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Bi2WO6/BiOI composite photocatalysis bactericide and preparation method thereof

A technology of composite photocatalysis and bactericide, applied in the field of photocatalysis, can solve the problems of easy recombination of photogenerated carriers, limited photocatalytic performance, slow photoelectron-hole separation, etc., and achieve simple preparation process and high-efficiency photocatalysis The effect of activity and large specific surface area

Inactive Publication Date: 2016-02-03
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the slow photoelectron-hole separation in monomeric photocatalysts and the easy recombination of photogenerated carriers, the photocatalytic performance is limited. However, the construction of composite materials through semiconductor recombination can accelerate electron-hole separation and improve the photocatalytic performance of materials. [5,6]

Method used

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  • Bi2WO6/BiOI composite photocatalysis bactericide and preparation method thereof
  • Bi2WO6/BiOI composite photocatalysis bactericide and preparation method thereof
  • Bi2WO6/BiOI composite photocatalysis bactericide and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] Bi 2 WO 6 / BiOI composite photocatalytic fungicide preparation method:

[0042] Prepared by hydrothermal synthesis. Weigh 3.0mmolBi(NO 3 ) 3 ·5H 2 O was added to 30.0mL of absolute ethanol, ultrasonically dispersed for 30 minutes to obtain a dispersion, and then 20mL of 0.75mol / L NaOH solution was added to the above dispersion to obtain a mixed solution A; at the same time, 1.0mmol of NaOH 2 WO 4 2H 2 O and 1.0mmol KI were added to 30.0mL ultrapure water, and magnetic stirring was used to dissolve it completely to obtain a solution B; then, the above solution B was added dropwise to the above-mentioned mixed solution A under magnetic stirring to obtain a suspension, and then Continue to stir for 60 minutes; after the stirring is completed, transfer the suspension to a high-pressure reactor equipped with a polytetrafluoroethylene liner, and put it into an electric constant temperature blast drying oven for heat treatment at 180°C for 24 hours; after the reaction, ...

Embodiment 2

[0053] Bi 2 WO 6 / BiOI composite photocatalytic fungicide preparation method:

[0054] Prepared by hydrothermal synthesis, the difference from Example 1 is that the control of Bi 2 WO 6 The molar ratio to BiOI is 1:2. Weigh 3.0mmolBi(NO 3 ) 3 ·5H 2 O was added to 30.0mL of absolute ethanol, ultrasonically dispersed for 30min to obtain a dispersion, and then 20mL of 0.75mol / L NaOH solution was added to the above dispersion to obtain a mixed solution A; at the same time, 0.75mmolNaOH 2 WO 4 2H 2 O and 1.5mmol KI were added to 30.0mL ultrapure water, and magnetically stirred to make it completely dissolved to obtain a solution B; then the above-mentioned solution B was added dropwise to the above-mentioned mixed solution A under magnetic stirring to obtain a suspension, and then Continue to stir for 60 minutes; after the stirring is completed, transfer the suspension to a high-pressure reactor equipped with a polytetrafluoroethylene liner, and put it into an electric con...

Embodiment 3

[0056] Bi 2 WO 6 / BiOI composite photocatalytic fungicide preparation method:

[0057] Prepared by hydrothermal synthesis, the difference from Example 1 is that the control of Bi 2 WO 6 The molar ratio with BiOI is 1:3. Weigh 3.0mmolBi(NO 3 ) 3 ·5H 2 O was added to 30.0mL of absolute ethanol, ultrasonically dispersed for 30min to obtain a dispersion, and then 20mL of 0.75mol / L NaOH solution was added to the above dispersion to obtain a mixed solution A; at the same time, 0.6mmol NaOH 2 WO 4 2H 2 O and 1.8mmol KI were added to 30.0mL ultrapure water, and magnetic stirring was used to dissolve it completely to obtain a solution B; then the above solution B was added dropwise to the above-mentioned mixed solution A under magnetic stirring to obtain a suspension, and then Continue to stir for 60 minutes; after the stirring is completed, transfer the suspension to a high-pressure reactor equipped with a polytetrafluoroethylene liner, and put it into an electric constant te...

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Abstract

The invention belongs to the field of photocatalysis and specifically relates to a Bi2WO6 / BiOI composite photocatalysis bactericide and its preparation method. The Bi2WO6 / BiOI composite photocatalysis bactericide is a three-dimensional layered flower-like structured catalyst composed of Bi2WO6 and BiOI, wherein the molar ratio of Bi2WO6 to BiOI is 1:0.01-100. According to the preparation method, the three-dimensional layered flower-like structured Bi2WO6 / BiOI composite photocatalysis bactericide is prepared under the hydrothermal condition by a one-step coprecipitation method. The preparation method of the invention has a simple process, is easy to control and is low-cost. A Bi2WO6 / BiOI heterojunction structure with visible light response is constructed, photon-generated carrier separation is accelerated, and recombination probability of photogenerated electron-hole pairs is minimized. The Bi2WO6 / BiOI composite photocatalysis bactericide has high-efficiency photocatalytic activity and stability in visible light, has a highly-efficient killing effect on harmful microbes in a water body and has good practical value and potential application prospect in fields of water body purification, marine pollution prevention and the like.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular to a Bi 2 WO 6 / BiOI composite photocatalytic fungicide and preparation method thereof. Background technique [0002] Sustainable development is a common concern in the world today. However, problems such as energy shortage and environmental pollution are becoming more and more serious. All kinds of harmful pollutants accumulate, migrate and transform in the water, soil and air environment, seriously destroying the ecological balance and endangering human life and health. In addition, economic development needs to consume a large amount of energy, which is causing a new energy crisis, and a large amount of mining and use of traditional mineral energy itself will cause serious environmental problems. [0003] Semiconductor photocatalysts have great potential to address energy and the environment. First, semiconductor photocatalytic materials can convert low-density sunlight energy ...

Claims

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Application Information

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IPC IPC(8): B01J27/132A01N59/16A01P1/00A01P3/00C02F1/30C02F1/50
CPCY02W10/37
Inventor 鞠鹏张盾
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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