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Preparation method and application of g-C3N4/CaIn2S4 visible light compound photocatalyst

A C3N4, cain2s4 technology, applied in the direction of light water/sewage treatment, energy wastewater treatment, etc., can solve the problems of inability to effectively absorb visible light, reduce the utilization rate of light energy, and low photocatalytic efficiency, and achieve uniform appearance and low cost , the effect of high photocatalytic activity

Inactive Publication Date: 2015-10-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although some achievements have been made in photocatalytic research, there are still many problems in practical application: (1) photogenerated electron-hole pairs are easy to recombine, and the overall photocatalytic efficiency is low; (2) most photocatalyst materials have relatively low bandgap Wide, unable to effectively absorb the visible light part, reducing the utilization rate of light energy

Method used

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  • Preparation method and application of g-C3N4/CaIn2S4 visible light compound photocatalyst
  • Preparation method and application of g-C3N4/CaIn2S4 visible light compound photocatalyst
  • Preparation method and application of g-C3N4/CaIn2S4 visible light compound photocatalyst

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Embodiment 1

[0032] a g‐C 3 N 4 / CaIn 2 S 4 The preparation method of visible light composite photocatalyst comprises the following steps:

[0033] (1) Add 0.12g of g-C 3 N 4Dissolve the powder in 60ml of deionized water, ultrasonically disperse for 20min, then add 10mmol of calcium nitrate and 20mmol of indium nitrate to obtain a mixed solution, then add 80mmol of thioacetamide to it, and stir for 30min at a speed of 600r / min;

[0034] (2) Transfer the suspension prepared in step (1) to an autoclave, and conduct a hydrothermal reaction at 160° C. for 16 hours. After the reaction, cool naturally to room temperature;

[0035] (3) Centrifuge the product of step (2) at a centrifugal rate of 9000r / min, wash the precipitate obtained after centrifugation with deionized water until neutral, then wash with absolute ethanol for 3 times, and dry at 80°C for 6h , to give 3 wt% g‐C after grinding 3 N 4 / CaIn 2 S 4 Visible light composite photocatalyst.

[0036] figure 1 Is the g‐C prepared...

Embodiment 2

[0041] a g‐C 3 N 4 / CaIn 2 S 4 The preparation method of visible light composite photocatalyst comprises the following steps:

[0042] (1) Add 0.1g of g-C 3 N 4 Dissolve the powder in 60ml of deionized water, ultrasonically disperse for 20min, then add 5mmol of calcium nitrate and 10mmol of indium nitrate to obtain a mixed solution, stir evenly, then add 40mmol of thioacetamide to it, stir for 30min, and rotate at a speed of 500r / min;

[0043] (2) Transfer the suspension prepared in step (1) to an autoclave, and conduct a hydrothermal reaction at 120° C. for 24 hours. After the reaction, cool naturally to room temperature;

[0044] (3) Centrifuge the product of step (2) at a centrifugal rate of 9000r / min, wash the precipitate obtained after centrifugation with deionized water until neutral, then wash with absolute ethanol 3 times, and dry at 90°C for 4h , to give 5 wt% g‐C after grinding 3 N 4 / CaIn 2 S 4 Visible light composite photocatalyst.

[0045] g-C in this e...

Embodiment 3

[0047] (1) Add 0.14g of g-C 3 N 4 Dissolve the powder in 60ml of deionized water, ultrasonically disperse for 20min, then add 5mmol of calcium nitrate and 10mmol of indium nitrate to obtain a mixed solution, stir evenly, then add 40mmol of thioacetamide to it, stir for 30min, and rotate at 600r / min;

[0048] (2) Transfer the suspension prepared in step (1) to an autoclave, and conduct a hydrothermal reaction at 160° C. for 16 hours. After the reaction, cool naturally to room temperature;

[0049] (3) Centrifuge the product of step (2) at a centrifugal rate of 8500r / min, wash the precipitate obtained after centrifugation with deionized water until neutral, then wash with absolute ethanol 3 times, and dry at 90°C for 4h , 7 wt% g‐C was obtained after grinding 3 N 4 / CaIn 2 S 4 Visible light composite photocatalyst.

[0050] g-C in this example 3 N 4 / CaIn 2 S 4 X-ray diffraction pattern, transmission electron microscope pattern, N 2 The adsorption isotherm curves and ...

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Abstract

The invention discloses a preparation method and application of a g-C3N4 / CaIn2S4 visible light compound photocatalyst. The method comprises the following steps: dissolving a certain amount of g-C3N4 powder in deionized water; adding calcium nitrate and indium nitrate, and stirring uniformly so as to obtain suspension liquid; finally adding excessive thioacetamide, and stirring until the thioacetamide is completely dissolved to obtain a solution; moving the solution into a high-pressure kettle for hydrothermal reaction to obtain a product; and after the reaction is finished, centrifuging the product, washing, drying and grinding so as to obtain the g-C3N4 / CaIn2S4 visible light compound photocatalyst. According to the method, a hydrothermal synthesis method is adopted for preparing the g-C3N4 / CaIn2S4 visible light compound photocatalyst; the preparation method is simple, the cost is low, and no pollution discharge exists in the preparation process; the prepared photocatalyst has good photocatalysis activity, and can be effectively applied to degradation of organic dye pollutants in waste water.

Description

technical field [0001] The invention belongs to the technical field of preparation of photocatalytic materials, and in particular relates to a visible light-responsive g-C 3 N 4 / CaIn 2 S 4 Composite photocatalyst and its preparation method and application. Background technique [0002] With the rapid development of human society, human beings have an increasing demand for energy, while traditional energy such as coal and oil are non-renewable energy sources, and their storage capacity is becoming less and less. And the environmental problems caused by non-renewable energy such as coal and oil are becoming more and more prominent. The sulfur oxides and nitrogen oxides produced by them have caused huge damage to the environment on which human beings depend. For the sustainable development of human society, it is necessary to develop and utilize renewable energy that can satisfy human life and does not pollute the environment. [0003] Renewable energy includes solar ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30
CPCY02W10/37
Inventor 袁文辉杨赛李莉
Owner SOUTH CHINA UNIV OF TECH
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