A kind of preparation method of c-doped biobr microsphere photocatalyst

A photocatalyst and microsphere technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effects of simple method, abundant active sites, and low cost

Active Publication Date: 2022-06-14
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the C-doping of Bi-based photocatalysts usually requires energy-intensive processes such as calcination, and relatively expensive organic solvents as the reaction environment.

Method used

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  • A kind of preparation method of c-doped biobr microsphere photocatalyst
  • A kind of preparation method of c-doped biobr microsphere photocatalyst
  • A kind of preparation method of c-doped biobr microsphere photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 A C-doped BiOBr microsphere photocatalyst preparation method, refers to a constant temperature high-speed dispersion at a temperature of 20 °C, the 0.5L bismuth salt solution is slowly added to the 1L sodium alginate dispersion, high-speed dispersion for 5 min; Then slowly add 0.1 L bromine solution to the system under high-speed dispersion, and disperse at high speed for 5 min; The reaction system was then transferred to the high-pressure reactor and hydrothermal reaction at 50 °C for 24 h to obtain the product; The product was separated by extraction filtration, repeatedly washed with distilled water, and dried overnight at 50 °C to obtain a C-doped BiOBr microsphere photocatalyst.

[0030] Wherein: bismuth salt solution refers to the 0.3 g bismuth salt dissolved in 10 mL volume concentration of 10 wt% nitric acid solution, mixed evenly to obtain.

[0031] Sodium alginate (SA) dispersion refers to the dispersion of 0.2 g of sodium alginate in a 10 mL volume conc...

Embodiment 2

[0033]Example 2 A method for preparing a C-doped BiOBr microsphere photocatalyst, refers to a 3.0L bismuth salt solution slowly added to the 1L sodium alginate dispersion under the condition of constant temperature high-speed dispersion at a temperature of 5 °C, and the high-speed dispersion is 50 min; Then slowly add 1.0L bromine solution to the system under high-speed dispersion, and disperse at high speed for 50 min; The reaction system was then moved into a high-pressure reactor and hydrothermal reaction at 300 °C for 6 h to obtain the product; The product was separated by suction filtration, repeatedly washed with distilled water for 9 times, and dried overnight at 200 °C to obtain a C-doped BiOBr microsphere photocatalyst.

[0034] Wherein: bismuth salt solution refers to the 3.0 g bismuth salt dissolved in 50 mL volume concentration of 10 wt% acetic acid solution, mixed evenly to obtain.

[0035] Sodium alginate (SA) dispersion refers to the dispersion of 2.0 g of sodium al...

Embodiment 3

[0037] Example 3 A method for preparing a C-doped BiOBr microsphere photocatalyst, refers to a 2.0L bismuth salt solution slowly added to the 1L sodium alginate dispersion solution under the condition of constant temperature high-speed dispersion at a temperature of 10 °C, and then slowly added 0.5L bromine solution to the system under high-speed dispersion, and dispersed at high speed for 25 min; The reaction system was then transferred to a high-pressure reactor and hydrothermal reaction at 150 °C for 15 h to obtain the product; The product was separated by suction filtration, repeatedly washed with distilled water for 6 times, and dried overnight at 120 °C to obtain a C-doped BiOBr microsphere photocatalyst.

[0038] Wherein: bismuth salt solution refers to the 1.5 g bismuth salt dissolved in 30 mL volume concentration of 10 wt% propionic acid solution, mixed evenly to obtain.

[0039] Sodium alginate (SA) dispersion refers to the dispersion of 1.0 g of sodium alginate in a 30m...

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Abstract

The invention relates to a preparation method of C-doped BiOBr microsphere photocatalyst. The method refers to: slowly adding a bismuth salt solution into a sodium alginate dispersion under constant temperature and high-speed dispersion conditions, and dispersing at a high speed for 5 to 50 minutes; Slowly add bromine salt solution to the system under high-speed dispersion, and disperse at high speed for 5-50 minutes; then move the reaction system into a high-pressure reactor for hydrothermal reaction to obtain the product; the product is separated by suction filtration, washed repeatedly with distilled water, and dried Overnight, the C-doped BiOBr microsphere photocatalyst was obtained. The C-doped BiOBr microsphere photocatalyst synthesized by one-step hydrothermal reaction in the present invention has simple method and low cost, and the prepared C-doped BiOBr microsphere photocatalyst has good catalytic degradation performance on TC under simulated sunlight, It has a good application prospect in the field of photocatalytic degradation of antibiotic wastewater.

Description

Technical field [0001] The present invention relates to the field of micro-nano materials technology and the field of photocatalytic technology, in particular to a C-doped BiOBr microsphere photocatalyst preparation method. Background [0002] The problem of water pollution has a direct impact on human production and life. At present, methods such as adsorption, electrocatalysis, membrane separation, and biodegradation are widely used in the treatment of water pollution. At the same time, as a new type of water pollution treatment method, photocatalytic degradation method has shown excellent characteristics such as high efficiency, low energy consumption and sustainability in the field of water treatment. The above characteristics have attracted widespread attention from relevant scholars. Among them, Bi-based semiconductor photocatalyst is a new type of photocatalytic material with excellent photocatalytic effect. Most of these catalysts have a unique layered structure and good ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06B01J35/08C02F1/30C02F101/38C02F103/34
CPCB01J27/06B01J35/004B01J35/08C02F1/30C02F2101/38C02F2305/10C02F2103/343
Inventor 王荣民张展程张亚萍何玉凤王雪雪
Owner NORTHWEST NORMAL UNIVERSITY
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