Ag/BiO2-x/Bi2O3/Bi2O2.75 composite photocatalyst, preparation method and application

A catalyst and composite light technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of difficulty in using far-infrared light and low utilization rate of sunlight problems, to achieve the effect of simple process, improved utilization rate and mild reaction conditions

Active Publication Date: 2018-11-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most of the photocatalysts currently reported only respond to ultraviolet light or ultraviolet-visible light, and it is difficult to utilize near-infrared light and far-infrared light, which account for about 43% of sunlight, and the utilization rate of sunlight is low.

Method used

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  • Ag/BiO2-x/Bi2O3/Bi2O2.75 composite photocatalyst, preparation method and application
  • Ag/BiO2-x/Bi2O3/Bi2O2.75 composite photocatalyst, preparation method and application
  • Ag/BiO2-x/Bi2O3/Bi2O2.75 composite photocatalyst, preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0045] Step 1: Add 0.5g NaBiO 3 The powder was dissolved in 20mL 3.0mol / L NaOH solution, and magnetically stirred to obtain solution A;

[0046] Step 2: Slowly disperse solution A into 20mL deionized water under the condition of magnetic stirring to obtain the reaction precursor;

[0047] Step 3: Add the reaction precursor solution into the hydrothermal reaction kettle, place the hydrothermal reaction kettle in the hydrothermal synthesizer, and react at 170°C for 40 minutes; the filling ratio of the reaction precursor solution is 60%;

[0048] Step 4: After the reaction is completed, cool naturally to 70°C, take out the precipitate in the hydrothermal reaction kettle, wash with deionized water and absolute ethanol, and finally dry at a constant temperature at 70°C to obtain Bi 2 o 2.75 / BiO 2-x Composite photocatalysts, denoted as BiO-OVs.

Embodiment 2

[0050] Step 1: Add 0.5g NaBiO 3 Add to 20mL 3mol / L NaOH solution and stir evenly to get NaBiO 3 NaOH solution, and then disperse the above solution into 20mL deionized water and stir evenly to obtain the reaction precursor solution, and react at 170°C for 40min by hydrothermal method to prepare Bi 2 o 2.75 / BiO 2-x Composite photocatalyst; Wherein, the filling ratio of reaction precursor liquid is 60%;

[0051] Step 2: Add 0.3g Bi 2 o 2.75 / BiO 2-x The composite photocatalyst was dispersed into 30mL deionized water, and stirred for 30min under indoor light conditions to obtain suspension A;

[0052] Step 3: Add 0.015g AgNO 3 Disperse in 30mL deionized water, and ultrasonicate for 30min to obtain solution B;

[0053] Step 4: Slowly disperse solution B into suspension A, and stir at high speed for 2 hours under natural light;

[0054] Step 5: After the reaction is completed, the obtained powder is washed three times with deionized water and absolute ethanol, and dried a...

Embodiment 3

[0056] Step 1: Add 0.5g NaBiO 3 Add to 20mL 3mol / L NaOH solution and stir evenly to get NaBiO 3 NaOH solution, and then disperse the above solution into 20mL deionized water and stir evenly to obtain the reaction precursor solution, and react at 170°C for 40min by hydrothermal method to prepare Bi 2 o 2.75 / BiO 2-x Composite photocatalyst; Wherein, the filling ratio of reaction precursor liquid is 60%;

[0057] Step 2: Add 0.3g Bi 2 o 2.75 / BiO 2-x The composite photocatalyst was dispersed into 30mL deionized water, and stirred for 30min under indoor light conditions to obtain suspension A;

[0058] Step 3: Add 0.03g AgNO 3 Disperse in 30mL deionized water, and ultrasonicate for 30min to obtain solution B;

[0059] Step 4: Slowly disperse solution B into suspension A, and stir at high speed for 2 hours under natural light;

[0060] Step 5: After the reaction is completed, the obtained powder is washed three times with deionized water and absolute ethanol, and dried at...

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Abstract

The invention discloses an Ag/BiO2-x/Bi2O3/Bi2O2.75 composite photocatalyst, a preparation method and application. NaBiO3 is added into a NaOH solution and then is dispersed to water to obtain a reaction precursor solution, and Bi2O2.75/BiO2-x is prepared through hydrothermal reaction; the Bi2O2.75/BiO2-x is dispersed in water, and stirring is performed under natural lighting condition to obtain turbid liquid A; AgNO3 is dispersed into the water to obtain a solution B; the solution B is dispersed into the turbid liquid A, and Ag/BiO2-x/Bi2O3/Bi2O2.75 is obtained under natural lighting condition. The Ag/BiO2-x/Bi2O3/Bi2O2.75 composite photocatalyst has oxygen vacancies, the synergistic resonance effect of the oxygen vacancies and surface plasmons of precious metals Ag makes the photocatalyst respond to a complete solar spectrum, and the photocatalyst is used for catalytic degradation of organic pollutants.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a Ag / BiO 2-x / Bi 2 o 3 / Bi 2 o 2.75 Composite photocatalyst, preparation method and application. Background technique [0002] At present, environmental pollution is becoming more and more serious, especially air pollution and water pollution, which have affected the normal life of human beings. So far, the most commonly used methods for treating polluted water bodies are as follows, such as flotation, evaporation, extraction, redox, flocculation, etc. Although suspended solids and some organic pollutants can be removed, they are difficult to degrade Organic matter, the effect is very poor, and often cause secondary pollution. Compared with the above methods, semiconductor photocatalysis technology can completely degrade organic matter into non-toxic inorganic small molecules, the effect is good, and the cost is low with sunlight as the driving force, which has obvious a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/68C02F1/30
CPCB01J23/681B01J35/004C02F1/30C02F2101/308C02F2305/10
Inventor 谈国强王敏张丹李斌任慧君夏傲
Owner SHAANXI UNIV OF SCI & TECH
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