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Preparation method of g-C3N4 with enhanced surface photovoltaic signal

A surface photovoltage and signal enhancement technology, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as poor controllability and cumbersome operation, and achieve short time, low price, and easy operation Effect

Active Publication Date: 2017-09-22
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods all have the disadvantages of cumbersome operation and poor controllability, and there is an urgent need to adopt simple means to improve the g-C 3 N 4 Photogenerated charge separation effect to further enhance photocatalytic performance

Method used

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  • Preparation method of g-C3N4 with enhanced surface photovoltaic signal
  • Preparation method of g-C3N4 with enhanced surface photovoltaic signal
  • Preparation method of g-C3N4 with enhanced surface photovoltaic signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In the first step, urea is used as raw material, and the g-C 3 N 4 .

[0037] In the second step, the prepared g-C 3 N 4 g-C with the aid of surfactant 3 N 4 Perform hydrothermal treatment. Specifically, take 2.5 g g-C 3 N 4 Disperse in 60 mL deionized water, then add 0.05 g PEG6000, hydrothermally treat at 180 °C for 2 hours, and cool naturally to room temperature.

[0038] In the third step, the substance obtained in the second step is washed with deionized water and then washed with alcohol for 1-2 times, the powder is taken out and dispersed in alcohol, dried at 80°C to obtain a sample, and the surface photovoltage is tested.

[0039] Compared with Comparative Example 1, Example 1 added surfactant PEG6000.

[0040] figure 2 It is a comparison chart of surface photovoltage signals of products obtained in Comparative Example 1 and Example 1. It can be seen that after the second step of surfactant PEG6000 assisted hydrothermal treatment, g-C 3 N 4 The sur...

Embodiment 2

[0042] In the first step, urea is used as raw material, and the g-C 3 N 4 .

[0043] In the second step, the prepared g-C 3 N 4 g-C with the aid of surfactant 3 N 4 Perform hydrothermal treatment. Specifically, take 2.5 g g-C 3 N 4 Disperse in 40 mL deionized water, add 0.05 g CTAB, hydrothermally treat at 160 °C for 2 hours, and cool naturally to room temperature.

[0044] In the third step, wash with deionized water and then wash with alcohol for 1-2 times, take out the powder and disperse it in alcohol, dry at 80°C to obtain a sample, and test the surface photovoltage.

[0045] Compared with Comparative Example 1, the surfactant CTAB was added in Example 2, the hydrothermal temperature was 160°C, and the water dispersion volume was 40 mL.

[0046] image 3 It is a comparison chart of surface photovoltage signals of products obtained in Comparative Example 1 and Example 2. It can be seen that after the second step of surfactant CTAB assisted hydrothermal treatment...

Embodiment 3

[0048] In the first step, urea is used as raw material, and the g-C 3 N 4 .

[0049] In the second step, the prepared g-C 3 N 4 g-C with the aid of ionic liquids 3 N 4 Perform hydrothermal treatment. Specifically, take 2.0 g g-C 3 N 4 Disperse in 50 mL of deionized water, add 0.1 g of 1-ethyl-3-methylimidazolium nitrate, hydrothermally treat at 170 ° C for 1 hour, and naturally cool to room temperature.

[0050] In the third step, wash with deionized water and then wash with alcohol for 1-2 times, take out the powder and disperse it in alcohol, dry at 80°C to obtain a sample, and test the surface photovoltage.

[0051] Compared with Comparative Example 1, in Example 3, the ionic liquid 1-ethyl-3 methylimidazolium nitrate was added, the hydrothermal temperature was 170°C, the water dispersion volume was 50 mL, and the hydrothermal treatment was performed for 1 hour.

[0052] Figure 4 It is the surface photovoltage signal diagram of the product obtained in Comparative...

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Abstract

The invention relates to the field of preparation of a chemical material, particularly to the field of a photocatalysis material, more particularly to a preparation method of graphite-like carbon nitride (g-C3N4) with an enhanced surface photovoltaic signal. The method comprises: taking urea as a raw material, performing calcination at 550 DEG C for 3h through a current semi-closed method to obtain g-C3N4; performing hydro-thermal treatment to the prepared g-C3N4 with the assistance of an ionic liquid or a surfactant, and performing natural cooling to the room temperature; washing obtained powder with deionized water and then with alcohol for 1-2 times; taking the powder out and dispersing the obtained powder in alcohol; and drying the obtained powder at 60-80 DEG C to obtain g-C3N4. The graphite-like carbon nitride (g-C3N4) material treated with the assistance of an ionic liquid or a surfactant has an enhanced surface photovoltaic signal, and is simple in preparation method, available in raw materials, and low in cost.

Description

technical field [0001] The invention relates to the field of chemical material preparation, especially the field of photocatalytic materials, specifically a g-C 3 N 4 Preparation method for surface photovoltage signal enhancement. Background technique [0002] With the development of social economy, the increasingly serious problem of environmental pollution has threatened the survival of human beings. At the same time, in recent years, the consumption of resources such as coal and oil has also brought immeasurable losses to human beings, which urgently needs a new technology for sustainable development. [0003] It has been found that semiconductor photocatalysis technology has good potential application value in environmental protection and solar energy conversion, and has been widely studied because of its mild reaction conditions, low energy consumption, less secondary pollution, and a wide range of applications. Photocatalyst (photocatalyst) is non-toxic and pollut...

Claims

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Application Information

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IPC IPC(8): C01B32/914B01J27/24B01J35/00
CPCC01B21/0605B01J27/24C01P2002/72C01P2006/40B01J35/39
Inventor 钟俊波李建章陈久福
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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