Photocatalysts are chemical substances which do not change itself under the irradiation of light and can be used as a catalyst. 

Photocatalytic principle: After the photocatalyst is irradiated by light, the valence band electron on the semiconductor surface absorbs the light and is excited to the conduction band. 

Tungsten diselenide nanosheet is a kind of two-dimensional graphene-like material. Its main structure is composed of two layers of selenium atoms connected with a layer of tungsten atoms in the middle. This material is a hot research topic in the scientific community. 

With the rapid development of graphene, people get interested in two-dimensional materials. Among these two-dimensional materials, transition metal dihalide has attracted extensive attraction because the thin layer structure of its atom owns the properties of electricity, optics, plasma, electrochemistry and electrocatalysis. 

Analysis of latest tungsten market from ChinaTungsten Online

Affected by new round of environmental protection checks, sellers became more confidence and tended to stabilize offer levels. However, usual quiet trading activity and lowered tungsten forecast prices from large enterprises and associations still made trading deadlocked. 

Rare earth market quotation in China: domestic rare earth price continues to be stable earlier in this week due to deadlocked supply and demand, weak demand in off-peak season and thin trading. Insiders expect that some downstream factories will start to purchase gradually and that will help to rise prices. Sellers now are reluctant to sell, waiting for listing prices of large enterprises. 

Affected by environmental protection tightening the supply, Chinese molybdenum prices climb from last week. High production costs and increasing quantity in steel biddings boost market confidence. 

The widely-used scotch tape enabled material scientists to make new breakthroughs again and open up the new scientific revolution in the field of chemistry and materials manufacturing---extracting graphene, the first two-dimensional material.

Recently, President Donald Trump signed the John S. McCain National Defense Authorization Act (NDAA) for Fiscal Year 2019. What is NDAA? 

Red car, white handrail, colorful advertising board...Different things have different colors. Due to the existence of pigment, we can say goodbye to the world in which only black, white and grey exist. Molybdenum has various kinds of chemical performances. 

How to break the spell which makes sunshine room like furnace in summer and like the fridge in winter? The answer is transparent semiconductor materials. For example, tungsten oxide transparent insulation materials can let the sunshine room warm in winter and cool in summer!