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Carbon nitride nanoparticle modified bismuth vanadate composite photocatalyst and preparation method thereof

A nanoparticle, carbon nitride technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of difficulty in fully exerting the synergistic effect of carbon nitride and bismuth vanadate, highly active phase interface Insufficient exposure, large size of composite photocatalyst, etc., to achieve the effect of superior photocatalytic performance, good visible light response performance, and improved photocatalytic performance

Active Publication Date: 2016-04-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The technical problem to be solved by the present invention is that the existing g-C 3 N 4 / BiVO 4 Composite photocatalysts have the disadvantages of large size, small specific surface area, large charge transfer distance from the bulk phase to the surface, insufficient exposure of the highly active phase interface, and difficulty in fully utilizing the synergistic effect of carbon nitride and bismuth vanadate. Carbon nitride nanoparticle-modified bismuth vanadate composite photocatalyst with high-efficiency charge separation and high photocatalytic activity and its preparation method. In the composite photocatalyst, carbon nitride nanoparticles are discretely compounded on the surface of porous bismuth vanadate, which is beneficial to exposure The highly active carbon nitride-bismuth vanadate phase interface has broad application prospects in the fields of environmental pollution control and energy; at the same time, the preparation method of the composite photocatalyst is simple, low in cost and good in repeatability, which can well meet mass production requirements

Method used

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  • Carbon nitride nanoparticle modified bismuth vanadate composite photocatalyst and preparation method thereof
  • Carbon nitride nanoparticle modified bismuth vanadate composite photocatalyst and preparation method thereof
  • Carbon nitride nanoparticle modified bismuth vanadate composite photocatalyst and preparation method thereof

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Effect test

Embodiment 1

[0040] The first step is to take a certain amount of melamine powder and add it to the crucible, cover the crucible to form a semi-closed environment, and then put it into the muffle furnace controlled by the temperature program, and increase the temperature by 10°C / min. The room temperature was raised to 500°C and kept at this temperature for 2h.

[0041] In the second step, the temperature of the muffle furnace was raised to 520° C. at a rate of 2° C. / min, and kept at this temperature for 2 hours for further deamination. After cooling to room temperature, the obtained product was ground in an agate mortar to obtain carbon nitride powder.

[0042] In the third step, take 15 parts (0.552 g) of carbon nitride obtained in the second step by weight, add it into high-purity water, and perform ultrasonic dispersion treatment for 30 minutes to make it uniformly dispersed.

[0043] In the fourth step, under the condition of vigorous stirring, 3 parts by weight (0.582 g) of bismuth n...

Embodiment 2

[0054] The first step is to take a certain amount of melamine powder and add it to the crucible, cover the crucible to form a semi-closed environment, and then put it into a muffle furnace controlled by temperature programming, and increase the temperature by 15°C / min. The room temperature was raised to 500°C and kept at this temperature for 4h.

[0055] In the second step, the temperature of the muffle furnace was raised to 550° C. at a rate of 2° C. / min, and kept at this temperature for 4 hours for further deamination. After cooling to room temperature, the obtained product was ground in an agate mortar to obtain carbon nitride powder.

[0056] In the third step, take 15 parts (0.552 g) of carbon nitride obtained in the second step by weight, add it into high-purity water, and perform ultrasonic dispersion treatment for 30 minutes to make it uniformly dispersed.

[0057] In the fourth step, under the condition of vigorous stirring, 3 parts by weight (0.582 g) of bismuth nit...

Embodiment 3

[0063] The first step is to take a certain amount of melamine powder and add it to the crucible, cover the crucible to form a semi-closed environment, and then put it into the muffle furnace controlled by the temperature program, and increase the temperature by 5°C / min. The room temperature was raised to 490°C and kept at this temperature for 3h.

[0064] In the second step, the temperature of the muffle furnace was raised to 540° C. at a rate of 2° C. / min, and kept at this temperature for 3 hours for further deamination. After cooling to room temperature, the obtained product was ground in an agate mortar to obtain carbon nitride powder.

[0065] In the third step, take 15 parts (0.552 g) of carbon nitride obtained in the second step by weight, add it into high-purity water, and perform ultrasonic dispersion treatment for 30 minutes to make it uniformly dispersed.

[0066] In the fourth step, under the condition of vigorous stirring, 1 part by weight (0.194 g) of bismuth nit...

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Abstract

The invention discloses a carbon nitride nano particle modified pucherite composite photocatalyst and a preparation method thereof. Carbon nitride nano particles are dispersedly compounded on the surface of porous pucherite, and the porous pucherite is composed of bent pucherite nanorods; the preparation method comprises the steps of firstly, preparing carbon nitride powder, adding the carbon nitride powder to high-purity water and performing ultrasonic dispersion, adding bismuth nitrate pentahydrate and stirring until the mixture is dissolved completely, adding ammonium metavanadate and continuing to stir, carrying out centrifugal separation, washing and drying to obtain a solid sample, then performing heat treatment, and grinding into powder. According to the carbon nitride nano particle modified pucherite composite photocatalyst, the carbon nitride nano particles are small and are dispersedly compounded on the surface of the porous pucherite, so as to be beneficial to exposure of carbon nitride-pucherite interfaces with high activity and reduction of a charge transferring distance, and therefore, the carbon nitride nano particle modified pucherite composite photocatalyst has wide application prospect in the fields such as environment pollution control and energy; besides, the preparation method of the composite photocatalyst is simple, low in cost and good in repetitiveness, and can well meet the requirement of volume production.

Description

technical field [0001] The invention relates to the field of inorganic nano photocatalyst materials, in particular to a composite photocatalyst and a preparation method thereof. Background technique [0002] With the continuous development of society, people's demand for energy is increasing day by day, and their requirements for their own living environment are also getting higher and higher. However, the world today is facing two major problems of energy crisis and environmental pollution. This is mainly because the energy sources of countries in the world are mainly fossil energy sources, such as oil, coal, and natural gas. These energy sources are formed after a long process of hundreds of millions of years and are non-renewable resources. According to the current consumption rate, fossil energy will be exhausted in the near future. At the same time, the excessive use of fossil energy, the release of harmful gases, liquid and solid pollutants have caused serious enviro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24
Inventor 巩金龙李长江王拓魏一佳张鹏李盎
Owner TIANJIN UNIV
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