A method for suppressing photocorrosion of bismuth oxyhalide

A bismuth oxyhalide and photocorrosion technology, applied in the field of photocatalytic materials, can solve the problems of easy photocorrosion, performance degradation, hindering use, etc., and achieve the effects of excellent photocorrosion resistance, stable catalyst, and easy recovery.

Active Publication Date: 2022-04-05
FUZHOU UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of bismuth oxyhalide is prone to photocorrosion after a long period of illumination, resulting in a sharp decline in its performance, which seriously hinders its use in the field of photocatalysis.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for suppressing photocorrosion of bismuth oxyhalide
  • A method for suppressing photocorrosion of bismuth oxyhalide
  • A method for suppressing photocorrosion of bismuth oxyhalide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Preparation of bismuth oxybromide (BiOBr) nanosheets: 1 mmol bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) Dissolve in 30 mL ethylene glycol solution and transfer to a syringe with a 50 mL range, then inject slowly at a speed of 2 mL / min, drop into 30 mL aqueous solution containing 3 mmol potassium bromide (KBr), immediately There will be a white precipitate. After dripping, stir for 30 min, centrifuge and wash the product three times with water, transfer to 30 mL of aqueous solution with pH 1, and finally put it into a 50 mL hydrothermal kettle, and heat at 140°C for 8 hours. After the reaction is completed, centrifuge, wash with water and ethanol for several times, and place in a 60°C oven to dry overnight to obtain bismuth oxybromide (BiOBr) nanosheets.

[0026] 2) Preparation of cobalt nitrate hexahydrate aqueous solution: Dissolve 1 g of cobalt nitrate hexahydrate solid in 50 mL of water to obtain.

[0027] 3) Preparation of bismuth cobalt trioxide / bism...

Embodiment 2

[0030] 1) Preparation of bismuth oxychloride (BiOCl) nanosheets: 1 mmol bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) Dissolve in 30 mL ethylene glycol solution and transfer to a syringe with a 50 mL range, then inject slowly at a speed of 2 mL / min, drop into 30 mL aqueous solution containing 3 mmol potassium chloride (KCl), immediately There will be a white precipitate. After dripping, stir for 30 min, centrifuge and wash the product three times with water, transfer to 30 mL of aqueous solution with pH 1, and finally put it into a 50 mL hydrothermal kettle, and heat it at 140°C for 4 hours. After the reaction is completed, centrifuge, wash with water and ethanol for several times, and place in a 60°C oven to dry overnight to obtain bismuth oxychloride (BiOCl) nanosheets.

[0031] 2) Preparation of cobalt nitrate hexahydrate aqueous solution: Dissolve 1 g of cobalt nitrate hexahydrate solid in 50 mL of water to obtain.

[0032] 3) Preparation of bismuth cobalt trioxid...

Embodiment 3

[0035] 1) Preparation of bismuth oxyiodide (BiOI) nanosheets: 1 mmol bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) Dissolved in 30 mL of ethylene glycol solution and transferred to a syringe with a 50 mL range, then injected slowly at a rate of 2 mL / min, dripping into 30 mL of an aqueous solution containing 3 mmol of potassium iodide (KI), there will be White precipitate. After dripping, stir for 30 min, centrifuge and wash the product three times with water, transfer to 30 mL of aqueous solution with a pH of 1, and finally put it into a 50 mL hydrothermal kettle, and heat it at 160°C for 10 h. After the reaction is completed, centrifuge, wash with water and ethanol several times, and place in a 60°C oven to dry overnight to obtain bismuth oxyiodide (BiOI) nanosheets.

[0036] 2) Preparation of cobalt nitrate hexahydrate aqueous solution: Dissolve 1 g of cobalt nitrate hexahydrate solid in 50 mL of water to obtain.

[0037] 3) Preparation of bismuth cobalt trioxide / bi...

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

No PUM Login to view more

Abstract

The invention relates to a method for suppressing photocorrosion of bismuth oxyhalide, which belongs to the technical field of photocatalytic materials. Pure bismuth oxyhalide will generate a passivation layer (Bi 2 o 3 ), severely hampered the expression of its photocatalytic performance. In the present invention, through in-situ photodeposition of cobalt nitrate, the generated cobalt oxide co-catalyst has an alloying effect with halogen atoms to form cobalt bismuth trioxide (BiCoO 3 ) alloy, which wraps bismuth oxyhalide, effectively inhibits its photocorrosion and improves its photocatalytic performance. The preparation method provided by the invention has cheap materials, simple process and controllable conditions, and the obtained bismuth cobalt trioxide (BiCoO 3 ) alloy can effectively improve the photoelectrochemical properties of bismuth oxyhalide, promote its charge separation, and improve its photocatalytic performance.

Description

technical field [0001] The invention relates to a method for suppressing photocorrosion of bismuth oxyhalide, which belongs to the technical field of photocatalytic materials. Background technique [0002] With the development of modern industry and the massive burning of fossil fuels, the problems of environmental pollution and energy shortage are becoming more and more serious. Therefore, the control of environmental pollution and the development of renewable and clean energy are of great significance to the development of the national economy and the realization of sustainable development (Nat Mater., 2017, 16, 23-34). As a clean, efficient, and safe renewable energy source, solar energy has attracted widespread attention, especially the use of semiconductor photocatalysis technology to convert low-density solar energy into high-density chemical energy and apply it to the degradation of organic pollutants and artificial photosynthesis. Fixed CO 2 , photocatalytic hydrog...

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 Patents(China)
IPC IPC(8): B01J27/06B01J23/843B01J37/10B01J37/34B01J37/03C01B13/02
CPCB01J27/06B01J23/8437B01J23/002B01J35/004B01J35/0033B01J35/0013B01J37/10B01J37/345B01J37/031C01B13/0207Y02P20/133
Inventor 喻志阳罗志珊张诗佳叶晓圆
Owner FUZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap