Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of low temperature liquid phase precipitation process bismuth oxyiodide visible light photocatalyst

A technology of bismuth oxyiodide and photocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve short reaction time, simple and easy operation, photocatalytic dye degradation rate and recycling utilization high performance effect

Inactive Publication Date: 2019-09-13
CHENGDU UNIVERSITY OF TECHNOLOGY
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although bismuth oxyiodide photocatalysts have attracted more and more attention and gradually become a research hotspot at home and abroad, there are few researches and reports on the preparation of bismuth oxyiodide photocatalysts controlled by organic acids at home and abroad.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 2g of bismuth nitrate pentahydrate and 0.2847g of m-hydroxybenzoic acid, dissolve in a mixed solution composed of 50g of absolute ethanol and 50g of deionized water, stir at a constant temperature of 25°C for 0.5h, and then add 6.8444g of potassium iodide with a mass concentration of 10%. Aqueous solution, constant temperature stirring reaction at 45°C for 1h, during the reaction process, use 10% NaOH aqueous solution to adjust the pH of the reaction system to 2, after the reaction, the product is centrifuged, washed 3 times with deionized water and absolute ethanol, and centrifuged After drying and grinding, the visible light photocatalyst of bismuth oxyiodide was obtained; when the white light LED light illuminated for 100 minutes, the photocatalytic degradation of the methylene blue dye solution by the bismuth oxyiodide photocatalyst reached equilibrium basically; The photocatalytic dye degradation rate of 10mg / L and 50mg / L methylene blue dye solution reached 75...

Embodiment 2

[0035] Weigh 10g of bismuth nitrate pentahydrate and 5.1373g of terephthalic acid, dissolve in a mixed solution composed of 50g of ethylene glycol and 50g of deionized water, stir at a constant temperature of 25°C for 1.5h, and then add 51.3328g of potassium iodide aqueous solution with a mass concentration of 10%. , 25 ℃ constant temperature stirring reaction 5h, the reaction process with a mass concentration of 10% NaOH aqueous solution to adjust the pH of the reaction system to 7, after the reaction, the product was centrifuged, washed 5 times with deionized water and absolute ethanol, after centrifugation Dry and grind to obtain a visible light photocatalyst of bismuth oxyiodide; when the white light LED light illuminates for 95 minutes, the photocatalytic degradation of the crystal violet dye solution by the bismuth oxyiodide photocatalyst reaches a balance basically; The photocatalytic dye degradation rate of 10mg / L and 50mg / L crystal violet dye solution reached 80% and 3...

Embodiment 3

[0037] Weigh 3g of bismuth nitrate pentahydrate and 0.8542g of o-hydroxybenzoic acid, dissolve in a mixed solution composed of 50g of absolute ethanol and 30g of deionized water, stir at a constant temperature of 25°C for 1.5h, and then add 10.2666g of potassium iodide with a mass concentration of 10%. Aqueous solution, 25 ℃ constant temperature stirring reaction for 3h, during the reaction process, the pH of the reaction system was adjusted to 3 with NaOH aqueous solution with a mass concentration of 10%, after the reaction was completed, the product was centrifuged, washed 5 times with deionized water and absolute ethanol, and centrifuged Finally, dry and grind to obtain the visible light photocatalyst of bismuth oxyiodide; when the white light LED light was illuminated for 80 minutes, the photocatalytic degradation of the methyl orange dye solution by the bismuth oxyiodide photocatalyst reached a balance basically; The photocatalytic dye degradation rate of photocatalyst to ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
catalytic efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a low temperature liquid phase precipitation process bismuth oxyiodide visible light photocatalyst. Organic acid assisted regulation and low temperature liquid phase precipitation process are employed to prepare the bismuth oxyiodide photocatalyst, the coordinating complexation of organic acid and bismuth ions is utilized to reduce the hydrolysis rate of bismuth ions and regulate the growth rate, structure and morphology of bismuth oxyiodide crystal nucleus, and white light LED is adopted as the simulated visible light source for photocatalyticdegradation of the dye solution. The preparation method of the bismuth oxyiodide photocatalyst provided by the invention has the characteristics of simple and feasible operation, no need for adding ofmacromolecule or surfactant, reaction under low temperature or room temperature condition, low energy consumption and short reaction time. After 80-100min irradiation by white light LED, the photocatalytic degradation of the bismuth oxyiodide photocatalyst on a dye solution almost achieves equilibrium, and after 100min irradiation by white light LED, the photocatalytic dye degradation efficiencyof the bismuth oxyiodide photocatalyst on 10mg / L and 50mg / L dye solutions respectively reach 75-96% and 35-46%, and after five cycles of utilization, the photocatalytic dye degradation rate of the bismuth oxyiodide photocatalyst is 70-85% of the first photocatalytic dye degradation rate, therefore the bismuth oxyiodide photocatalyst can be widely applied in visible light photocatalytic degradation, dye wastewater pollution treatment and other fields.

Description

[0001] 1. Technical field [0002] The invention relates to a method for preparing a bismuth oxyiodide (BiOI) visible light photocatalyst by a low-temperature liquid phase precipitation method. The bismuth oxyiodide iodine photocatalyst prepared by the low temperature liquid phase precipitation method is suitable for visible light photocatalytic degradation of dyes and can be widely used In the fields of visible light photodegradation of dyes and environmental pollution control of dyes. [0003] 2. Background technology [0004] Dye wastewater mainly comes from dye and dye intermediate production industries and textile, leather, paper, rubber, plastic, cosmetics, pharmaceutical and food industries, with complex composition, large changes in water quantity and quality, high chroma, COD and BOD concentration It is one of the most difficult industrial wastewater to treat due to the characteristics of high concentration, high suspended solids, and many refractory biodegradable subs...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C02F1/30C02F101/30
CPCB01J27/06C02F1/30C02F2101/308B01J35/39
Inventor 万涛赖鑫林袁庆玲韩仁杰白治平徐舒蕊李娜
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com