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 abundant active sites, simple method and low cost

Active Publication Date: 2020-02-21
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • 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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  • Preparation method of C-doped BiOBr microsphere photocatalyst
  • Preparation method of C-doped BiOBr microsphere photocatalyst
  • Preparation method of C-doped BiOBr microsphere photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 A preparation method of C-doped BiOBr microsphere photocatalyst refers to slowly adding 0.5L of bismuth salt solution into 1L of sodium alginate dispersion under the condition of constant temperature and high-speed dispersion at a temperature of 20°C, and dispersing at high speed 5 min; then slowly add 0.1L bromide salt solution to the system under high-speed dispersion, and disperse at high speed for 5 min; then move the reaction system into a high-pressure reactor, and conduct a hydrothermal reaction at 50°C for 24 h to obtain the product; Separation by filtration, repeated washing with distilled water for 3 times, and drying at 50°C overnight to obtain C-doped BiOBr microsphere photocatalyst.

[0030] Among them: bismuth salt solution refers to dissolving 0.3 g of bismuth salt in 10 mL of nitric acid solution with a volume concentration of 10 wt%, and mixing them evenly.

[0031]Sodium alginate (SA) dispersion was obtained by dispersing 0.2 g of sodium algi...

Embodiment 2

[0033] Example 2 A preparation method of C-doped BiOBr microsphere photocatalyst refers to slowly adding 3.0L of bismuth salt solution into 1L of sodium alginate dispersion under the condition of constant temperature and high-speed dispersion at a temperature of 5°C, and then dispersed at a high speed. 50 min; then slowly add 1.0L bromide salt solution to the system under high-speed dispersion, and disperse at high speed for 50 min; then move the reaction system into a high-pressure reactor, and conduct a hydrothermal reaction at 300°C for 6 h to obtain the product; Separation by filtration, repeated washing with distilled water for 9 times, and drying at 200°C overnight to obtain C-doped BiOBr microsphere photocatalyst.

[0034] Among them: bismuth salt solution refers to dissolving 3.0 g of bismuth salt in 50 mL of acetic acid solution with a volume concentration of 10 wt%, and mixing evenly.

[0035] Sodium alginate (SA) dispersion was obtained by dispersing 2.0 g of sodium...

Embodiment 3

[0037] Example 3 A preparation method of C-doped BiOBr microsphere photocatalyst refers to slowly adding 2.0L of bismuth salt solution into 1L of sodium alginate dispersion under the condition of constant temperature and high-speed dispersion at a temperature of 10°C, and the high-speed dispersion 25min; then slowly add 0.5L bromine salt solution to the system under high-speed dispersion, and disperse at high speed for 25 minutes; then move the reaction system into a high-pressure reactor, and conduct a hydrothermal reaction at 150°C for 15 hours to obtain the product; the product is filtered by suction Separation, repeated washing with distilled water for 6 times, and drying at 120°C overnight to obtain C-doped BiOBr microsphere photocatalyst.

[0038] Among them: bismuth salt solution refers to dissolving 1.5 g of bismuth salt in 30 mL of propionic acid solution with a volume concentration of 10 wt%, and mixing them evenly.

[0039] Sodium alginate (SA) dispersion is obtaine...

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Abstract

The invention relates to a preparation method of a C-doped BiOBr microsphere photocatalyst. The method comprises the following steps: under constant-temperature high-speed dispersion conditions, slowly adding a bismuth salt solution into a sodium alginate dispersion solution, and carrying out dispersing at a high speed for 5-50 minutes; slowly adding a bromine salt solution into the system under ahigh-speed dispersion condition, and carrying out high-speed dispersion for 5-50 minutes; then transferring the reaction system into a high-pressure reaction kettle for a hydrothermal reaction so asto obtain a product; and subjecting the product to suction filtration separation, repeated washing with distilled water, and drying overnight to obtain the C-doped BiOBr microsphere photocatalyst. TheC-doped BiOBr microsphere photocatalyst is synthesized through a one-step hydrothermal reaction; the method is simple in process and low in cost; and the prepared C-doped BiOBr microsphere photocatalyst has good catalytic degradation performance on TC under simulated sunlight and has good application prospects in the field of photocatalytic degradation of antibiotic wastewater.

Description

technical field [0001] The invention relates to the technical field of micro-nano materials and photocatalysis, in particular to a preparation method of C-doped BiOBr microsphere photocatalyst. Background technique [0002] Water pollution directly affects 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 has shown excellent characteristics such as high efficiency, low energy consumption, and sustainability in the field of water treatment. The above characteristics have attracted extensive attention of 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 light absorption ability. At the same tim...

Claims

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Application Information

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Patent Type & Authority Applications(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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