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Preparation method of high-activity MoS2/g-C3N4/Bi24O31Cl10 composite photocatalyst

A g-c3n4, 5% g-c3n4 technology, applied in the fields of new materials, new energy utilization and environmental pollution control, can solve the problems of not meeting practical industrial applications, reducing the recombination rate of electrons and holes, and low photocatalytic activity. , to achieve the effect of improved photocatalytic efficiency, low cost and good repeatability

Active Publication Date: 2018-12-07
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure Bi 24 o 31 Cl 10 The photogenerated-electron holes are easy to recombine, and the specific surface area is small, resulting in low photocatalytic activity, which cannot meet the actual industrial application. Therefore, various measures need to be taken to improve its photocatalytic activity, such as changing the energy band Different semiconductor materials with matching positions are recombined to form a heterojunction, which can reduce the recombination rate of electrons and holes inside the material

Method used

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  • Preparation method of high-activity MoS2/g-C3N4/Bi24O31Cl10 composite photocatalyst
  • Preparation method of high-activity MoS2/g-C3N4/Bi24O31Cl10 composite photocatalyst
  • Preparation method of high-activity MoS2/g-C3N4/Bi24O31Cl10 composite photocatalyst

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Experimental program
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Effect test

Embodiment 1

[0030] (1)Bi 24 O 31 Cl 10 Preparation: Dissolve 0.01mol of bismuth nitrate pentahydrate in 50ml of 10% dilute nitric acid by volume, then add 0.02mol of citric acid, and mix until completely dissolved; in addition, dissolve 0.01mol of ammonium chloride in 50ml of distilled water and mix Evenly until completely dissolved. Under the stirring of a constant temperature magnetic stirrer, slowly inject the ammonium chloride solution into the mixed solution of bismuth nitrate pentahydrate and dilute nitric acid of citric acid. When the solution is evenly mixed until the solution is in a clear state, adjust the pH value of the mixed solution to 6. Then continue to heat and stir at 60℃ for 4h, pour it into a crucible with a lid, and then calcinate in a horse boiling furnace at 600℃ for 3h to obtain a light yellow powder, which is pure Bi 24 O 31 Cl 10 .

[0031] (2)g-C 3 N 4 Preparation: Mix 3g of melamine and 10ml of acetic acid (concentration of 36%) evenly, put it in a covered crucibl...

Embodiment 2

[0037] (1)Bi 24 O 31 Cl 10 Preparation: Dissolve 0.01mol of bismuth nitrate pentahydrate in 50ml of 10% dilute nitric acid by volume, then add 0.02mol of citric acid, and mix until completely dissolved; in addition, dissolve 0.01mol of ammonium chloride in 50ml of distilled water and mix Evenly until completely dissolved. Under a constant temperature magnetic stirrer, slowly inject the ammonium chloride solution into the mixed solution of bismuth nitrate pentahydrate and dilute nitric acid of citric acid. When the solution is uniformly mixed until the solution is in a clear state, adjust the pH value of the mixed solution to 5 with ammonia water. Then continue to heat and stir at 80℃ for 3h, pour it into a crucible with a lid, and then calcinate in a horse boiling furnace at 600℃ for 3h to obtain a light yellow powder, which is pure Bi 24 O 31 Cl 10 .

[0038] (2)g-C 3 N 4 Preparation: Mix 3g of melamine and 10ml of acetic acid (concentration of 36%) evenly, put it in a covered c...

Embodiment 3

[0044] (1)Bi 24 O 31 Cl 10 Preparation: Dissolve 0.01mol of bismuth nitrate pentahydrate in 50ml of 10% dilute nitric acid by volume, then add 0.02mol of citric acid, and mix until completely dissolved; in addition, dissolve 0.01mol of ammonium chloride in 50ml of distilled water and mix Evenly until completely dissolved. Under the stirring of a constant temperature magnetic stirrer, slowly inject the ammonium chloride solution into the mixed solution of bismuth nitrate pentahydrate and dilute nitric acid of citric acid. When the solution is evenly mixed until the solution is in a clear state, adjust the pH value of the mixed solution to 6. Then continue heating and stirring at 60°C for 3.5h, pour it into a crucible with a lid, and then calcinate in a horse boiling furnace at 600°C for 3h to obtain a light yellow powder, which is pure Bi 24 O 31 Cl 10 .

[0045] (2)g-C 3 N 4 Preparation: Mix 3g of melamine and 10ml of acetic acid (concentration of 36%) evenly, put it in a covered...

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Abstract

The invention belongs to the technical fields of new materials, new energy utilization and environmental pollution treatment, and relates to a preparation method of a high-activity MoS2 / g-C3N4 / Bi24O31Cl10 composite photocatalyst. The preparation method comprises the following steps: preparing Bi24O31Cl10 by taking bismuth nitrate, ammonium chloride and citric acid as raw materials through an improved solution combustion method; preparing g-C3N4 by taking melamine and acetic acid as raw materials through a one-step thermal polymerization method; preparing MoS2 by taking ammonium molybdate and thiourea as a raw material and dimethylformamide as a solvent through a hydrothermal method; and carrying out an ultrasonic mixing reaction on the Bi24O31Cl10 subjected to ultrasonic dispersion with the g-C3N4 and the MoS2 in a methanol solution, and then carrying out washing, centrifuging and drying to obtain the composite photocatalyst. The method is simple, is easy to implement, is low in cost and good in repeatability, and has a wide application prospect in the fields of water photodecomposition, photocatalytic oxidation of environment pollutants, and the like.

Description

Technical field [0001] The invention belongs to the technical field of new materials, new energy utilization and environmental pollution treatment, and relates to a highly active MoS 2 / g-C 3 N 4 / Bi 24 O 31 Cl 10 Preparation method of composite photocatalyst. Background technique [0002] With the increasing of environmental pollution problems, photocatalytic technology has received more and more attention in the aspects of photolysis of water to produce hydrogen and degradation of organic pollutants. Among them, TiO 2 It has the advantages of low cost, good photocatalytic stability, and high photocatalytic efficiency. It is a commonly used material in the field of photocatalysis. But TiO 2 Due to its wide band gap, about 3.1eV, the photocatalyst can only be excited by ultraviolet light, and ultraviolet light only accounts for about 5% of the solar spectrum. The utilization rate of sunlight is low, which limits its use in environmental governance to a certain extent. Aspect app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCC02F1/30B01J27/24C02F2101/308B01J35/39
Inventor 王敏张宇刘施羽
Owner NORTHEASTERN UNIV
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