Abstract:
A material that is useful as a wear-resistant member, a highly functional photocatalytic material, a photoelectric conversion element material, etc., is produced without the need for complicated processes or complicated handling, which are problems of the prior art. Provided is a method for producing a surface-treated metallic titanium material or titanium alloy material, the method comprising the steps of (1) forming titanium nitride on the surface of a metallic titanium material, and (2) heating the metallic titanium material with titanium nitride formed on the surface thereof obtained in step (1) in an oxidizing atmosphere. Also provided is a method for producing a surface-treated metallic titanium material or titanium alloy material, the method comprising, between steps (1) and (2) above, the step of anodizing the metallic titanium material with titanium nitride formed on the surface thereof obtained in step (1) in an electrolyte solution that does not have an etching effect on titanium, thereby forming a titanium oxide film. Further provided is a surface-treated material.
Abstract:
An object of the present invention is to provide a dye-sensitized solar cell that can exhibit high electrical power corresponding to high photoelectric conversion efficiency.Provided is a dye-sensitized solar cell in which a photoelectrode and a counter electrode are disposed opposite to each other via an electrolyte layer; (1) the photoelectrode comprising a titanium material and a titanium oxide layer containing a dye sensitizing agent formed on the titanium material; (2) the counter electrode comprising a transparent conductive glass or transparent conductive film coated with an electrochemical-reduction catalyst layer; and (3) a light-concentrating device being disposed on the counter electrode side.
Abstract:
An object of the present invention is to produce a member useful for preventing edible oil from degrading by performing simple, economical, and safe steps.A method for producing an edible oil degradation-preventing member, comprising the steps of: (1) forming titanium nitride on the surface of a metallic titanium material or titanium alloy material by one treatment method selected from the group consisting of a heat treatment under an ammonia gas atmosphere and a heat treatment under a nitrogen gas atmosphere, at a heating temperature of 750° C. or higher; (2) anodizing the metallic titanium material or titanium alloy material with the titanium nitride formed on the surface thereof obtained in step (1) by applying a voltage of 10 V or more in an electrolyte solution having no etching effect on titanium, thereby forming a titanium oxide film; and (3) heating the metallic titanium material or titanium alloy material with the titanium oxide film formed on the surface thereof obtained in step (2) at a temperature of 400° C. or higher in an atmosphere selected from an air atmosphere, a mixed atmosphere of oxygen gas and nitrogen gas, and an oxygen gas atmosphere.
Abstract:
A dye-sensitized solar cell with high photoelectric conversion efficiency and excellent durability is provided.The dye-sensitized solar cell comprises a photoelectrode and a counter electrode that are disposed opposite to each other via an electrolyte layer; (1) the photoelectrode comprising a metal titanium material or titanium alloy material, and a semiconductor layer formed on the metal titanium material or titanium alloy material, the semiconductor layer containing a dye sensitizing agent; (2) the counter electrode comprising a metal titanium material or titanium alloy material coated with an electrochemical-reduction catalyst layer; (3) a light irradiation means being disposed between the photoelectrode and the counter electrode.
Abstract:
The present invention provides a novel method for treating soil-contaminated water, the method using a photocatalytic material capable of efficiently removing, by light irradiation alone, volatile organic compounds and heavy metals that give rise to soil contamination. The present invention provides a method for treating soil-contaminated water that detoxifies volatile organic compounds contained in soil-contaminated water using a photocatalytic material, the method being characterized by including the steps of (1) subjecting the soil-contaminated water to a gas-liquid separation to obtain a gas phase, and (2) decomposing the volatile organic compounds contained in the gas phase obtained in step (1) using the photocatalytic material. The present invention further provides a method for treating soil-contaminated water using a photocatalytic material to remove heavy metals contained in the soil-contaminated water, the method being characterized, by including the steps of (1) subjecting the soil-contaminated water to a gas-liquid separation to obtain a liquid phase, and (2) removing the heavy metals contained in the liquid phase obtained in step (1) using the photocatalytic material.
Abstract:
The present invention provides a novel method for treating soil-contaminated water, the method using a photocatalytic material capable of efficiently removing, by light irradiation alone, volatile organic compounds and heavy metals that give rise to soil contamination. The present invention provides a method for treating soil-contaminated water that detoxifies volatile organic compounds contained in soil-contaminated, water using a photocatalytic material, the method being characterized by including the steps of (1) subjecting the soil-contaminated water to a gas-liquid separation to obtain a gas phase, and (2) decomposing the volatile organic compounds contained in the gas phase obtained in step (1) using the photocatalytic material. The present invention further provides a method for treating soil-contaminated water using a photocatalytic material to remove heavy metals contained in the soil-contaminated water, the method being characterized, by including the steps of (1) subjecting the soil-contaminated water to a gas-liquid separation to obtain a liquid phase, and (2) removing the heavy metals contained in the liquid phase obtained in step (1) using the photocatalytic material.