Tungsten Oxide

In recent years, photocatalytic degradation technology has been paid more and more attention to the treatment of environmental pollution. Photocatalytic treatment of pesticide wastewater is considered to be an ideal method from energy consumption and effect. The tungstate photocatalyst is well received by people for its energy saving, high efficiency, easy operation, wide application range, thorough degradation of pollutants and no secondary pollution. Herbicide pesticide is widely used, because of its rapid effect, easy to use, has played an important role in weed management, however, with the increasing mechanization of farming, excessive use of herbicides has also begun to remain in the arable land, causing environmental pollution. Studies have shown that herbicides can cause chronic damage to humans and animals through the food chain, showing potential carcinogenic and genetic mutations, which is by no means alarmist, and the harmless degradation of herbicide wastewater is

Sol-gel method is first used for glass and ceramic production, it refers to metal inorganic compounds, metal organic compounds or a mixture of the two under the action of surfactants. The process of preparing tungstate by the process of sol-gel and drying, roasting and other heat treatment process. Modern sol-gel method is mainly used to prepare nano film coating, for example, in optical field, some kind of optical film (such as high reflectivity film, low reflectivity film and waveguide film) is often needed. Sol-gel method can prepare nano tungstate by controlling the temperature, colloid composition, particle size of precursor and pH value in liquid. The advantage of sol-gel method is that: 1. The chemical homogeneity is good. Because the sol is prepared by the solution in the process of sol-gel, the chemical composition between the colloidal particles and the colloidal particles is exactly the same. 2. High purity; 3. Particle size is less than 0.1 um. 4. This method c

In recent years, photocatalytic degradation technology has been paid more and more attention to the treatment of environmental pollution. Photocatalytic treatment of pesticide wastewater is considered to be an ideal method from energy consumption and effect. The tungstate photocatalyst is well received by people for its energy saving, high efficiency, easy operation, wide application range, thorough degradation of pollutants and no secondary pollution. Bismuth tungstate is also a kind of tungstate. Since 1999, it has been reported that bismuth tungstate Bi 2 WO 6  has photocatalytic activity after visible light radiation at wavelengths greater than 420 nm. Bi 2 WO 6  can be excited by visible light and has a high catalytic activity under visible light due to its narrow bandgap width (about 2.7eV) and become a new addition to photocatalytic materials. Some scholars have found in the visible light response Bi 2 WO 6  can effectively degrade harmful substances such as ch

Expansion and contraction is a common physical phenomenon. However, there are some materials do not follow the routines, showing the opposite nature of the heat shrinkage, this phenomenon is called "negative thermal expansion", these materials are collectively referred to as negative thermal expansion materials. In the industrial field, the traditional commonly used negative thermal expansion materials are aluminum, titanium, zirconium, synthetic resin, zirconium tungstate is ammonium paratungstate and zirconium oxychloride synthesis of products, it's a new kind of material with negative thermal expansion coefficients over conventional materials. The study shows that zirconium tungstate ZrW 2 O 8  is a kind of negative thermal expansion material with excellent properties, zirconium tungstate has cubic appearance at normal temperature. It has stable negative thermal expansion performance in the whole range of temperature range from 0.3 to 1050.0K, the neg