Lithium Tungsten Bronze Photocatalyst Preparation II

Taking into account the practicality of the photocatalyst in the decomposition of harmful substances, sunlight as the light source is indispensable. Wavelength irradiated to the surface of the sun at about 500nm has the maximum intensity of visible light, energy of wavelength at 400nm-750nm in the visible region is about 43% of the total energy of sunlight, so in order to efficiently utilize the solar spectrum, finding the catalyst with light visible effect has aroused people's attention. Kinds of photocatalysts with visible effect reported are still limited currently, so it is necessary to research and develop new photocatalyst with highly efficient visible light effect. Tungsten bronze compounds are a series of important inorganic compounds, tungsten ions exist as mixed valence state of W6 +, W5 + and W4 + in such compounds to make a balance in the overall charge. Rich crystal structure, the tunnel structure and this particular valence state lead to its excellent properties.

A kind of oxide containing lithium tungsten bronze structure as visible effect photocatalyst, the chemical formula of lithium tungsten bronze structure oxide is = Ba5LiFe0.5 (NbxTah) λ A. （0 <x <1） preparation steps of lithium tungsten bronze structure oxide are as follows: mix the 99.9% analytically pure chemicals of BaCO3, Li2CO3, Fe2O3, Nb205 and Ta2O5 as formula Ba5LiFe0.5Nb4.75Ta4. 75 O30, put into the mill pot, add zirconia balls and ethanol, milling for 2-8 hours, mix grinding, remove and dry through 200-mesh sieve; the resulting powder material calcine at 1175-1275 ℃, and incubate for 6-8 hours, cool to room temperature, and then pulverized by ball mill so that the particle size gets smaller to 2 μm, then the lithium tungsten bronze structure oxide powder Ba5LiFe0.5Ta9.5O30 is obtained, 0 <x <10. This method is simple, with low cost, photocatalys obtained has excellent catalytic performance, with effects of decomposing harmful chemical substances, organic biomass and bactericidal under visible light irradiation.

If you have any interest in our products, please feel free to contact us by email: sales@chinatungsten.comsales@xiamentungsten.com or by telephone:+86 592 5129696.