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Application of an ultraviolet photocatalytic bromate removal material in water bromate removal

A bromate and water removal technology, applied in the direction 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 limited reaction, and large band gap and other issues to achieve the effects of high response efficiency, easy access, and wide application range

Active Publication Date: 2018-03-06
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.
The fluorine (F) and graphene (GR) co-doped modified titanium dioxide prepared by the present invention greatly improves the reaction performance, but there is no report on the use of this material to remove bromate

Method used

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  • Application of an ultraviolet photocatalytic bromate removal material in water bromate removal
  • Application of an ultraviolet photocatalytic bromate removal material in water bromate removal
  • Application of an ultraviolet photocatalytic bromate removal material in water bromate removal

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Embodiment 1

[0037] Step (1): Add graphene oxide (GO, Nanjing Xianfeng Nano XF003) into 60 mL of ethanol solution at room temperature 25 °C, and add 2.8 g of commercial titanium dioxide (Degussa P25) and hydrofluoric acid (HF ), the stirring speed is 300r / min, and the preliminary mixed solution is obtained; the preliminary mixed solution is alternately ultrasonicated and stirred every 15min (stirring speed is 300r / min), and the continuous operation is 2h, and the mixed solution is obtained;

[0038] The oxidation degree of graphene oxide is 35%, the carbon-oxygen ratio is 1.5-2, and the addition amount is 2.8 mg;

[0039] The mass percentage of hydrofluoric acid is 40%, and the added mass is 70.0 mg;

[0040] Step (2): Transfer the mixed solution to a stainless steel reactor with a polytetrafluoroethylene liner and perform a hydrothermal reaction at a reaction temperature of 180°C for 24 hours. After the reaction, it is naturally cooled to room temperature at 25°C to obtain a gray precurso...

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Abstract

The invention discloses the application of a material for ultraviolet photocatalytic removal of bromate in water. The material is obtained by modifying TiO2 with HF and graphene, and its molecular formula is FxGyT, where x is HF and TiO2. The mass percentage of molecules, y is the mass percentage of graphene oxide and TiO2 molecules. The specific application steps include: adding ultraviolet photocatalytic material for removing bromate in water to an aqueous solution containing bromate pollutants, first adsorbing in a dark state for 0.2 to 1 hour, and then performing ultraviolet irradiation. In the present invention, fluorine (F) and graphene (GR) are co-doped to modify titanium dioxide to obtain a material for ultraviolet photocatalytic removal of bromate in water, which can efficiently remove bromate in water under ultraviolet photocatalysis. The reaction conditions for removing bromate in the present invention are simple, the reaction can be effectively carried out at normal temperature, and the bromate in 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, which brings certain hidden dangers to drinking water safety. Studies have shown that Br - When the concentration is greater than 50 μg / L, bromate will be formed during ozone disinfection. In addition, hypochlorous acid, chloramine, and the combination of ozone and hypochlorous acid will lead to the formation of bromate. Studies have shown that adding potassium bromate to the drinking water of experimental mice will increase the chance of cancer, and it will also increase non-cancerous kidney cell tumors, thyroid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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
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