subject the peroxotitanic acid solution to a hydrothermal reaction under high pressure; subsequently admix a copper compound into the acid solution; and obtain a visible-light-responsive titanium oxide microparticle dispersion or the like.

Abstract: An inorganic hydrophilic coating solution including (a) an aqueous solution containing an amorphous silicate compound obtained by hydrolyzing and condensing a tetrafunctional silicon compound having a purity of 99.0 mass % or greater in an aqueous medium in the presence of a basic compound at a temperature within a range from normal temperature to 170° C., (b) water, and optionally, (c) not more than 30 mass % of an alcohol, a ketone, or a surfactant, where the concentration of the solid fraction derived from the aqueous solution containing the amorphous silicate compound is 0.01 to 2.0 mass % and the pH is 5 to 8; an inorganic hydrophilic coating film formed from a dried and cured product of the inorganic hydrophilic coating solution; a member having a substrate and the inorganic hydrophilic coating film formed on the surface of the substrate; and a cover panel for a solar cell module including the member.

Abstract: A method for manufacturing a microparticulate anatase or rutile titanium oxide dispersion from a peroxotitanic acid solution optionally containing tin, wherein the method for manufacturing an anatase or rutile titanium oxide dispersion is characterized in that the peroxotitanic acid solution is fed continuously to a flow reactor and subjected to hydrothermal treatment at 150 to 250° C. and 0.5 to 10 MPa. The invention makes it possible to provide a method for manufacturing a microparticulate anatase or rutile titanium oxide dispersion having excellent stability in regard to the titanium oxide microparticles and enabling a high-transparency photocatalytic thin film to be produced, and to provide a member having a photocatalytic thin film formed on the surface using this dispersion.

Abstract: Core/shell type tetragonal titanium oxide particles consisting of a nanosized core of tetragonal titanium oxide having tin and manganese incorporated in solid solution and a shell of silicon oxide around the core are dispersed in an aqueous dispersing medium. The cores and the core/shell type titanium oxide particles have an average particle size of ?30 nm and ?50 nm, respectively. The amount of tin or manganese in solid solution is to provide a molar ratio Ti/Sn or Ti/Mn between 10 and 1,000.

Abstract: Disclosed are: a visible-light-responsive titanium oxide microparticle dispersion comprising an aqueous dispersion medium and titanium oxide microparticles dispersed therein, and a peroxotitanium component, an iron component and/or a copper component and a tin component, wherein the content of the peroxotitanium component is 0.1 to 20 mass % relative to the titanium oxide content; and a process for producing a visible-light-responsive titanium oxide microparticle dispersion, comprising (1) producing peroxotitanic acid containing a tin compound from a raw material titanium compound, a tin compound and hydrogen peroxide, (2) heating an aqueous solution of peroxotitanic acid containing the tin compound to 80 to 250° C.

Abstract: Provided is a vinyl chloride-based resin composition including a vinyl chloride-based resin and a titanium dioxide having an average particle diameter of 5 to 50 nm, in an amount of 1,000 ppm to 10,000 ppm, by mass, relative to the mass of the vinyl chloride-based resin. By adding a titanium dioxide having an average particle diameter of 5 to 50 nm to a vinyl chloride-based resin in an amount described above, a vinyl chloride-based resin composition of excellent thermal stability can be obtained. In the vinyl chloride-based resin composition, the crystalline form of the titanium dioxide is preferably anatase, rutile, or a combination thereof.