Preparation method and application of bismuth oxychloride with function of adjusting position of energy band

A bismuth oxychloride, functional technology, applied in the field of environmental protection and pollutant degradation, to achieve the effect of improving photodegradation efficiency, strong oxidation ability, and degradation rate

Active Publication Date: 2019-09-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bismuth oxychloride, as a common wide-bandgap semiconductor nanomaterial, can only have strong absorption under ultraviolet light. Bismuth oxychloride synthesized through conventional hydrothermal and hydrolysis strategies cannot have good absorption under visible light. Photocatalytic performance

Method used

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  • Preparation method and application of bismuth oxychloride with function of adjusting position of energy band
  • Preparation method and application of bismuth oxychloride with function of adjusting position of energy band
  • Preparation method and application of bismuth oxychloride with function of adjusting position of energy band

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of BiOCl: Weigh Bi(NO 3 ) 3 ·5H 2 O was dissolved in 40ml ethanol / diethylene glycol mixed solvent (V 乙醇 :V 二甘醇 =1:1), to obtain a concentration of 10g / L suspension, ultrasonic 1h at room temperature; then, similarly, weighing KCl was dissolved in 40ml ethanol / diethylene glycol mixed solvent (V 乙醇 :V 二甘醇 =1:1) to obtain a suspension with a concentration of 1.5g / L, which was sonicated at room temperature for 1h; then the KCl suspension was added dropwise to the Bi(NO 3 ) 3 ·5H 2 O suspension, and stirred at 400r / min for 1h. Afterwards, the resulting suspension was transferred to a polytetrafluoroethylene-lined high-pressure hydrothermal reactor and heated at 160 °C for 16 hours. After cooling to room temperature, it was washed alternately with deionized water and ethanol for 7 times to obtain BiOCl sample, labeled BiOCl-1.

[0041] The BiOCl-1 prepared in this example was used to photodegrade organic pollutants using the aforementioned method, and the...

Embodiment 2

[0047] Preparation of BiOCl: Weigh Bi(NO 3 ) 3 ·5H 2 O was dissolved in 40ml ethanol / diethylene glycol mixed solvent (V 乙醇 :V 二甘醇 =1:2), to obtain a concentration of 10g / L suspension, ultrasonic 2h at room temperature; then, similarly, weighing KCl was dissolved in 40ml ethanol / diethylene glycol mixed solvent (V 乙醇 :V 二甘醇 =1:2) to obtain a suspension with a concentration of 1.5g / L, which was sonicated for 1h at room temperature; then the KCl suspension was added dropwise to the Bi(NO 3 ) 3 ·5H 2 O suspension, and stirred at 600r / min for 2h. Afterwards, the resulting suspension was transferred to a polytetrafluoroethylene-lined high-pressure hydrothermal reactor and heated at 200 °C for 18 hours. After cooling to room temperature, it was washed alternately with deionized water and absolute ethanol for 3 times. , to obtain a BiOCl sample, labeled as BiOCl-2.

[0048] Utilize the aforementioned method to adopt the BiOCl-2 prepared in this example to photodegrade organic ...

Embodiment 3

[0051] Preparation of BiOCl: Weigh Bi(NO 3 ) 3 ·5H 2 O was dissolved in 40ml ethylenediamine / diethylene glycol mixed solvent (V 乙二胺 :V 二甘醇 =1:1), to obtain a concentration of 20g / L suspension, ultrasonic 0.5h at room temperature; then, similarly, weighing KCl was dissolved in 40ml ethylenediamine / diethylene glycol mixed solvent (V 乙二胺 :V 二甘醇 =1:1) to obtain a suspension with a concentration of 3 g / L, which was sonicated for 1 h at room temperature; then the KCl suspension was added dropwise to the Bi(NO 3 ) 3 ·5H 2 O suspension, and stirred at 200r / min for 1h. Afterwards, the resulting suspension was transferred to a polytetrafluoroethylene-lined high-pressure hydrothermal reactor and heated at 160 °C for 16 hours. After cooling to room temperature, it was washed alternately with deionized water and ethanol for 5 times to obtain A BiOCl sample, labeled BiOCl-3.

[0052] The BiOCl-3 prepared in this example was used to photodegrade organic pollutants by the aforementio...

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Abstract

The invention discloses a preparation method and application of bismuth oxychloride with a function of adjusting the position of an energy band, and belongs to the technical field of environmental protection and pollutant degradation. According to the preparation method, a mixed solvent composed of any more of ethyl alcohol, ethanediamine, diethylene glycol and triethylene glycol is utilized to replace existing ethyl alcohol as a reaction solvent, and a BiOCl material with a down-shifted valence band is prepared through a solvothermal reaction. The oxidizability of photo-generated h<+> of theBiOCl material with the down-shifted valence band is stronger, which is more conductive to degrading pollutants; in addition, the h<+> with the strong oxidizability can activate H2O2 to generate O2<->, and the photodegradation efficiency is further improved. A photodegradation effect shows that the degradation rate of BiOCl for rhodamine B, methyl orange and phenol is increased by 3.2-4.6 times after the H2O2 is added.

Description

technical field [0001] The invention relates to a preparation method and application of bismuth oxychloride with the function of adjusting energy band positions, and belongs to the technical fields of environmental protection and pollutant degradation. Background technique [0002] In recent decades, with the accelerated development of economy and industrialization, environmental problems have become more and more serious, silently affecting the homeland we depend on for survival, and greatly reducing people's quality of life. Papermaking, petrochemical, dyestuff, textile and other industries discharge a large amount of industrial wastewater, seriously polluting our precious fresh water resources. Therefore, it is urgent to develop a method that can effectively degrade these organic pollutants to solve the increasingly serious environmental problems. [0003] At present, methods such as Fenton method, ozone oxidation method, electrochemical oxidation and photocatalytic oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C01G29/00C02F1/72C02F101/30C02F101/34
CPCB01J27/06B01J35/004C01G29/00C02F1/722C02F1/725C02F2101/30C02F2101/308C02F2101/345C02F2305/02C02F2305/10
Inventor 刘湘赵晗朱洁莲张倩尹金慧夏咏梅王海军
Owner JIANGNAN UNIV
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