Application of material for removing bromate in water through ultraviolet photocatalysis in removal of bromate in water
A bromate and water removal technology, applied in the directions of light water/sewage treatment, oxidized water/sewage treatment, water/sewage treatment, etc., can solve the problem of easy recombination of photogenerated electron holes, efficient reaction limitation, and large forbidden band width. and other problems, to achieve the effect of efficient reaction, easy access and wide application range
Active Publication Date: 2016-07-20
ZHEJIANG UNIV
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Problems solved by technology
[0004] As a typical photocatalyst, titanium dioxide is widely used in all walks of life, but it has a large band gap, and the photogenerated electron-hole pairs are easy to recombine, which greatly limits the efficient progress of the reaction.
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Embodiment 1
[0037] Step (1): Add graphene oxide (GO, Nanjing Xianfeng Nano XF003) to 60mL ethanol solution at room temperature 25℃, add 2.8g commercial titanium dioxide (Degussa P25) and hydrofluoric acid (HF) while stirring. ), the stirring speed is 300r / min to obtain the preliminary mixed solution; the preliminary mixed solution is alternately ultrasonicated and stirred every 15 minutes (the stirring speed is 300r / min), and the operation is continued for 2 hours to obtain the mixed solution;
[0038] The oxidation degree of graphene oxide is 35%, the carbon-oxygen ratio is 1.5-2, and the addition amount is 2.8mg;
[0039] The mass percentage of hydrofluoric acid is 40%, and the added mass is 70.0mg;
[0040] Step (2): Transfer the mixed solution to a stainless steel reactor containing polytetrafluoroethylene lining and carry out a hydrothermal reaction at a reaction temperature of 180°C for 24 hours. After the reaction, cool to room temperature 25°C naturally to obtain a gray precursor body. ...
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Abstract
The invention discloses an application of a material for removing bromate in water through ultraviolet photocatalysis in removal of bromate in water. The material is obtained through modifying titanium dioxide (TiO2) with hydrofluoric acid (HF) and graphene and has a molecular formula of FxGyT, wherein x is a numerator of the mass percentage of HF and TiO2, and y is a numerator of the mass percentage of graphene oxide and TiO2. The application particularly comprises the steps: adding the material for removing the bromate in the water through ultraviolet photocatalysis into an aqueous solution containing bromate pollutants, carrying out dark adsorption for 0.2-1 h, and then carrying out ultraviolet irradiation. Fluorine (F) and graphene (GR) are co-doped to modify TiO2 to obtain the material for removing the bromate in the water through ultraviolet photocatalysis, so that the bromate in the water can be efficiently removed under ultraviolet photocatalysis. The reaction conditions for removing the bromate are simple, the reaction can be effectively carried out at room temperature, and the bromate in the water can be effectively removed.
Description
Technical field [0001] The invention relates to the field of materials for removing bromate in water, in particular to the application of a material for removing bromate in water by ultraviolet photocatalysis in removing bromate in water. Background technique [0002] At present, ozone oxidation or disinfection technology is widely used in water treatment, especially in some high-quality water production fields, but it may produce bromate disinfection by-products and bring certain hidden dangers to drinking water safety. Research shows that Br - When the concentration is greater than 50μg / L, bromate will be formed in the ozone disinfection process. In addition, hypochlorous acid, chloramine, and the combined use of ozone and hypochlorous acid will all lead to the formation of bromate. Studies have shown that adding potassium bromate to the drinking water of experimental mice increases the chance of cancer, and also increases non-cancerous kidney cell tumors, thyroid and peritonea...
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IPC IPC(8): B01J27/135C02F1/32C02F1/72
CPCC02F1/32C02F1/725B01J27/135C02F2305/10C02F2101/12B01J35/40B01J35/39
Inventor 张燕李玲丹刘宏远
Owner ZHEJIANG UNIV