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Preparation method of Bi/Bi4O5X2(X is equal to Br, I) photocatalyst of organic boron oxide under visible light

A visible light and catalyst technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve problems such as unsatisfactory utilization of solar energy, achieve improved photocatalytic performance, improved photocatalytic activity, The effect of improving photocatalytic activity

Active Publication Date: 2018-01-19
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0005] In 2015, Mao et al. discovered the synthetic Bi 4 o 5 Br 2 Photocatalysts have stronger photocatalytic activity than BiOBr monomer in catalytic oxidation of resorcinol under the irradiation of visible light (Mao X, Xie F, Li M. Facile hydrolysis synthesis of novel Bi 4 o 5 Br 2 photocatalyst with enhanced visible light photocatalytic activity for the degradation of resorcinol[J].Materials Letters,2016,166:296-299.), in 2016 Xiao et al synthesized Bi by solvent method 4 o 5 I 2 Photocatalysts have stronger photocatalytic activity tha

Method used

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  • Preparation method of Bi/Bi4O5X2(X is equal to Br, I) photocatalyst of organic boron oxide under visible light
  • Preparation method of Bi/Bi4O5X2(X is equal to Br, I) photocatalyst of organic boron oxide under visible light
  • Preparation method of Bi/Bi4O5X2(X is equal to Br, I) photocatalyst of organic boron oxide under visible light

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[0044] Example 1

[0045] Use an analytical balance to weigh 3.7835g and 5.0477g bismuth nitrate pentahydrate respectively and dissolve in 40mL glycerol, weigh 0.476g potassium bromide and 0.664g potassium iodide and dissolve in 40mL glycerol, use a rubber tip dropper to dissolve the potassium iodide The solution of potassium bromide and potassium bromide were added dropwise to the glycerol solution of bismuth nitrate pentahydrate. After magnetic stirring at room temperature for 60 minutes, the mixed solution was transferred to the reactor and reacted in an oven at 160°C for 16 hours. And collect the precipitate. The precipitate was dried in an oven at 70°C for 12 hours. Weigh 0.3g of the reaction precursor obtained and add 50mL of distilled water, Bi / Bi at a water bath temperature of 50℃ 4 O 5 Br 2 Hydrolysis for 24h, Bi / Bi 4 O 5 I 2 Hydrolyze for 2h, dry the precipitate obtained from the reaction at 70℃ for 12h, the solid powder obtained is Bi / Bi 4 O 5 X 2 (X=Br,I) Bi-rich com...

Example Embodiment

[0046] Example 1 Obtained Bi / Bi 4 O 5 X 2 (X=Br,I) Bi-rich composite photocatalyst and single bismuth-rich photocatalyst Bi 4 O 5 X 2 (X = Br, I) various performance values ​​are listed in Table 1. It can be seen from the table that the Bi / Bi prepared in Example 1 4 O 5 Br 2 The specific surface area of ​​the catalyst is 164.35m 2 g -1 , Bi / Bi 4 O 5 I 2 The specific surface area of ​​the catalyst is 103.76m 2 g -1 , The removal efficiency of organoboron under visible light is Bi 4 O 5 X 2 (X=Br,I) 2 times the monomer.

[0047] The photocatalytic activity test in Table 1 was characterized by oxidizing under visible light to remove organoboron in the pressure return liquid. A 500W xenon lamp was used as the light source, and the visible light in the range of 420 to 780 nm was obtained after the filter. The catalyst dosage was 0.05g each , The original COD concentration of the organic boron solution is 210mg / L. After catalytic oxidation, the COD is measured with a water quality analy...

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Abstract

The invention relates to a preparation method of a Bi/Bi4O5X2(X is equal to Br, I) complex photocatalyst of organic boron in oxidation fracturing fluid under a visible light. The preparation method comprises the steps of dissolving a compound containing 7.8mmol and 10.4mmol of bismuth elements into glycerol, and then dissolving 4mmol of compound containing iodine and bromine elements into the glycerol respectively; adding the solution containing the iodine and bromine elements into the solution containing the bismuth elements respectively, and carrying out stirring reaction for 60min; transferring the mixed solution into a reaction kettle, reacting at 160 DEG C for 16h, and cleaning and drying to obtain a precursor; weighing 0.3g of precursor, adding 50ml of distilled water, carrying out hydrolysis at the water bath temperature of 50 DEG C, and drying to obtain solid powder which is the Bi/Bi4O5X2(X is equal to Br, I) complex photocatalyst. The prepared catalyst has improved response to the visible light, especially has higher activity on removing the organic boron in the fracturing fluid, and can be applied to removing the organic boron in the fracturing fluid.

Description

technical field [0001] The invention relates to two kinds of catalysts, in particular to two kinds of bismuth-rich composite photocatalysts used in photooxidative fracturing flowback fluid of organoboron, in particular to two kinds of visible light response catalysts used in photocatalytic oxidation of organic boron in fracturing flowback fluid Bi / Bi 4 o 5 x 2 (X=Br, I) composite photocatalyst preparation method and application thereof. Background technique [0002] With the vigorous development of my country's industry, people's work on energy exploitation is deepening, and the collection and treatment of fracturing flowback fluid produced in the process of shale gas exploitation is a technical problem we face. The composition of the fracturing flowback fluid is complex. In addition to the main cross-linking agent organic boron, there are also various organic additives such as the thickener guar gum, the fungicide quaternary ammonium salt, the drainage aid polyethoxylami...

Claims

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Application Information

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IPC IPC(8): B01J27/06C02F1/72C02F101/30C02F103/10
Inventor 白杨杨萍叶立群王平全石晛邓嘉丁宋丹周鹏王建龙
Owner SOUTHWEST PETROLEUM UNIV
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