Doped titanium niobate is provided, which has a chemical structure of Ti.sub.(1-x)M1.sub.xNb.sub.(2-y)M2.sub.yO.sub.(7-z)Q.sub.z or Ti.sub.(2-x)M1.sub.xNb.sub.(10-y)M2.sub.yO.sub.(29-z)Q.sub.z, wherein M1 is Li, Mg, or a combination thereof; M2 is Fe, Mn, V, Ni, Cr, or a combination thereof; Q is F, Cl, Br, I, S, or a combination thereof; 0x0.15; 0y0.15; 0.01z2; 0x0.3; 0y0.9; and 0.01z8.

Embodiments disclosed herein relate to using cobalt (Co) to fine tune the magnetic properties, such as permeability and magnetic loss, of nickel-zinc ferrites to improve the material performance in electronic applications. The method comprises replacing nickel (Ni) with sufficient Co.sup.+2 such that the relaxation peak associated with the Co.sup.+2 substitution and the relaxation peak associated with the nickel to zinc (Ni/Zn) ratio are into near coincidence. When the relaxation peaks overlap, the material permeability can be substantially maximized and magnetic loss substantially minimized. The resulting materials are useful and provide superior performance particularly for devices operating at the 13.56 MHz ISM band.

Disclosed herein are magnetic nanoparticles, compositions and kits comprising the magnetic nanoparticles, methods of making the magnetic nanoparticles, and methods of using the magnetic nanoparticles to enrich biological targets.

An iron-based oxide magnetic particle powder has a narrow particle size distribution a small content of fine particles that do not contribute to magnetic recording characteristics, and a narrow coercive force distribution, to enhance magnetic recording medium density. Neutralizing an aqueous solution containing a trivalent iron ion and an ion of the metal substituting a part of the Fe sites by adding an alkali to make pH of 1.5 or more and 2.5 or less, adding a hydroxycarboxylic acid, and further neutralizing by adding an alkali to make pH of 8.0 or more and 9.0 or less are performed at 5 C. or more and 25 C. or less. A formed iron oxyhydroxide precipitate containing the substituting metal element is rinsed with water, then coated with silicon oxide, and then heated thereby providing e-type iron-based oxide magnetic particle powder. The rinsed precipitate may be subjected to a hydrothermal treatment.

The present invention relates to a precursor of a hydrogenation catalyst of carbon dioxide, a method for preparing thereof, a hydrogenation catalyst of carbon dioxide, and a method for preparing thereof. An embodiment of the present invention provides a precursor of a hydrogenation catalyst of carbon dioxide comprising CuFeO.sub.2.

The present invention provides a positive-electrode active material for non-aqueous secondary battery comprising a sodium transition metal composite oxide represented by Formula:
Na.sub.xFe.sub.1-yM.sub.yO.sub.2, wherein 0.4x0.7, 0.25y<1.0, and M is at least one element selected from the group consisting of manganese, cobalt and nickel, the sodium transition metal composite oxide having a crystal structure substantially composed of P6.sub.3/mmc alone.

A layered double hydroxide is represented by the following formula (I): Ni.sup.2+.sub.1?(x+y+z)Fe.sup.3+.sub.xV.sup.3+.sub.yCo.sup.3+.sub.z(OH).sub.2A.sup.n?.sub.(x+y+z)/n.Math.mH.sub.2O . . . (I). In one embodiment, in the formula (I), (x+y+z) is from 0.2 to 0.5, x represents more than 0 and 0.3 or less, y represents from 0.04 to 0.49, and z represents more than 0 and 0.2 or less.

High quality silver-iron titanate nanoparticles are synthesized using an ilmenite source. The silver-iron titanate nanoparticles were characterized using various analytical techniques. As compared to prior art methods, the disclosed methods provide for the simple, cost-effective synthesis of relatively high-quality silver-iron titanate nanoparticles. The silver-iron titanate nanoparticles can be used in a variety of important agricultural, industrial, and hygienic uses, including in the important area of plant tissue culture explant sterilization.

An anode material for a secondary battery is provided. The anode material for the secondary battery includes a metal oxide containing four or more than four elements, or an oxide mixture containing four or more than four elements. The metal oxide includes cobalt-copper-tin oxide, silicon-tin-iron oxide, copper-manganese-silicon oxide, tin-manganese-nickel oxide, manganese-copper-nickel oxide, or nickel-copper-tin oxide. The oxide mixture includes the oxide mixture containing cobalt, copper and tin, the oxide mixture containing silicon, tin and iron, the oxide mixture containing copper, manganese and silicon, the oxide mixture containing tin, manganese and nickel, the oxide mixture containing manganese, copper and nickel, or the oxide mixture containing nickel, copper and tin.

An anode material for a secondary battery is provided. The anode material for the secondary battery includes a metal oxide containing four or more than four elements, or an oxide mixture containing four or more than four elements. The metal oxide includes cobalt-copper-tin oxide, silicon-tin-iron oxide, copper-manganese-silicon oxide, tin-manganese-nickel oxide, manganese-copper-nickel oxide, or nickel-copper-tin oxide. The oxide mixture includes the oxide mixture containing cobalt, copper and tin, the oxide mixture containing silicon, tin and iron, the oxide mixture containing copper, manganese and silicon, the oxide mixture containing tin, manganese and nickel, the oxide mixture containing manganese, copper and nickel, or the oxide mixture containing nickel, copper and tin.