Abstract:
A titanium oxide photocatalyst responsive to visible light which can exhibit a high photocatalytic activity in response to visible light is produced by subjecting titanium oxide and/or titanium hydroxide obtained by neutralizing an acidic titanium compound with a nitrogen-containing base to heat treatment in an atmosphere containing a hydrolyzable metal compound (e.g., a titanium halide) and then to additional heat treatment in a gas having a moisture content of 0.5 - 4.0 volume % at a temperature of 350° C or above. The photocatalyst which is a nitrogen-containing titanium oxide has no9 substantial peak at a temperature of 600° C or above in a mass fragment spectrum obtained by thermal desorption spectroscopy in which the ratio m/e of the mass number m to the electric charged e of ions is 28, and the peak having the smallest half band width is in the range of 400 - 600° C in the spectrum. The nitrogen content calculated from the peak appearing at 400 eV ∀ 1.0 eV in the N1s shell bonding energy spectrum obtained by XPS measurement of this photocatalyst is at least 20 times larger than the nitrogen content obtained by chemical analysis.
Abstract:
In a lithium ion secondary battery using a negative electrode material powder including a lower silicon oxide powder as a negative electrode material, a charge electric potential at 0.45-1.0 V relative to a Li reference upon initial charging results in a lithium ion secondary battery having a large discharge capacity with excellent cycle characteristics, which can be durable in practical use. On this occasion, the charge electric potential being 0.45-1.0 V relative to the Li reference upon initial charging means that an electric potential plateau caused by the generation of Li-silicate is observed, and the Li-silicate is uniformly generated in the negative electrode material. The negative electrode material powder according to the present invention having the charge electric potential of 0.45-1.0 V relative to the Li reference upon initial charging prevents the negative electrode material from being finely torn apart upon charging/discharging which results in cycle characteristic degradation, and excellent cycle characteristics are obtained. It is preferable for the negative electrode material powder according to the present invention to have an electrically conductive carbon film on the surface, and for the ratio of the electrically conductive carbon film to the surface of the powder to be 0.2-10 mass %.
Abstract:
Provided is a negative-electrode material powder used for a lithium-ion secondary battery having a large discharge capacity and sufficient cycle characteristics as being durable in use. The powder for the battery includes a conductive carbon film on a lower silicon oxide powder, surface and satisfies requirements that: Si in SiC is 15.1 wt% or less in content, or A3 (=A2-A1) is 15.1 or less, given A1 (wt%): Si content measured by acid solution process, and A2 (wt%): Si content measured by alkali solution process; and a specific resistance is 30,000 Ωcm or less. In the lower silicon oxide powder, a maximum value P1 of SiO x -derived halos appearing at 2θ=10° to 30° and a value P2 of the strongest line peak of Si (111) appearing at 2θ=28.4±0.3°, in XRD using CuKα beam, preferably satisfy P2/P1
Abstract:
Provided is a negative-electrode material powder for a lithium-ion secondary battery including a conductive carbon film on the surface of a lower silicon oxide powder, in which the total content of tar components measured by TPD-MS is not less than 1 ppm by mass and not more than 4000 ppm by mass, and in the Raman spectrum, peaks exist at 1350 cm -1 and 1580 cm -1 , while the peak at 1580 cm -1 has a half-value width of not less than 50 cm -1 and not more than 100 cm -1 . In the negative-electrode material powder, a specific surface area measured by the BET method is preferably not less than 0.3 m 2 /g and not more than 40 m 2 /g, and the proportion of the conductive carbon film is preferably not less than 0.2 mass% and not more than 10 mass%. A specific resistance of the lower silicon oxide powder is preferably not more than 40000 Ωcm, and a maximum value P1 of SiO x -incurred halos and a value P2 of the strongest line peak of Si (111) preferably satisfy a relationship of P2/P1
Abstract:
A negative electrode material powder for a lithium ion secondary battery having a conductive carbon film on the surface of a lower-silicon-oxide powder; wherein a specific surface area in BET measurement ranges from more than 0.3 m 2 /g to 40 m 2 /g, and no SiC peak appears at 2θ= 35.6°±0.01° or the half-value width of the appeared peak is 2° or more in XRD measurement using CuK α rays. The proportion of said carbon film preferably ranges from 0.2% to 2.5% by mass. Said powder preferably has 100000 Ωcm or less of specific resistance. In XRD, P2/P1 x and a value P2 of the strongest linear peak of Si (111) above the halo. Accordingly, said powder can be used in the secondary battery with a large discharge capacity and a preferable cycle characteristics for practical use.
Abstract:
Provided is a negative-electrode material powder for lithium-ion secondary battery including a silicon-rich layer on the surface of a lower silicon oxide powder, and a negative-electrode material powder for said battery comprising a silicon oxide powder, characterized by satisfying c/d x (X
Abstract translation:提供了一种用于包括下部的氧化硅粉末的表面上的富硅层,并且包括氧化硅粉末的负极材料粉末为所述电池的锂离子二次电池的负极材料粉末,通过满足C,其特征 / D <1,其中c是氧与硅的氧化硅粉末的表面上的摩尔比,而d是没有为它们的整个部分。 它优选SATIS外资企业ç<1和0.8
Abstract:
A titanium oxide photocatalyst responsive to visible light which can exhibit a high photocatalytic activity in response to visible light is produced by subjecting titanium oxide and/or titanium hydroxide obtained by neutralizing an acidic titanium compound with a nitrogen-containing base to heat treatment in an atmosphere containing a hydrolyzable metal compound (e.g., a titanium halide) and then to additional heat treatment in a gas having a moisture content of 0.5 - 4.0 volume % at a temperature of 350° C or above. The photocatalyst which is a nitrogen-containing titanium oxide has no9 substantial peak at a temperature of 600° C or above in a mass fragment spectrum obtained by thermal desorption spectroscopy in which the ratio m/e of the mass number m to the electric charged e of ions is 28, and the peak having the smallest half band width is in the range of 400 - 600° C in the spectrum. The nitrogen content calculated from the peak appearing at 400 eV ∀ 1.0 eV in the N1s shell bonding energy spectrum obtained by XPS measurement of this photocatalyst is at least 20 times larger than the nitrogen content obtained by chemical analysis.
Abstract:
A full spectrum light emitting lamp and one or more translucent base bodies surrounding the lamp are disposed in the lighting apparatus, the one or more translucent bas bodies having a photocatalytic reaction layer which bears a photocatalyst made of a titanium dioxide thin film therein, or the one or more translucent base bodies having the photocatalytic reaction layer which bears the photocatalyst made of the titanium dioxide thin film therein and having infrared light-absorbing functions, and a space through which air can flow is formed between the lamp and the translucent base body. Therefore, an ultraviolet light, a visible light and an infrared light can effectively be utilized according to characteristics such as an air purifying function of the ultraviolet light, a lighting function of the visible light, and a heating function of the infrared light to thereby save optical energy emitted from the lamp. Further, forced convection is generated in the air flow space by a heating effect of the infrared light emitted from the lamp in addition to a heating effect of the optical energy emitted from the lamp, so that the air can sufficiently be ventilated to promote an air purifying effect.
Abstract:
An even titanium oxide film is economically formed on the surface of a substrate. To actualize the film formation, an aqueous titanium tetrachloride solution containing 0.1 to 17% by weight of Ti is applied in a film-like state on the surface of a heat resistant substrate. While the liquid film state is kept as it is, the aqueous titanium tetrachloride solution is heated to 300°C or more and H 2 O and HCl in the liquid film are accordingly evaporated to form a titanium oxide film. In the case where the substrate is of aluminum inferior in acid resistance, an acid-resistant film such as an oxide film is previously formed on the surface of the metal substrate.