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G-C3N4/activated carbon compound photo-catalyst as well as preparation method and application of g-C3N4/activated carbon compound photo-catalyst

A technology of g-c3n4 and activated carbon, which is applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as ineffective use of sunlight, high exciton binding energy, and large band gap , to achieve maximum application value, increase specific surface area, and improve dispersion

Inactive Publication Date: 2015-02-18
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]However, g-C3N4 polymers still have some problems as photocatalysts, such as small specific surface area, The exciton binding energy of photogenerated carriers is high, the quantum efficiency is low, and the band gap is too large (λ<460 nm), so it cannot effectively use sunlight, etc.

Method used

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  • G-C3N4/activated carbon compound photo-catalyst as well as preparation method and application of g-C3N4/activated carbon compound photo-catalyst
  • G-C3N4/activated carbon compound photo-catalyst as well as preparation method and application of g-C3N4/activated carbon compound photo-catalyst
  • G-C3N4/activated carbon compound photo-catalyst as well as preparation method and application of g-C3N4/activated carbon compound photo-catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) The powdery activated carbon is boiled and cleaned with 0.01mol / L nitric acid, then washed with distilled water until neutral, and dried in an oven to constant weight;

[0019] (2) Get the gac of a certain amount of step (1) and mix with urea and ammonium chloride, fully grind; Move in the tubular quartz reactor, under the protection of high-purity nitrogen, in the rotary kiln, rise to the speed of 5 ℃ / min 210°C, and keep the temperature for 10 minutes; then rise to 240°C at a rate of 1°C / min, and hold the temperature for 20 minutes; then rise to 250°C at a rate of 0.1°C / min, and hold the temperature for 30 minutes; then rise to 2°C / min at a rate of 480°C, keep the temperature for 1h, then raise it to 550°C at a rate of 1°C / min, and keep the temperature for 2h, then cool it down to room temperature and take it out to obtain the g-C 3 N 4 / Activated carbon composite photocatalyst, wherein the content of activated carbon is 3%.

Embodiment 2

[0021] (1) Boil and clean the powdered activated carbon with 0.01mol / L nitric acid, then wash it with distilled water until neutral, and dry it in an oven to constant weight;

[0022] (2) Get the gac of a certain amount of step (1) and mix with urea and ammonium chloride, fully grind; Move in the tubular quartz reactor, under the protection of high-purity nitrogen, in the rotary kiln, rise to the speed of 5 ℃ / min 210°C, and keep the temperature for 10 minutes; then rise to 240°C at a rate of 1°C / min, and hold the temperature for 20 minutes; then rise to 250°C at a rate of 0.1°C / min, and hold the temperature for 30 minutes; then rise to 2°C / min at a rate of 480°C, keep the temperature for 1h, then raise it to 550°C at a rate of 1°C / min, and keep the temperature for 2h, then cool it down to room temperature and take it out to obtain the g-C 3 N 4 / Activated carbon composite photocatalyst, wherein the content of activated carbon is 8%.

[0023] figure 1 for g-C 3 N 4 and g-...

Embodiment 3

[0028] (1) Boil and clean the powdered activated carbon with 0.01mol / L nitric acid, then wash it with distilled water until neutral, and dry it in an oven to constant weight;

[0029] (2) get the gac of a certain amount of step (1) and mix with urea and ammonium chloride, fully grind; Move in the tubular quartz reactor, under the protection of high-purity nitrogen, in the rotary kiln, rise to the speed of 5 ℃ / min 210°C, and keep the temperature for 10 minutes; then rise to 240°C at a rate of 1°C / min, and hold the temperature for 20 minutes; then rise to 250°C at a rate of 0.1°C / min, and hold the temperature for 30 minutes; then rise to 2°C / min at a rate of 480°C, keep the temperature for 1h, then raise it to 550°C at a rate of 1°C / min, and keep the temperature for 2h, then cool it down to room temperature and take it out to obtain the g-C 3 N 4 / Activated carbon composite photocatalyst, wherein the content of activated carbon is 15%.

[0030] Catalytic degradation experiment...

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Abstract

The invention discloses a g-C3N4 / activated carbon compound photo-catalyst as well as a preparation method and application of the g-C3N4 / activated carbon compound photo-catalyst. Powdered activated carbon, urea and ammonia chloride are taken as raw materials, and the g-C3N4 / activated carbon compound photo-catalyst is prepared by grinding and temperature programmed treatment. The g-C3N4 / activated carbon compound photo-catalyst is good in dispersibility, high in catalytic activity, long in service life and cannot inactivate easily, and has a great potential application value in advanced treatment of organic polluted water.

Description

technical field [0001] The invention belongs to the field of preparation of photocatalysts, in particular to a g-C 3 N 4 / Activated carbon composite photocatalyst and its preparation method and application. Background technique [0002] In 2009, Chinese scientists cooperated with German and Japanese scientists to discover a conjugated polymer graphite phase carbon nitride (g-C 3 N 4 ) visible light photocatalytic materials, and using density functional theory (DFT) and electrochemical methods to study the energy band structure of carbon nitride, found that g-C 3 N 4 With a typical semiconductor band structure, sp 2 Hybridized N 2 p orbital composition g-C 3 N 4 The highest occupied molecular orbital (HOMO) of the C 2 p The hybrid orbital constitutes its lowest unoccupied molecular orbital (LUMO), with a band gap of about 2.7eV and a specific surface area of ​​10 m 2 / g, in lambda Under the induction of > 387 nm visible light, it can catalyze redox reactions...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/30
Inventor 陈孝云陈星陆东芳常鼎伟高骁敏叶红华月钿
Owner FUJIAN AGRI & FORESTRY UNIV
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