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Preparation method of g-C3N4-TiO2 mesoporous composite visible light catalyst

A technology of g-c3n4-tio2 and 1.g-c3n4-tio2, which is applied in the field of preparation of g-C3N4-TiO2 mesoporous composite visible light photocatalysts, can solve the problem of unfavorable visible light catalytic activity, reduce energy level matching, improve etc. problem, to achieve the effect of simple and easy-to-control production process, low cost and high photocatalytic efficiency

Inactive Publication Date: 2016-06-01
ZHENJIANG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although such a preparation process is relatively simple, it cannot make TiO 2 fully loaded to C 3 N 4 , which reduces the energy level matching between the two, which is not conducive to the improvement of its visible light catalytic activity

Method used

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  • Preparation method of g-C3N4-TiO2 mesoporous composite visible light catalyst
  • Preparation method of g-C3N4-TiO2 mesoporous composite visible light catalyst
  • Preparation method of g-C3N4-TiO2 mesoporous composite visible light catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1, put 10g of urea in a quartz crucible, heat it in a tube furnace at 450°C for 2h under an air atmosphere, and heat up at a rate of 10°C / min to obtain a yellow powder called g-C 3 N 4 Nanosheets;

[0024] Step 2, 0.05g of g-C obtained in step 1 3 N 4 Disperse the nanosheets in 60mL acetic acid, ultrasonically disperse for 0.5h, then add 1.6mL tetrabutyl titanate, stir, ultrasonically disperse for 0.5h, transfer the solution into a stainless steel reaction kettle, seal it, and place it in a vacuum drying oven at 120°C for 24h , cooled to room temperature to obtain the reaction product;

[0025] Step 3, the reaction product obtained in step 2 is separated, washed repeatedly with deionized water and absolute ethanol, dried at 60°C under vacuum for 10 hours, and finally annealed in a tube furnace at 500°C for 2 hours to obtain a white product powder , which is g-C 3 N 4 -TiO 2 Mesoporous composite visible light photocatalyst.

[0026] figure 1 for g-C 3 N 4...

Embodiment 2

[0031] Step 1, put 10g of urea in a quartz crucible, heat it in a tube furnace at 450°C for 2h under an air atmosphere, and heat up at a rate of 10°C / min to obtain a yellow powder called g-C 3 N 4 Nanosheets;

[0032] Step 2, 0.20g of g-C obtained in step 1 3 N 4 Disperse the nanosheets in 60mL acetic acid, ultrasonically disperse for 0.5h, then add 1.6mL tetrabutyl titanate, stir, ultrasonically disperse for 0.5h, transfer the solution into a stainless steel reactor, seal it, and place it in a vacuum oven at 200°C for 24h , cooled to room temperature to obtain the reaction product;

[0033] Step 3: Separate the reaction product obtained in step 2, wash it repeatedly with deionized water and absolute ethanol, dry it under vacuum at 80°C for 10 hours, and finally anneal it in a tube furnace at 450°C for 2 hours to obtain a white product powder , which is g-C 3 N 4 -TiO 2 Mesoporous composite visible light photocatalyst.

[0034]The resulting g-C 3 N 4 -TiO 2 Mesoporo...

Embodiment 3

[0036] Step 1, put 10g of urea in a quartz crucible, heat it in a tube furnace at 450°C for 2h under an air atmosphere, and heat up at a rate of 10°C / min to obtain a yellow powder called g-C 3 N 4 Nanosheets;

[0037] Step 2, 0.1g of g-C obtained in step 1 3 N 4 Disperse the nanosheets in 60mL acetic acid, ultrasonically disperse for 0.5h, then add 1.6mL tetrabutyl titanate, stir, ultrasonically disperse for 0.5h, transfer the solution into a stainless steel reaction kettle, seal it, and place it in a vacuum drying oven at 180°C for 24h , cooled to room temperature to obtain the reaction product;

[0038] Step 3, the reaction product obtained in step 2 is separated, washed repeatedly with deionized water and absolute ethanol, dried at 60°C under vacuum for 10 hours, and finally annealed in a tube furnace at 550°C for 2 hours to obtain a white product powder , which is g-C 3 N 4 -TiO 2 Mesoporous composite visible light photocatalyst.

[0039] The resulting g-C 3 N 4 ...

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Abstract

The invention provides a preparation method of a g-C3N4-TiO2 mesoporous composite visible light catalyst. The preparation method comprises the following steps: firstly performing high-temperature annealing on urea in a quartz crucible; dispersing g-C3N4 nano sheets obtained into organic acid, adding tetrabutyl titanate, agitating, moving a solution into a reaction kettle and sealing; after thermostatic reaction, finally separating an obtained reaction product, washing, and drying, so as to obtain the g-C3N4-TiO2 mesoporous composite visible light catalyst through high-temperature annealing. The preparation method provided by the invention is low in cost, simple and easy to control in production process, high in product yield and suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a g-C 3 N 4 -TiO 2 Preparation method of mesoporous composite visible light photocatalyst. Background technique [0002] Titanium dioxide nanomaterials with anatase structure can effectively degrade organic matter in water in the ultraviolet region, which has become a hot spot in the research of photocatalytic materials and is one of the important ways to solve the current increasingly serious environmental pollution problems. However, titanium dioxide has a forbidden band width of 3.2 eV, and only absorbs 4% to 5% of ultraviolet light in the solar spectrum, so the utilization rate of visible light is low. Therefore, people have done extensive research on the modification of the morphology and properties of titanium dioxide, especially the synthesis of titanium dioxide composite materials in recent years, which can effectively enhance the functions of photocatalysis and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J21/06
CPCB01J21/063B01J27/24B01J35/39
Inventor 唐国钢
Owner ZHENJIANG COLLEGE
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