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Bismuth molybdate visible-light photocatalytic material grown preferentially on {200}/{002} crystal face and its preparation method and application

A {200}, photocatalytic material technology, applied in the field of bismuth molybdate visible light photocatalytic material and its preparation, can solve the problems of expensive raw materials, cumbersome steps, etc., to simplify the trouble, solve the problem of low photocatalytic degradation efficiency and efficient separation. Effect

Active Publication Date: 2020-05-08
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the research of visible light photocatalytic materials such as bismuth molybdate, there are few reports on the controlled growth and synthesis of crystals.
In particular, the traditional synthesis of special crystal faces requires the addition of surfactants, or two or more steps of synthesis, the steps are cumbersome, and the raw materials are expensive

Method used

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  • Bismuth molybdate visible-light photocatalytic material grown preferentially on {200}/{002} crystal face and its preparation method and application
  • Bismuth molybdate visible-light photocatalytic material grown preferentially on {200}/{002} crystal face and its preparation method and application
  • Bismuth molybdate visible-light photocatalytic material grown preferentially on {200}/{002} crystal face and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This example is the preparation of a novel layered bismuth molybdate photocatalytic material with an alcohol thermal system under acidic conditions. The specific preparation process is as follows:

[0044] 1) Configure reaction precursor:

[0045] First, dissolve bismuth nitrate pentahydrate in ethylene glycol to obtain a bismuth salt solution A with a concentration of 0.6 mol / L, and dissolve sodium molybdate dihydrate in ethylene glycol to obtain a 0.3 mol / L molybdate solution B; Secondly, lye C (NaOH ethanol solution) with a concentration of 0.3 mol / L is prepared; then, A and B are mixed at a molar ratio of bismuth nitrate pentahydrate and sodium molybdate dihydrate 1:1 to obtain a mixed solution D; Finally, while maintaining vigorous stirring, the solution C is slowly added dropwise to the solution D, and the stirring is stopped after a white emulsion is formed in the mixed solution to obtain the precursor E.

[0046] (2) Alcohol thermal reaction:

[0047] After the E obtai...

Embodiment 2

[0049] In this example, the preparation of a novel layered bismuth molybdate photocatalytic material with an alcohol thermal system under neutral conditions, the specific process is as follows:

[0050] 1) Configure reaction precursor:

[0051] First, dissolve bismuth nitrate pentahydrate in ethylene glycol to obtain a bismuth salt solution A with a concentration of 0.6 mol / L, and dissolve sodium molybdate dihydrate in ethylene glycol to obtain a 0.3 mol / L molybdate solution B; Secondly, lye C (NaOH ethanol solution) with a concentration of 0.34 mol / L is prepared; then, A and B are mixed at a molar ratio of bismuth nitrate pentahydrate and sodium molybdate dihydrate 1:1 to obtain a mixed solution D; Finally, while maintaining vigorous stirring, the solution C is slowly added dropwise to the solution D, and the stirring is stopped after a white emulsion is formed in the mixed solution to obtain the precursor E.

[0052] (2) Alcohol thermal reaction:

[0053] After the E obtained in st...

Embodiment 3

[0055] This example is the preparation of a novel layered bismuth molybdate photocatalytic material with an alcohol thermal system under alkaline conditions. The specific process is as follows:

[0056] 1) Configure reaction precursor:

[0057] First, dissolve bismuth nitrate pentahydrate in ethylene glycol to obtain a bismuth salt solution A with a concentration of 0.6 mol / L, and dissolve sodium molybdate dihydrate in ethylene glycol to obtain a 0.3 mol / L molybdate solution B; Secondly, lye C (NaOH ethanol solution) with a concentration of 0.37 mol / L is prepared; then, A and B are mixed at a molar ratio of bismuth nitrate pentahydrate and sodium molybdate dihydrate 1:1 to obtain a mixed solution D; Finally, while maintaining vigorous stirring, the solution C is slowly added dropwise to the solution D, and the stirring is stopped after a white emulsion is formed in the mixed solution to obtain the precursor E.

[0058] (2) Alcohol thermal reaction:

[0059] After the E obtained in st...

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Abstract

The invention discloses a bismuth molybdate visible light photocatalysis material with a characteristic of preferred growth of {200} / {002} crystal face, a preparation method and applications thereof,and belongs to the technical field of preparation of inorganic non-metal nanometer materials, utilization of solar energy and environmental protection. According to the present invention, specificallyin a mixed alcohol solvent system, the crystal growth in an alcohol thermal reaction is controlled by simply adjusting the proportion of an alkali liquid so as to obtain the bismuth molybdate photocatalysis material with different proportions of the exposed {200} / {002} crystal face; and the photocatalysis material can excellently degrade organic pollutants and microorganisms in water under the irradiation of visible light, can solve the defect that the traditional photocatalytic material can only work under ultraviolet light irradiation, and especially can solve the difficult problems of lowphoto-generated electron-hole pair separation efficiency and long photocatalytic degradation time of the common photocatalytic materials.

Description

Technical field [0001] The invention relates to the technical field of inorganic non-metallic nano material preparation, solar energy utilization and environmental protection, in particular to a bismuth molybdate visible light photocatalytic material with {200} / {002} crystal plane preferential growth, and a preparation method and application thereof. Background technique [0002] Photocatalytic technology has broad application prospects in the field of solar energy utilization and environmental restoration, and has received extensive attention from scientific and technological workers. Starting from the basic principles of photocatalytic reactions, photocatalytic reactions can be divided into two categories, namely photocatalytic oxidation reactions and photocatalytic reduction reactions. Most of the photocatalytic organic degradation reactions are photocatalytic oxidation reactions. Most of the traditional photocatalytic materials have photocatalytic effects under ultraviolet l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/31C02F1/30C02F1/50C30B29/32C30B7/14C01G39/00C02F101/38C02F101/34
Inventor 李琦杨炜沂陈彦
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI