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Method for rapidly preparing BiOBr nanoflowers with assistance of water and application of BiOBr nanoflowers

A nano-flower, water-assisted technology, applied in the field of nano-materials, can solve problems such as unfavorable enlarged production, cumbersome post-processing, complicated process, etc., and achieve excellent visible light catalytic degradation of industrial dyes and antibiotics performance, short hydrolysis time, and simplified preparation process. Effect

Pending Publication Date: 2019-12-13
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the technical problems that the existing method for preparing BiOBr is complex in process, high in cost, cumbersome in post-processing, and unfavorable for scale-up production; and provides a method for preparing BiOBr nano way of flower

Method used

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  • Method for rapidly preparing BiOBr nanoflowers with assistance of water and application of BiOBr nanoflowers
  • Method for rapidly preparing BiOBr nanoflowers with assistance of water and application of BiOBr nanoflowers
  • Method for rapidly preparing BiOBr nanoflowers with assistance of water and application of BiOBr nanoflowers

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1: The water-assisted rapid preparation of BiOBr nanoflowers in this example is carried out through the following steps:

[0027] Step 1. Add 2mmol of bismuth nitrate pentahydrate to 32mL of ethylene glycol and stir for 0.5h, then add 2mmolHBr, stir thoroughly for 0.5h, then transfer to a high pressure reactor with polytetrafluoroethylene lining, and react at 200℃ for 0.5h. Cool at room temperature to obtain a clear solution;

[0028] Step 2. Then add 32 mL of water and immediately appear a white solid precipitate. The solid is separated by suction filtration, washed with water and absolute ethanol 3 times respectively, and dried at 60° C. to obtain BiOBr nanoflowers.

[0029] figure 1 X-ray powder diffraction test pattern of BiOBr nanoflower. It can be seen from the figure that the X-ray derived peak of the prepared solid powder is completely consistent with the standard card JCPDS: 09-0393, indicating that the obtained solid powder is pure BiOBr crystals. figure 2 ...

Embodiment 2

[0030] Example 2: The water-assisted rapid preparation of BiOBr nanoflowers in this example is carried out through the following steps:

[0031] Step 1. Add 2mmol of bismuth nitrate pentahydrate to 8mL of ethylene glycol and stir for 1h, then add 2mmol HBr, stir well for 1h, then transfer to a high pressure reactor with polytetrafluoroethylene lining, react at 120℃ for 2h, cool at room temperature Get a clear solution;

[0032] Step 2: Then add 4 mL of water and immediately appear a white solid precipitate. The solid is separated by suction filtration, washed with water and absolute ethanol 3 times, and dried at 80°C to obtain BiOBr nanoflowers.

Embodiment 3

[0033] Example 3: In this example, the water-assisted method for rapidly preparing BiOBr nanoflowers is carried out through the following steps:

[0034] Step 1. Add 2mmol of bismuth nitrate pentahydrate to 64mL of methanol and stir for 1h, then add 2mmol of NaBr, stir thoroughly for 0.5h, then transfer to an autoclave with polytetrafluoroethylene lining, react at 140℃ for 1h, and cool at room temperature. Clear solution

[0035] Step 2. Then add 128 mL of water and immediately appear a white solid precipitate. The solid is separated by suction filtration, washed with water and absolute ethanol 3 times respectively, and dried at 50°C to obtain BiOBr nanoflowers.

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Abstract

The invention discloses a method for rapidly preparing BiOBr nanoflowers with the assistance of water and application of the BiOBr nanoflowers, belonging to the field of synthesis of nanomaterials. The invention aims to solve the technical problems that conventional methods for preparing BiOBr is complex in process, high in cost, tedious in post-treatment and unfavorable for expanded production. According to the method, the BiOBr is rapidly prepared by adopting a two-step method with the assistance of water. The method comprises the following steps: adding bismuth nitrate pentahydrate into organic alcohol, carrying out sufficient stirring, adding a bromine source, continuing sufficient stirring, performing cooling after a solvothermal reaction to obtain a clear and transparent solution, then adding water to allow a white solid to quickly appear, filtering the obtained white solid, and cleaning and drying the white solid so as to obtain the BiOBr nanoflowers. The method has the advantages of simple preparation process, short reaction time, no need for addition of a surfactant, easiness in industrial production and the like.

Description

Technical field [0001] The invention belongs to the technical field of nano materials; in particular, it relates to a water-assisted method for rapidly preparing BiOBr nano flowers. Background technique [0002] Human society is developing rapidly in the 21st century, with great progress in science, technology and humanities, but at the same time, it has led to increasing conflicts between contemporary resources and the ecological environment. Sustainable development has become a path that contemporary society must choose. Photocatalytic technology is a green technology that can effectively solve the energy crisis and environmental pollution. It is powered by solar energy and has the advantages of cheap, clean, and abundant resources. How to effectively use solar energy is an important subject of scientific research in the 21st century. The development of efficient, stable, and low-cost photocatalysts has always been a research hotspot in the field of photocatalyst research. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C02F1/30C01G29/00C02F101/30C02F101/38C02F103/34
CPCB01J27/06C02F1/30C01G29/00C02F2101/306C02F2101/38C02F2305/10C02F2103/343C01P2004/03C01P2004/04C01P2004/30B01J35/39
Inventor 张显龙冯德鑫咸漠
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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