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

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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 pho

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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