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Bi2MoO6-ZnO composite photocatalyst and preparation method thereof

A technology of zinc oxide and composite light, which is applied in the field of composite materials and photocatalysis, can solve the problems of poor photocatalytic effect and weak response ability of bismuth molybdate, and achieve good photocatalytic degradation effect

Inactive Publication Date: 2014-10-15
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new method for preparing a new binary heterostructure photodegradable organic material in view of the weak response ability of ZnO photocatalysts in the visible light range and the poor photocatalytic effect of bismuth molybdate in composite materials.

Method used

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  • Bi2MoO6-ZnO composite photocatalyst and preparation method thereof
  • Bi2MoO6-ZnO composite photocatalyst and preparation method thereof
  • Bi2MoO6-ZnO composite photocatalyst and preparation method thereof

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Embodiment 1

[0019] First add 1 drop of 6mol / L nitric acid to 15ml of deionized water, disperse 5mmol of bismuth nitrate evenly into the above acid solution, then slowly add 10ml of 0.25mol / L sodium molybdate solution into the above aqueous solution , and stir evenly to obtain solution A; add 0.125 mmol of zinc acetate to 10 ml of isopropanol, and stir well to obtain solution B. Then slowly pour solution B into solution A, stir at room temperature for 30 minutes, add 5 mol / L ammonia solution, and adjust the pH value of the solution to neutral. Finally, transfer the above mixed solution to a 100 ml hydrothermal reaction kettle, and react at 140°C for 12 hours; after the hydrothermal reaction product is separated by high-speed centrifugation, it is washed with distilled water and absolute ethanol, repeated centrifugal washing several times, and then placed in a vacuum oven Dry in medium to obtain bismuth molybdate-zinc oxide composite photocatalyst.

Embodiment 2

[0021] First add 2 drops of 6mol / L nitric acid to 15ml of deionized water, disperse 5mmol of bismuth nitrate evenly into the above acid solution, then slowly add 10ml of 0.25mol / L sodium molybdate solution into the above aqueous solution , and stir evenly to obtain solution A; add 0.125 mmol of zinc acetate to 10 ml of isopropanol, and stir well to obtain solution B. Then slowly pour solution B into solution A, stir at room temperature for 30 minutes, add 5 mol / L ammonia solution, and adjust the pH value of the solution to neutral. Finally, transfer the above mixed solution to a 100 ml hydrothermal reaction kettle, and react at 160°C for 12 hours; after the hydrothermal reaction product is separated by high-speed centrifugation, it is washed with distilled water and absolute ethanol, repeated centrifugal washing several times, and then placed in a vacuum oven Dry in medium to obtain bismuth molybdate-zinc oxide composite photocatalyst.

Embodiment 3

[0023] First add 2 drops of 6mol / L nitric acid to 15ml of deionized water, disperse 5mmol of bismuth nitrate evenly into the above acid solution, then slowly add 10ml of 0.25mol / L sodium molybdate solution into the above aqueous solution , and stir evenly to obtain solution A; add 0.125 mmol of zinc acetate to 10 ml of isopropanol, and stir well to obtain solution B. Then slowly pour solution B into solution A, stir at room temperature for 30 minutes, add 5 mol / L ammonia solution, and adjust the pH value of the solution to neutral. Finally, transfer the above mixed solution to a 100ml hydrothermal reaction kettle, and react at 180°C for 12 hours; after the hydrothermal reaction product is separated by high-speed centrifugation, it is washed with distilled water and absolute ethanol, repeated centrifugal washing several times, and then placed in a vacuum oven Dry in medium to obtain bismuth molybdate-zinc oxide composite photocatalyst.

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Abstract

The invention relates to a Bi2MoO6-ZnO composite photocatalyst and a preparation method thereof. The method mainly comprises the steps as follows: taking zinc acetate, bismuth nitrate and sodium molybdate in a certain proportion as raw materials, evenly mixing the materials through mechanical stirring in a certain order, adjusting the pH value of a solution, and then further preparing the Bi2MoO6-ZnO composite photocatalyst through a hydrothermal reaction. The Bi2MoO6-ZnO composite photocatalyst has the benefits as follows: the obtained composite visible-light-induced photocatalyst is formed by composition of Bi2MoO6 and ZnO, and the composite visible-light-induced photocatalyst has better absorption performance in ultraviolet-visible light regions with the wave length in a range of 320-580 nm; methyl orange has the good photocatalytic degradation effect under exposure to ultraviolet-visible light, the degradation rate exceeds 90% after 60 min, then the degradation effect tends to be gentle, and the total degradation rate of the methyl orange is 95% after 2 h.

Description

Technical field: [0001] The invention belongs to the technical field of composite materials and photocatalysis, in particular to a method for hydrothermally preparing a bismuth molybdate-zinc oxide composite photocatalyst, namely a bismuth molybdate-zinc oxide composite photocatalyst and a preparation method thereof. Background technique: [0002] The energy crisis and environmental pollution brought about by the rapid development of social economy and industrial production are increasingly threatening the further development of human life and production. Building a clean, environmentally friendly renewable energy system and environmental pollution control technology has become a global concern Focus: Sunlight is an available clean energy. Semiconductor photocatalysis technology can directly use sunlight to oxidize and degrade organic pollutants at room temperature. Therefore, using photocatalysis to fully utilize sunlight to degrade organic pollutants is the solution One of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28
Inventor 田晓霞屈绍波杜红亮王斌科马丽斯
Owner AIR FORCE UNIV PLA
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