A bi for full solar spectrum response 2 o 2.75 /bio 2-x Composite photocatalyst and its preparation method and application

A technology of solar spectrum and composite light, which is applied in the field of Bi2O2.75/BiO2-x composite photocatalyst and its preparation, can solve the problems of difficulty in using far-infrared light and low utilization rate of sunlight, and achieve simple process and high utilization rate , the effect of good application prospects

Active Publication Date: 2021-02-02
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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  • A bi for full solar spectrum response <sub>2</sub> o <sub>2.75</sub> /bio <sub>2-x</sub> Composite photocatalyst and its preparation method and application
  • A bi for full solar spectrum response <sub>2</sub> o <sub>2.75</sub> /bio <sub>2-x</sub> Composite photocatalyst and its preparation method and application
  • A bi for full solar spectrum response <sub>2</sub> o <sub>2.75</sub> /bio <sub>2-x</sub> Composite photocatalyst and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0041] Step 1: Dissolve 0.5g NaBiO3 powder into 20mL 3.0mol / L NaOH solution, and magnetically stir to obtain A solution;

[0042] Step 2: Slowly disperse the A solution into 20mL deionized water under the condition of magnetic stirring to obtain the reaction precursor;

[0043] Step 3: Add the reaction precursor solution into the hydrothermal reaction kettle, place the hydrothermal reaction kettle in a hydrothermal synthesizer, and react at 170° C. for 20 minutes; wherein, the filling ratio of the reaction precursor solution is 60%.

[0044] 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 Bi2O2.75 / BiO2-x composite catalyst of light.

Embodiment 2

[0046] Step 1: Dissolve 0.5g NaBiO3 powder into 20mL 3.0mol / L NaOH solution, and magnetically stir to obtain A solution;

[0047] Step 2: Slowly disperse the solvent A into 20mL deionized water under the condition of magnetic stirring to obtain the reaction precursor;

[0048] Step 3: Add the reaction precursor liquid into the hydrothermal reaction kettle, place the hydrothermal reaction kettle in the hydrothermal synthesizer, and react at 170°C for 40 minutes; wherein, the filling ratio of the reaction precursor solution is 60%;

[0049] 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 Bi2O2.75 / BiO2-x composite catalyst of light.

Embodiment 3

[0051] Step 1: Dissolve 0.5g NaBiO3 powder into 20mL 3.0mol / L NaOH solution, and magnetically stir to obtain A solution;

[0052] Step 2: Slowly disperse the solvent A into 20mL deionized water under the condition of magnetic stirring to obtain the reaction precursor;

[0053] Step 3: Add the reaction precursor solution into the hydrothermal reactor, place the hydrothermal reactor in a hydrothermal synthesizer, and react at 170°C for 60 minutes; wherein, the filling ratio of the reaction precursor solution is 60%;

[0054] 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 Bi2O2.75 / BiO2-x composite catalyst of light.

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Abstract

A Bi with Full Solar Spectral Response 2 o 2.75 / BiO 2‑x Composite photocatalyst and its preparation method and application, NaBiO 3 Add it into the NaOH solution and stir evenly, and then disperse the above solution into a certain amount of deionized water to obtain a reaction precursor solution, and prepare a one-step synthetic Bi 2 o 2.75 / BiO 2‑x composite photocatalyst. The present invention synthesizes Bi in one step 2 o 2.75 / BiO 2‑x Composite photocatalyst, its process is simple, easy to operate, short reaction time, mild reaction conditions, due to the synthesis of Bi 2 o 2.75 / BiO 2‑x Oxygen vacancies exist in the composite photocatalyst, which makes it have the characteristic of all-sunlight spectral response, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a Bi 2 o 2.75 / BiO 2-x Composite photocatalyst and its 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 the following, 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 advant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/18B01J37/10C02F1/30C02F101/30
CPCB01J23/18B01J35/004B01J37/10C02F1/30C02F2101/30C02F2305/10
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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