摘要:
A modified natural graphite material which provides a negative plate having improved adhesion between a negative electrode mixture and a current collector has a circularity of at least 0.92 and at most 1.0 and an incident angle dependence S60/0 of the peak intensity ratio of at least 0.5 and at most 0.7 as determined by measurement of C K-edge X-ray absorption spectra using synchrotron radiation as an excitation source. It preferably satisfies at least one of the following conditions: an absolute specific gravity of at least 2.25 (g/cm3), a tap density of at least 1.0 g/cm3 and at most 1.4 g/cm3, and linseed oil absorption of at least 20 cm3/100 g and at most 50 cm3/100 g. A carbonaceous material may adhere to at least a portion of the surface of the graphite particles.
摘要翻译:提供具有改善的负极混合物和集电体之间粘附性的负极板的改性天然石墨材料具有至少0.92至多1.0的圆形度,峰强度比的入射角依赖性S60 / 0至少为0.5 并且通过使用同步加速器辐射作为激发源的C K边缘X射线吸收光谱的测量来确定最多为0.7。 它优选满足以下条件中的至少一个:绝对比重至少为2.25(g / cm 3),振实密度为至少1.0g / cm 3和至多1.4g / cm 3,并且亚麻籽油吸收至少 20cm 3 / 100g和至多50cm 3 / 100g。 碳质材料可以粘附到石墨颗粒的表面的至少一部分上。
摘要:
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 no 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.
摘要翻译:通过将通过用含氮碱中和酸化钛化合物得到的氧化钛和/或氢氧化钛在大气中进行热处理来制造响应于可见光而具有高光催化活性的可见光的氧化钛光催化剂 含有可水解金属化合物(例如,卤化钛),然后在350℃或更高的温度下在含水量为0.5-4.0体积%的气体中进行额外的热处理。 作为含氮氧化钛的光催化剂在600℃以上的温度下,在通过热解吸光谱法获得的质量碎片光谱中没有显着的峰值,其中质量数m与电荷的比率m / e e的离子是28,并且具有最小半带宽的峰在光谱中在400-600℃的范围内。 在通过该光催化剂的XPS测定得到的N1s壳结合能谱中,以400eV±1.0eV出现的峰计算出的氮含量比通过化学分析获得的氮含量大至少20倍。
摘要:
A highly active titanium oxide photocatalyst of the type responsive to visible light is prepared by subjecting a titanium (hydr)oxide raw material obtained by neutralizing an acidic titanium compound in ammonia or an amine under conditions such that the final pH is 7 or below to heat treatment in an atmosphere containing a hydrolyzable compound followed by contact with water and additional heat treatment at a temperature of at least 350° C. The resulting titanium oxide photocatalyst comprises titanium oxide with a specific surface area of at most 120 m2/g and with the amount of surface hydroxyl groups being at least 600 μeq/g. Preferably the density of surface hydroxyl groups is at least 8 μeq/m2, and the ratio of the amount of terminal type hydroxyl groups (T) to the amount of bridge type hydroxyl groups (B) in the surface hydroxyl groups satisfies T/B≧0.20. This titanium oxide photocatalyst has an ESR spectrum having two types of triplet signal for which the g values of the main spectra are 1.993-2.003 and 2.003-2.011, respectively, and it is also identified by having ratios of the strengths of these signals before irradiation with visible light, under irradiation, and immediately after the stop of irradiation which are different from conventional products.
摘要:
Titanium oxide-based photocatalysts which contain a metal halide in titanium oxide and which are prepared from titanium oxide and/or its precursor, which may optionally be heat treated, by contact with a reactive gas containing a metal halide of the formula MXn or MOXn (wherein M=a metal, X=a halogen, and n=an integer) with heating stably develop a high photocatalytic activity with visible light irradiation. The photocatalysts may subsequently be stabilized by contact with water or by heat treatment, and/or promoted by contact with a heteropoly acid and/or an isopoly acid so as to include a metal complex in the titanium oxide. Photocatalysts prepared in this manner exhibit novel ESR features. The present invention also provides methods for preparing these photocatalysts, a photocatalyst dispersion and a photocatalytic coating fluid containing such a photocatalyst, and photocatalytic functional products and methods for their manufacture using the photocatalyst.
摘要:
Titanium oxide-based photocatalysts which contain a metal halide in titanium oxide and which are prepared from titanium oxide and/or its precursor, which may optionally be heat treated, by contact with a reactive gas containing a metal halide of the formula MXn or MOXn (wherein M=a metal, X=a halogen, and n=an integer) with heating stably develop a high photocatalytic activity with visible light irradiation. The photocatalysts may subsequently be stabilized by contact with water or by heat treatment, and/or promoted by contact with a heteropoly acid and/or an isopoly acid so as to include a metal complex in the titanium oxide. Photocatalysts prepared in this manner exhibit novel ESR features. The present invention also provides methods for preparing these photocatalysts, a photocatalyst dispersion and a photocatalytic coating fluid containing such a photocatalyst, and photocatalytic functional products and methods for their manufacture using the photocatalyst.
摘要:
A titanium oxide-based photocatalyst which can exhibit excellent photocatalytic properties in response to visible light while maintaining its inherent activity in response to ultraviolet light and which is suitable for mass production contains bismuth as a first additional metal component and at least one metal element selected from silicon, zirconium, aluminum, and hafnium as a second additional metal component in titanium oxide. The Bi/Ti atomic ratio is preferably at least 0.0001 and at most 1.0, the atomic ratio of the second additional metal to Ti is preferably at least 0.0001 and at most 0.8, and a portion of bismuth is preferably present in the form of lower valence (Bi2+ or Bi0). The presence of lower valence bismuth can be ascertained by XPS analysis.
摘要翻译:可以在可见光下表现出优异的光催化性能,同时保持其响应于紫外线的固有活性并且适合于批量生产的二氧化钛基光催化剂包含铋作为第一附加金属组分和至少一种选自 硅,锆,铝和铪作为氧化钛中的第二另外的金属组分。 Bi / Ti原子比优选为0.0001以上且1.0以下,第二附加金属与Ti的原子比优选为0.0001以上且0.8以下,铋的一部分优选以低价存在 (Bi 2+ +或Bi 0)。 低价铋的存在可以通过XPS分析来确定。
摘要:
A titanium oxide-based photocatalyst which can exhibit excellent photocatalytic properties in response to visible light while maintaining its inherent activity in response to ultraviolet light and which is suitable for mass production contains bismuth as a first additional metal component and at least one metal element selected from silicon, zirconium, aluminum, and hafnium as a second additional metal component in titanium oxide. The Bi/Ti atomic ratio is preferably at least 0.0001 and at most 1.0, the atomic ratio of the second additional metal to Ti is preferably at least 0.0001 and at most 0.8, and a portion of bismuth is preferably present in the form of lower valence (Bi2+ or Bi0). The presence of lower valence bismuth can be ascertained by XPS analysis.
摘要翻译:可以在可见光下表现出优异的光催化性能,同时保持其响应于紫外线的固有活性并且适合于批量生产的二氧化钛基光催化剂包含铋作为第一附加金属组分和至少一种选自 硅,锆,铝和铪作为氧化钛中的第二另外的金属组分。 Bi / Ti原子比优选为0.0001以上且1.0以下,第二附加金属与Ti的原子比优选为0.0001以上且0.8以下,铋的一部分优选以低价存在 (Bi2 +或Bi0)。 低价铋的存在可以通过XPS分析来确定。
摘要:
Titanium oxide-based photocatalysts which contain a metal halide in titanium oxide and which are prepared from titanium oxide and/or its precursor, which may optionally be heat treated, by contact with a reactive gas containing a metal halide of the formula MXn or MOXn (wherein M=a metal, X=a halogen, and n=an integer) with heating stably develop a high photocatalytic activity with visible light irradiation. The photocatalysts may subsequently be stabilized by contact with water or by heat treatment, and/or promoted by contact with a heteropoly acid and/or an isopoly acid so as to include a metal complex in the titanium oxide. Photocatalysts prepared in this manner exhibit novel ESR features. The present invention also provides methods for preparing these photocatalysts, a photocatalyst dispersion and a photocatalytic coating fluid containing such a photocatalyst, and photocatalytic functional products and methods for their manufacture using the photocatalyst.
摘要:
Modified natural graphite particles intended for forming a negative electrode material for a nonaqueous electrolyte secondary battery are characterized by having a circularity of at least 0.93 and at most 1.0 and a surface roughness of at most 1.5% with respect to the length of the particles. These modified natural graphite particles are obtained by a manufacturing method including a step of applying an impact force to natural graphite particles for pulverization and spheroidization to obtain intermediate particles having a circularity of at least 0.93 and at most 1.0, and a step of carrying out surface smoothing of the resulting intermediate particles by mechanical grinding treatment to obtain the modified natural graphite particles.