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High-adsorption bismuth oxyiodide visible-light-driven photocatalyst and application thereof

A technology of bismuth oxyiodide and visible light, applied in the field of new materials, can solve the problems of limiting bismuth oxyhalide, high recombination rate of photogenerated holes and photogenerated electrons, low light absorption efficiency of pure-phase bismuth oxyhalide, etc., so as to reduce production costs. , The effect of simplifying the preparation process

Active Publication Date: 2021-09-03
NANTONG TEXTILE & SILK IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, bismuth oxyhalide has been initially applied in wastewater and waste gas treatment, antibacterial, and hydrogen production by hydrolysis. This in turn limits the application of bismuth oxyhalides to a large extent

Method used

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  • High-adsorption bismuth oxyiodide visible-light-driven photocatalyst and application thereof
  • High-adsorption bismuth oxyiodide visible-light-driven photocatalyst and application thereof
  • High-adsorption bismuth oxyiodide visible-light-driven photocatalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0042] A solution is composed of bismuth nitrate pentahydrate, glacial acetic acid and ethanol, the ratio of which is 1:1.2:2.4 (molar mass: volume: volume); A solution is obtained after uniform dissolution; 0.04M povidone-iodine aqueous solution is configured, namely B solution .

[0043]Add solution A to solution B dropwise, control the molar ratio of bismuth and iodine to be 1:3, and obtain a uniform mixed solution through continuous stirring overnight at room temperature; transfer the mixed solution to a three-necked flask, install the condensing reflux device and Stirring device, placed in a constant temperature oil bath, control the reaction temperature at 60°C, the reaction time is 6h, after cooling, centrifuge, wash with deionized water and absolute ethanol respectively, and dry the reaction product in an oven at 80°C 8h. The photocatalyst of bismuth oxyiodide with high adsorption was obtained by careful grinding with a mortar.

[0044] The high-adsorption ultrafine ...

Embodiment example 2

[0046] A solution is composed of anhydrous bismuth chloride, 1mol / L dilute hydrochloric acid and isopropanol, the ratio is 1:2:6 (molar mass: volume: volume); A solution is obtained after uniform dissolution; configure 0.1M polydimensional Ketone-iodine aqueous solution, that is, B solution.

[0047] Add solution A to solution B dropwise, control the molar ratio of bismuth and iodine to be 1:1, and keep stirring overnight at room temperature to obtain a uniform mixed solution; transfer the mixed solution to a three-necked flask, install the condensing reflux device and Stirring device, placed in a constant temperature oil bath, control the reaction temperature at 80°C, the reaction time is 6h, after cooling, centrifuge, wash with deionized water and absolute ethanol respectively, and dry the reaction product in an oven at 90°C 6h. The photocatalyst of bismuth oxyiodide with high adsorption was obtained by careful grinding with a mortar.

[0048] The high-adsorption ultrafine...

Embodiment example 3

[0050] A solution is composed of bismuth acetate, glacial acetic acid and ethylene glycol, and its ratio is 1:3:8 (molar mass: volume: volume); A solution is obtained after uniform dissolution; 0.2M povidone-iodine aqueous solution is prepared, that is, B solution .

[0051] Add solution A dropwise to solution B, control the molar ratio of bismuth and iodine to 1:4, and keep stirring overnight at room temperature to obtain a uniform mixed solution; transfer the mixed solution to a three-necked flask, and install the condensing reflux device and a stirring device, placed in a constant temperature oil bath, control the reaction temperature at 90°C, and the reaction time is 6h. After cooling, centrifuge and separate, wash with deionized water and absolute ethanol respectively, and put the reaction product in an oven at 90°C Dry for 6h. The photocatalyst of bismuth oxyiodide with high adsorption was obtained by careful grinding with a mortar.

[0052] The high-adsorption ultrafi...

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Abstract

The invention discloses a high-adsorption bismuth oxyiodide visible-light-driven photocatalyst and application thereof. The high-adsorption bismuth oxyiodide visible-light-driven photocatalyst is prepared by the following steps: (1) mixing a bismuth salt with an acid and an alcohol solution to obtain a mixed solution A, and preparing powder povidone iodine into an aqueous solution B; (2) slowly dropwise adding the mixed solution A into the aqueous solution B, continuously and uniformly stirring overnight at room temperature, transferring the mixed solution into a three-neck flask, and carrying out high-temperature reaction under stirring and reflux conditions; and (3) separating, washing and drying the obtained reaction product. According to the invention, the high-adsorption bismuth oxyiodide ultrafine powder has the advantages of large specific surface area, capability of better absorbing visible light and strong adsorbability to pollutants to be degraded; and the in-situ regenerated polyvinyl pyrrolidone coated bismuth oxyiodide can be directly attached to the surfaces of viscose and cotton fibers, other chemical reagents do not need to be added for after-finishing, and the finishing method is simple and efficient.

Description

technical field [0001] The invention relates to a high-adsorption bismuth iodine oxide visible light catalyst and application thereof, belonging to the technical field of new materials. Background technique [0002] With the rapid development of my country's economy, especially as China is already the world's largest textile producer, the development of the textile industry has also produced a large amount of textile printing and dyeing wastewater. Therefore, effective solutions such as textile printing and dyeing wastewater have always been a problem that plagues the scientific and engineering circles. Among many physical and chemical methods, compared with chemical oxidation, physical adsorption and microbial degradation, photocatalytic degradation is a simple, economical and efficient method. [0003] The concept of photocatalyst originated in the 1980s. Fujishima et al. found that under the irradiation of ultraviolet light, with the help of semiconductor silicon dioxide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J27/06B01J35/10C02F1/30C02F101/38C02F101/30C02F101/10
CPCB01J31/069B01J27/06C02F1/30C02F2101/308C02F2101/40C02F2101/38C02F2305/10C02F2101/10B01J35/39B01J35/612B01J35/613B01J35/615Y02W10/37
Inventor 朱新生杨伟婷孟言洪愫林楚楚孙凯石小丽
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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