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Mo Doped Violet Tungsten Oxide 368

Mo doped violet tungsten oxide, or Mo-W18O49, can be synthesized by hydrothermal method. The Mo-W18O49 can be applied as the catalyst in manufacturing hydrogen with a very high activity. Why does molybdenum doping can increase the hydrogen activity of Mo-W18O49? After doping Mo, violet tungsten oxide, as a catalyst, whose hydrogen production activity is improved because the doping of Mo increases the active sites of catalyst, since the approximate 3D microstructure composed of one-dimensional nanowire can not only help electronic…

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V-doped Violet Tungsten Oxide 359

V-doped violet tungsten oxide, or V doped violet tungsten oxide, is doping V (vanadium) into VTO (W18O49) nanowire lattice structure to generate doped W18O49 nanowire. Some studies indicate that V doped violet tungsten oxide can be directly synthesized by solvothermal method, using tungsten hexachloride (WCl6) as tungsten source and NH4VO3 as dopant. Studies have shown that the gas sensor made of V-doped tungsten oxide nanowire has obvious sensitive response at room temperature and good stability response to the nitrogen dioxide…

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Doped Violet Tungsten Oxide 351

Doped violet tungsten oxide (VTO, W18O49) is the VTO product obtained by doping modification with a better property, like gas sensitive, catalyzing and others. Studies have indicated that doping is the excellent method to modify W18O49. The common seen doped violet tungsten oxides are V-doped violet tungsten oxide, Mo doped violet tungsten oxide and Ti doped violet tungsten oxide. They show their own unique properties as the doping elements are different. Here are a few examples, as listed below: 1.…

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Doping Blue Tungsten Oxide 342

Doping blue tungsten oxide, or doped blue tungsten oxide, is the β-tungsten oxide doped with small amounts of other elements to enhance its properties, such as K2O, SiO2, and Al2O3. The role of additives is the recombination action of Si-Al-K. Si-Al will promote the formation of β-W. K enters the lattice of W, under high temperature calcination, residue of K in tungsten rod will improve the non-sag performance of tungsten wire. Doping element changes the chemical component of blue tungsten…

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High Purity Blue Tungsten Oxide 319

In theory, high purity blue tungsten oxide (BTO) refers to the β-tungsten oxide with a very high purity of 99.99% and above. The quality of tungsten products is getting more and more attention with the constant rise of high and new technology. According to the tungsten products on the performance of genetic, high purity of blue tungsten oxide will directly contribute to the high purity requirements of downstream products. The industrial blue tungsten oxide mainly consists of several tungsten oxides…

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Doped Yellow Tungsten Oxide 386

Doped yellow tungsten oxide, also known as doped tungsten trioxide, is a good catalyst. Compared with the common yellow tungsten oxide, the photoelectric conversion efficiency and photoelectric catalytic activity of the doped tungsten trioxide have been improved. For example, Fe is doped to form Fe2O3 and Fe3+ can capture the photo electron, which inhibits the recombination of electron and hole. Doping is an important method. It can improve the efficiency of photoelectric conversion and the ability of photoelectric catalysis. Doped…

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Fine Tungsten Carbide Powder 388

Fine Tungsten carbide powder has high purity, uniform particle size and good dispersibility. It has the surface electronic properties of platinum, which can be used as a catalyst in some organic reactions. Preparation Use metal tungsten powder and carbon black as raw materials, mixture in a certain proportion, the mixture into graphite boat, placed on a carbon tube furnace or high sense of intermediate frequency electric furnace, carbonized under a certain temperature, then through ball mill, screening. Finally, fine tungsten…

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Tungsten Carbide Powder 388

The chemical formula of tungsten carbide powder is WC. It is a good electric conductor with stable chemical properties. It is suitable for machining at high temperature and is the main raw material for the production of cemented Carbide. Characteristic Tungsten carbide powder is a black hexagonal crystal, with metallic luster, similar hardness to diamond, good conductor for electricity and heat. Melting point is 2870 ℃, the boiling point is 6000 ℃, the relative density is 15.63 (18 ℃). The…

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High-purity Yellow Tungsten Oxide 391

High-purity yellow tungsten oxide, also known as high-purity tungsten trioxide, is a kind of yellow powder with high main content (WO3), low impurity content and excellent physicochemical properties compared with conventional yellow tungsten oxide. High-purity Yellow Tungsten Oxide Producing Process Yellow tungsten oxide prepared by the following process has the characteristics of fine granularity, high purity and good stability. 1. Adjust pH of sodium tungstate solution to 4~8 by using organic or inorganic acid. After hydrothermal reaction 12 hours, filtration,…

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High-purity Violet Tungsten Oxide 322

High-purity violet tungsten oxide, high-purity VTO for short, is a kind of violet powder with very high main content and very low impurity content. Its chemical formula is WO2.72 or W18O49. High-purity material refers to a new type of material with high chemical purity, low impurity content, and excellent physical and chemical properties compared with conventional materials. It is obtained by modern metallurgy technology under a super-clean environment. With the continuous improvement of material purity, it will further reveal the…

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