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g-C3N4/Bi2O3 composite powder as well as preparation method and application thereof

A composite powder, mixed powder technology, applied in chemical instruments and methods, water/sludge/sewage treatment, other chemical processes, etc., can solve the problems of composite work that has not been reported, no patents and literature reports, etc. Achieve the effect of improving the photocatalytic effect, low cost and high adsorption characteristics

Active Publication Date: 2017-05-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To date, the use of ultrasound to achieve g-C 3 N 4 compared to cubic 2 o 3 The work of compounding has not been reported yet, and there are no patents and literature reports on the preparation of g-C 3 N 4 / Bi 2 o 3 Composite powder method

Method used

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  • g-C3N4/Bi2O3 composite powder as well as preparation method and application thereof
  • g-C3N4/Bi2O3 composite powder as well as preparation method and application thereof
  • g-C3N4/Bi2O3 composite powder as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 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 0.13mol / L; 4 VO 3 Dissolve in 10mL deionized water, stir evenly to obtain a vanadium salt solution with a concentration of 0.13mol / L;

[0033] 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;

[0034] 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;

[0035] Step 4, add 15mL of distilled water to the 30mL precursor solution to make the volume of the precursor solution to 45mL;

[0036] Step 5, put the precursor solution after constant volume into the hydrothermal reaction kettle, ensure the filling rate of the...

Embodiment 2

[0040] 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;

[0041] 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;

[0042] Step 3: Add 13 mL of NaOH with a concentration of 4 mol / L to 20 mL of the mixed solution, stir for 25 minutes, release ammonia gas, and obtain 33 mL of the precursor solution;

[0043] Step 4, add 12mL of distilled water to 33mL of the precursor solution to make the volume of the precursor solution to 45mL;

[0044] Step 5, put the precursor solution after constant volume into the hydrothermal reaction kettle, ensure the filling rate of ...

Embodiment 3

[0048] 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 0.13mol / L; 4 VO 3 Dissolve in 10mL deionized water, stir evenly to obtain a vanadium salt solution with a concentration of 0.13mol / L;

[0049] 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;

[0050] Step 3: Add 17 mL of NaOH with a concentration of 4 mol / L to 20 mL of the mixed solution, stir for 35 minutes, release ammonia gas, and obtain 37 mL of the precursor solution;

[0051] Step 4, add 8 mL of distilled water to 37 mL of the precursor solution to make the volume of the precursor solution to 45 mL;

[0052] Step 5: Put the constant-volume precursor liquid into the hydrothermal reaction kettle to ensure that the filling rate of...

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Abstract

The invention provides g-C3N4 / Bi2O3 composite powder as well as a preparation method and application thereof. The preparation method comprises the following steps of: preparing a precursor solution by adopting Bi(NO3)3.5H2O and NH4VO3 as raw materials, and preparing cubic-phase Bi2O3 microcrystals by virtue of a hydrothermal method; then preparing g-C3N4 from urea serving as a raw material by virtue of a calcining method; and finally, mixing the g-C3N4 and the Bi2O3, adding methanol, and performing an ultrasonic reaction, thus obtaining the g-C3N4 / Bi2O3 composite powder. According to the invention, the g-C3N4 / Bi2O3 composite powder is prepared by combing the traditional hydrothermal method, calcining method and ultrasonic synthesis method, and the prepared g-C3N4 / Bi2O3 composite powder has high absorption performance and photocatalytic performance, has high photocatalytic effect on organic pollutants under the irradiation of visible light, can be used for greatly improving the photocatalytic effect of the pure-phase Bi2O3, and has good application prospect in the aspects such as the environmental sewage treatment and the like.

Description

technical field [0001] The invention belongs to the field of functional materials and relates to a g-C 3 N 4 / 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] g-C 3 N 4 and Bi 2 o 3 It is a narr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J20/06B01J20/28B01J20/30C02F1/28C02F1/30C02F101/30
CPCB01J20/02B01J20/06C02F1/281C02F1/30B01J20/28016B01J20/28078B01J27/24C02F2101/30C02F2305/10B01J35/50B01J35/64B01J35/39
Inventor 任慧君王琛谈国强赵程程许驰
Owner SHAANXI UNIV OF SCI & TECH
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