Tungsten trioxide nanoflake has potential application prospects in the treatment of organic dye contaminated water.
Why does tungsten trioxide nanoflake have potential application prospects in the treatment of organic dye pollution water?
The sewage discharge in China is large, and the sewage treatment rate in urban is only 30%, which means that a large amount of untreated sewage is discharged directly to become a secondary source of pollution to the environment, therefore most of the rivers, lakes and urban groundwater are suffering different degrees of pollution. Traditional water treatment methods in China, such as adsorption, coagulation, and activated sludge, have problems such as low efficiency, high cost, and secondary pollution. Therefore, it is urgent to find an economical and effective method for treating the residual refractory organic pollutants in water.
It is expected to make a major breakthrough in wastewater treatment technology in the near future with the application of photocatalytic technology in water treatment. And it has achieved significant results in wastewater treatment by using nano-semiconductor materials as photocatalyst. For example, titanium dioxide (TiO2) can be used in the photocatalytic degradation of dyes. But, there are limitations as TiO2 has a band gap of 3.2eV that can only absorb ultraviolet light with a wavelength shorter than 387nm. However, the proportion of ultraviolet light in sunlight is only about 3%, which means the utilization efficiency of light energy is low if TiO2 is adopted as photocatalyst. While the band gap energy of WO3 is about 2.5eV, which means WO3 has potential photocatalytic ability in visible light with a wavelength of less than 500nm. In a word, WO3 has potential application prospects in the treatment of organic dye pollution water.
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