Hydrothermal Synthesis Method Producing Nano Tungsten Trioxide Material

Tungsten trioxide (WO3) has excellent electrochromic, photochromic, gasochromic and catalytic nature, in the flat panel display, smart windows, write - read - rub optical devices, gas sensors and fields have great potential catalyst application. Producing a specific composition and morphology of tungsten trioxide nanostructures to obtain a special performance, its application is important. In this work, hydrothermal synthesis method, were synthesized WO3·1 / 3H2O and hexagonal WO3 (h-WO3) nanorods, quadrature phase WO3 (o-WO3) and monoclinic WO3 (m-WO3) rectangular plate, and m-WO3 brick stack and WO3·1 / 3H2O star assembly, and carbide inserts to explore its mechanism. In addition, the synthesis of monodisperse acid nanoparticles will make by UV irradiation. Use the following UV irradiation generated acid nanoparticles in the hydrothermal environment successfully assembled into m-WO3 brick stack such nanostructures. In the study we found, WO3 and hydrates lower nanoparticles (particles, rods, sheets) has a clear self-assembled habits in the hydrothermal environment.

 

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Tungsten Alloy Radiation Shielding For DSA System

Tungsten alloy radiation shielding for DSA system is a tungsten alloy shielding used for digital subtraction angiography system. DSA system, also known as digital subtraction angiography system, is a new x-ray imaging system to clearly visualize blood vessels in a bony or dense soft tissue environment by computer. Images are produced using contrast medium by subtracting a ‘pre-contrast image’ or the mask from later images, once the contrast medium has been introduced into a structure. Compared to the conventional angiography system, images obtained by digital subtraction angiography system are more clearly and intuitively, even some fine vascular structures can be displayed.

Digital subtraction angiography system is suitable for the examination of heart and great vessels. It clearly shows the structural abnormality of heart anatomy, coronary, aortic coarctation, aortic dissection, aortic aneurysm, developmental anomaly of aorta, etc; and also clearly shows the cervical segment and intracranial arteries for diagnosing intracranial aneurysms, cervical artery stenosis or occlusion, vascular anomaly, arterial occlusion and for observation of intracranial tumor‘s feeding artery. In addition, digital subtraction angiography system can be used to check large blood vessels, abdominal aorta and its branches. At the same time, digital subtraction angiography system can also be used for the interventional treatment in all parts of the body lesions, such as interventional embolotherapy in treatment of liver cancer, cerebral aneurysms, Surface Milling Inserts cerebral arteriovenous malformation，and percutaneous balloon mitral valvuloplasty, percutaneous puncture biopsy.

Since digital subtraction angiography system is an X-ray angiography system basing upon image subtracting. And X rays can inhibit, destroy or even kill biologic cells, causing different degrees of changes in physiological, pathological and biochemical aspects of organism. Therefore, it is need to use a tungsten alloy radiation shielding to shield and absorb X rays when using the digital subtraction angiography system. Tungsten alloy radiation shielding for DSA system has excellent radiation shielding performance to shield radiation and avoid it damaging human body.

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Tungsten Disulfide Nanomaterials Applied in Energy Conversion and Storage

Due to the rapid growth of the global population and rapid socio-economic development, energy and environmental issues have received widespread attention. As a transition metal disulfide, tungsten disulfide nanomaterials have made important research advances in the field of energy conversion and storage. Given the versatility and rich microstructure of these materials, the plasticity and controlled synthesis of tungsten disulfide (WS₂) nanomaterials are of interest to researchers.

In recent decades, the problems of energy shortage and environmental pollution have become increasingly prominent. The development of sustainable clean energy and related technologies is considered to be a top priority for all countries. Since most sustainable clean energy sources are highly dependent on time, regional and weather factors, there is a need to develop relevant energy conversion and storage devices to efficiently store these intermittent energy sources.

In the field of energy conversion, electrocatalytic hydrogen evolution is considered a promising approach to developing renewable and clean energy sources. However, conventional electrocatalytic platinum catalysts face high costs and low reserves, which limit the development of electrocatalytic hydrogen evolution technology. In addition, photocatalytic hydrogen evolution or pollutant degradation as a new way to utilize solar energy has broad application and research prospects in solving energy and environmental problems.

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Ammonium Metatungstate Solubility

Ammonium metatungstate (AMT) is a white or light yellow crystalline salt that is soluble in water. Generally, ammonium metatungstate solubility refers to the solubility of AMT in water. The data shows that at 20 °C, the solubility of AMT in water is 303.9g, and its solubility increases with increasing temperature. Besides, the aqueous solution of AMT is quite stable.

Solid solubility (marked by S) refers to the mass of solute dissolved when a solid substance reaches saturation in 100g of solvent at a certain temperature. The solubility of ammonium metatungstate can be expressed as: S (AMT)=303.9 g/100gH2O.

ChinaTungsten Online has been developing, producing, and selling tungsten chemicals since the late 1990s. At present, AMT technology is stable, with high production capacity. And there are various specifications. We can provide you with high-quality ammonium metatungstate powders at competitive prices.

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