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Photocatalyst graphite oxide phase carbon nitride and preparation method thereof

A graphitic carbon nitride and photocatalyst technology, applied in the field of photocatalysis, can solve the problems of low catalytic efficiency, low photo-generated electron-hole recombination rate, low quantum efficiency and the like

Inactive Publication Date: 2017-05-10
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Graphite carbon nitride is a new type of photocatalyst due to its high photocatalytic activity, good stability, low raw material price, and especially the absence of metals. However, single-phase catalysts usually suffer from quantum efficiency The low photocatalytic performance is not ideal
[0004] The photogenerated electron-hole recombination rate of bulk graphitic carbon nitride materials is high, resulting in low catalytic efficiency, which limits its application in photocatalysis
[0005] Therefore, it is urgent to develop a graphitic carbon nitride material with a low photogenerated electron-hole recombination rate.

Method used

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  • Photocatalyst graphite oxide phase carbon nitride and preparation method thereof
  • Photocatalyst graphite oxide phase carbon nitride and preparation method thereof
  • Photocatalyst graphite oxide phase carbon nitride and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Accurately weigh 6.0g of dicyandiamide, place it in a cleaned crucible, cover it, and then roast it in a muffle furnace at 550°C for 4h, grind it in an agate grinding body after roasting, and then put it into After the bag is sealed well, the g-C3N4 photocatalyst solid powder can be prepared, which is marked as Bulkg-C 3 N 4 .

[0056] (2) Take by weighing 1.000g of the photocatalyst powder that step 1 makes, measure the concentration of 98% H with a 100mL graduated cylinder 2 SO 4 100mL in a 250mL beaker, weigh K with a balance 2 Cr 2 o 7 Solid 20.000g add the above H 2 SO 4 solution, and then use a magnetic stirrer to stir immediately. After the color of the mixed solution turns brown, add the above-weighed g-C 3 N 4 The photocatalyst powder was put into the mixed solution and stirred for 2h until the system dropped to room temperature.

[0057] Slowly pour the cooled mixture into 800mL of distilled water, cool to room temperature, and then centrifuge the ...

experiment example 1

[0062] The XRD spectrum analysis of experimental example 1 sample

[0063] The samples used in this experimental example were prepared in Example 1 and Comparative Example 1.

[0064] Using Bruker D8 Advance type X-ray diffractometer (XRD), copper target (Cu Kα (λ=0.154nm)) rays, Ni filter, working voltage 40kV, current 40mA, scanning range 2θ=10°~60°, analysis The crystal phase structure of the sample, the results are as follows figure 1 As shown, among them,

[0065] Curve 1 shows the XRD spectrogram of the sample that embodiment 1 makes;

[0066] Curve 2 shows the XRD spectrum of the sample prepared in Comparative Example 1.

[0067] The diffraction peaks at diffraction angles 2θ=12° and 27° correspond to g-C 3 N 4 The (100) and (002) crystal planes are used to identify the graphite phase g-C 3 N 4 characteristic diffraction peaks.

[0068] Depend on figure 1 It can be seen that the above-mentioned diffraction peaks exist in the XRD spectrum of the sample prepare...

experiment example 2

[0070] The infrared spectroscopic analysis of experimental example 2 samples

[0071] The samples used in this experimental example were prepared in Example 1 and Comparative Example 1.

[0072] Take a small amount of the above-mentioned powder sample, add a small amount of potassium bromide powder respectively, grind the sample and potassium bromide to mix evenly, press into thin slices, and carry out infrared spectrum characterization of the catalyst with a Fourier transform infrared spectrometer, the results are as follows figure 2 As shown, among them,

[0073] Curve 1 shows the infrared spectrogram of the sample that embodiment 1 makes;

[0074] Curve 2 shows the infrared spectrogram of the sample prepared in Comparative Example 1.

[0075] Depend on figure 2 It can be seen that the infrared spectrograms of the photocatalysts made in embodiment 1 and comparative example 1 are respectively at a wave number of 3300cm -1 ~3600cm -1 , at a wavenumber of 1200cm -1 ~1...

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Abstract

The invention provides photocatalyst graphite oxide phase carbon nitride and a preparation method thereof. The photocatalyst is graphite phase carbon nitride prepared by roasting a carbon and nitrogen source; an oxidant is added for oxidizing and then is removed; finally, the photocatalytic degradation efficiency of the prepared graphite oxide phase carbon nitride to organic dye is remarkably improved.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a method for preparing photocatalyst oxidized graphite phase carbon nitride. Background technique [0002] As a "green" technology, photocatalytic technology has many advantages incomparable with traditional water pollution treatment technologies in terms of water pollution control: (1) easy operation and low energy consumption; (2) photocatalytic reaction is general It can be carried out under normal temperature and pressure conditions, the required reaction conditions are mild, and inorganic and organic pollutants can be partially or completely degraded, so that many environmental pollutants can be degraded to generate H 2 O and CO 2 , will not produce secondary pollution; (3) sunlight can be used as a light source; (4) some photocatalysts are low in cost, low in toxicity or even non-toxic, high in stability and can be reused. Photocatalytic technology can not only be used to de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30C02F101/34C02F101/38
CPCC02F1/30B01J27/24C02F2305/10C02F2101/38C02F2101/34C02F2101/308B01J35/39Y02W10/37
Inventor 李慧泉崔玉民苗慧
Owner FUYANG NORMAL UNIVERSITY
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