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Mesoporous BiOCl/Bi2O3 composite powder as well as preparation method and application thereof

A composite powder, mesoporous technology, applied in chemical instruments and methods, water/sludge/sewage treatment, alkali metal compounds, etc. The effect of low cost, good research value and application prospect, and simple operation process

Inactive Publication Date: 2017-05-31
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, BiOCl and cubic Bi 2 o 3 The composite work has not been reported yet, and there are no patents and literature reports on the preparation of mesoporous BiOCl / Bi 2 o 3 Composite powder method

Method used

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  • Mesoporous BiOCl/Bi2O3 composite powder as well as preparation method and application thereof
  • Mesoporous BiOCl/Bi2O3 composite powder as well as preparation method and application thereof
  • Mesoporous BiOCl/Bi2O3 composite powder as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1, the Bi(NO 3 ) 3 ·5H 2O was dissolved in 10mL deionized water and stirred evenly to obtain a bismuth salt solution with a concentration of 0.13mol / L; 4 VO 3 Dissolve in 10mL deionized water, stir evenly to obtain a vanadium salt solution with a concentration of 0.13mol / L;

[0032] Step 2, mix the bismuth salt solution and the vanadium salt solution according to the molar ratio of Bi:V=1:1 (each 10 mL of the bismuth salt solution and the vanadium salt solution), and stir evenly to obtain 20 mL of the mixed solution;

[0033] Step 3: Add 10 mL of NaOH with a concentration of 4 mol / L to 20 mL of the mixed solution, stir for 30 minutes, release ammonia gas, and obtain 30 mL of the precursor solution;

[0034] Step 4, add 15mL of distilled water to 30mL of the precursor solution to make the volume of the precursor solution to 45mL;

[0035] Step 5, put the precursor solution after constant volume into the hydrothermal reaction kettle, ensure the filling rate of t...

Embodiment 2

[0038] Step 1, the Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10mL deionized water and stirred evenly to obtain a bismuth salt solution with a concentration of 0.15mol / L; 4 VO 3 Dissolve in 10mL deionized water, stir evenly to obtain a vanadium salt solution with a concentration of 0.15mol / L;

[0039] Step 2, mix the bismuth salt solution and the vanadium salt solution according to the molar ratio of Bi:V=1:1 (each 10 mL of the bismuth salt solution and the vanadium salt solution), and stir evenly to obtain 20 mL of the mixed solution;

[0040] Step 3: Add 15 mL of NaOH with a concentration of 3.8 mol / L to 20 mL of the mixed solution, stir for 25 minutes, release ammonia gas, and obtain 35 mL of the precursor solution;

[0041] Step 4, add 10mL of distilled water to 35mL of the precursor solution to make the volume of the precursor solution to 45mL;

[0042] Step 5: Put the constant-volume precursor solution into the hydrothermal reaction kettle to ensure that the filling rate ...

Embodiment 3

[0045] Step 1, the Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10mL deionized water and stirred evenly to obtain a bismuth salt solution with a concentration of 0.12mol / L; 4 VO 3 Dissolve in 10mL deionized water, stir evenly to obtain a vanadium salt solution with a concentration of 0.12mol / L;

[0046] Step 2, mix the bismuth salt solution and the vanadium salt solution according to the molar ratio of Bi:V=1:1 (each 10 mL of the bismuth salt solution and the vanadium salt solution), and stir evenly to obtain 20 mL of the mixed solution;

[0047] Step 3: Add 20 mL of NaOH with a concentration of 3.5 mol / L to 20 mL of the mixed solution, stir for 35 minutes, release ammonia gas, and obtain 40 mL of the precursor solution;

[0048] Step 4, add 5mL of distilled water to the 40mL precursor solution to make the volume of the precursor solution constant to 45mL;

[0049] Step 5, put the precursor liquid after constant volume into the hydrothermal reaction kettle, ensure the filling rat...

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Abstract

The invention provides mesoporous BiOCl / Bi2O3 composite powder as well as a preparation method and application thereof. A Bi2O3 micro-crystal is prepared by adopting a hydrothermal method, and HCl is added into the prepared Bi2O3 to carry out an ultrasonic reaction, so that BiOCl is compounded with the Bi2O3. The mesoporous BiOCl / Bi2O3 composite powder is prepared by combining the hydrothermal method, a hydrochloric acid immersing method and an ultrasonic synthesis method. The method has the advantages of short reaction time, a few of flows, simple operation process, moderate reaction conditions, relatively low cost, environmental friendliness and the like, and is a simple and green BiOCl / Bi2O3 powder preparation method. The whole shape of the mesoporous BiOCl / Bi2O3 composite powder prepared by the method is of a mesoporous spherical shape; the mesoporous BiOCl / Bi2O3 composite powder has a relatively high adsorption property on organic pollutants; the photocatalysis effect of pure-phase Bi2O3 powder can be effectively improved; and the mesoporous BiOCl / Bi2O3 composite powder has good research values and application prospects.

Description

technical field [0001] The invention belongs to the field of functional materials and relates to a mesoporous BiOCl / Bi 2 o 3 Composite powder and its preparation method and application. Background technique [0002] With the continuous deepening of industrialization, the growing environmental problems gradually threaten the sustainable development of human society. Semiconductor photocatalysis is a very good choice to solve these environmental problems, because it means that pollutants can be degraded directly using sunlight in a green way. Considering that photogenerated carriers play a major role in the photocatalytic process, a highly active photocatalyst should have a relatively wide spectral absorption range and a very high quantum yield. Combining two narrow-bandgap semiconductors with matching energy bands, the transfer of photogenerated carriers between the two compounded semiconductors will increase the quantum yield. [0003] BiOCl and Bi 2 o 3 It is a narrow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30B01J27/10B01J35/08B01J35/10C02F1/28C02F1/30C02F101/30
CPCB01J20/06C02F1/281C02F1/30B01J20/28019B01J20/28095B01J27/10C02F2305/10C02F2101/30B01J35/60B01J35/51B01J35/39
Inventor 任慧君王琛谈国强赵程程许驰
Owner SHAANXI UNIV OF SCI & TECH
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