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Preparation method for snowflake-shaped ZnO/BiOI composite material

A composite material and snowflake-like technology, which is applied in the field of preparation of snowflake-like ZnO/BiOI composite materials, can solve problems such as the preparation method of snowflake-like ZnO/BiOI composite materials, etc., to promote visible light photocatalytic activity and improve adsorption properties. , the effect of response time control

Active Publication Date: 2017-04-19
西安环创高科发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no report on the preparation method of snowflake-like ZnO / BiOI composites

Method used

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  • Preparation method for snowflake-shaped ZnO/BiOI composite material
  • Preparation method for snowflake-shaped ZnO/BiOI composite material
  • Preparation method for snowflake-shaped ZnO/BiOI composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Add 0.5g Zn(NO 3 ) 3 ·6H 2 O and 1.5g NaOH were dissolved in 3mL of deionized water, and then 1g of sodium dodecyl sulfate (SDS) was dispersed in a mixed solution of 100mL of deionized water and 25mL of absolute ethanol, and then the above two solutions were mixed and magnetically stirred After 30 minutes, move it into a polytetrafluoroethylene tank, place it in an MDS-10 microwave digestion apparatus, and obtain a white precipitate after a hydrothermal reaction at 180°C for 40 minutes, wash it with absolute ethanol and deionized water alternately for 3 times, and filter it. After drying, the flower-shaped ZnO nanorods are obtained.

[0024] 2) Mix 0.2g KI and 0.6g Bi(NO 3 ) 3 ·5H 2 O was added to 40mL of ethylene glycol, stirred by magnetic force for 40min, and then 0.2g of the flower-like ZnO nanorods obtained in step 1) was added, ultrasonically dispersed for 20min, poured into an autoclave, solvothermally reacted at 160°C for 3h, and dissolved in absolute et...

Embodiment 2

[0026] 1) Add 0.7g Zn(NO 3 ) 3 ·6H 2 O and 2.5g NaOH were dissolved in 4mL deionized water, and then 1.7g sodium dodecyl sulfate (SDS) was dispersed in a mixed solution of 100mL deionized water and 30mL absolute ethanol, and then the above two solutions were mixed and magnetically After stirring for 30 minutes, move it into a polytetrafluoroethylene tank, place it in a MDS-10 microwave digestion apparatus, and obtain a white precipitate after a hydrothermal reaction at 170°C for 35 minutes, wash it by alternating centrifugation with absolute ethanol and deionized water for 3 times, and filter , and dried to obtain flower-like ZnO nanorods.

[0027] 2) Mix 0.1g KI and 0.38g Bi(NO 3 ) 3 ·5H 2 O was added to 30mL of ethylene glycol, stirred magnetically for 50min, then added 0.2g of the flower-shaped ZnO nanorods obtained in step 1), dispersed ultrasonically for 15min, poured into an autoclave, and reacted solvothermally at 130°C for 2h. Alternately centrifuged with deioniz...

Embodiment 3

[0029] 1) 0.3g Zn(NO 3 ) 3 ·6H 2 O and 1.0g NaOH were dissolved in 5mL of deionized water, and then 2g of sodium dodecyl sulfate (SDS) was dispersed in a mixed solution of 150mL of deionized water and 30mL of absolute ethanol, and then the above two solutions were mixed and magnetically stirred After 30 minutes, move it into a polytetrafluoroethylene tank, place it in a MDS-10 microwave digestion apparatus, and obtain a white precipitate after a hydrothermal reaction at 150°C for 35 minutes, and wash it with absolute ethanol and deionized water alternately for 3 times, and filter it. After drying, the flower-shaped ZnO nanorods are obtained.

[0030] 2) Mix 0.15g KI and 0.5g Bi(NO 3 ) 3 ·5H 2 O was added to 20 mL of ethylene glycol, stirred by magnetic force for 40 min, then 0.25 g of the flower-shaped ZnO nanorods obtained in step 1) were added, ultrasonically dispersed for 25 min, poured into an autoclave, solvothermally reacted at 150°C for 3 h, and dissolved in absolu...

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Abstract

The invention discloses a preparation method for a snowflake-shaped ZnO / BiOI composite material. Firstly, Zn(NO3)3.6H2O and NaOH are dissolved in deionized water; then, lauryl sodium sulfate is dispersed into a mixed solution of absolute ethyl alcohol and deionized water; and next, the two solutions are mixed, and after magnetic stirring is carried out, a microwave-assisted hydrothermal method is adopted, and the flower-shaped ZnO nanorods are obtained. KI and Bi(NO3)3.5H2O are added into ethylene glycol, after a period of magnetic stirring, the prepared flower-shaped ZnO nanorods are added, ultrasonic dispersion is added, and after a solvothermal reaction, the flaxen snowflake-shaped ZnO / BiOI composite material is obtained. Compared with other shapes, the snowflake-shaped ZnO / BiOI composite material is a tightly-stacked laminar BiOI sphere formed on the surfaces of the ZnO nanorods, and the photocatalytic activity is remarkably improved. By means of the solvothermal method, the reaction time and the reaction temperature are controlled easily, equipment is simple, and the cost is low.

Description

technical field [0001] The invention relates to a preparation method of a snowflake-shaped ZnO / BiOI composite material. Background technique [0002] Bismuth oxyhalides (BiOX, X—F, Cl, Br, I) with layered structure, as a new class of semiconductor photocatalysts, have attracted much attention for their good photoresponsiveness to ultraviolet and visible light. As a kind of bismuth oxyhalide, BiOI has a narrow band gap (1.77-1.92eV), exhibits better absorption characteristics in the visible light range, and has excellent photocatalytic degradation performance under visible light irradiation, but pure BiOI Photogenerated electrons and holes are very easy to recombine, and the semiconductor recombination method can effectively suppress the recombination rate of photogenerated carriers, thereby increasing the separation rate of carriers, which is beneficial to improving the photocatalytic performance of the material. [0003] Wang et al. (Wang S, Guan Y, Wang L. Applied Catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J27/138C02F1/28C02F1/30B01J20/30
CPCB01J20/027B01J20/06C02F1/281C02F1/30B01J20/2804B01J27/138C02F2305/10C02F2101/308B01J35/39
Inventor 刘俊莉赵燕茹马建中鲍艳李军奇王帅
Owner 西安环创高科发展有限公司
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