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Metal element doped CNB photocatalyst and preparation method thereof

A metal element, photocatalyst technology, applied in the field of photocatalysis, can solve the problems of limited application, low catalytic efficiency, low quantum efficiency, etc.

Inactive Publication Date: 2017-04-26
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] g-C 3 N 4 With its outstanding advantages of high photocatalytic activity, good stability, cheap raw materials, and especially no metal, it has become a new type of photocatalytic material. However, single-phase catalysts usually have low quantum efficiency. The photocatalytic performance is not ideal, because g-C 3 N 4 The high photogenerated electron-hole recombination rate of the material leads to its low catalytic efficiency, which limits its application in photocatalysis

Method used

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  • Metal element doped CNB photocatalyst and preparation method thereof
  • Metal element doped CNB photocatalyst and preparation method thereof
  • Metal element doped CNB photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0070] (1) Preparation of boron-doped graphitic carbon nitride (CNB): Weigh 20.000g of urea, put it into a dry and clean small beaker, measure 10mL of distilled water with a graduated cylinder, add it to the small beaker to dissolve it, and then add Accurately weighed sodium tetraphenylborate 5.0mg, when the water bath is heated to 80°C, put the beaker in the water bath to remove the distilled water, after the water in the beaker is evaporated, transfer the sample to a dry and clean crucible, use crucible tongs Move it into a muffle furnace, bake at 550°C for 2 hours, cool to room temperature, and grind to obtain a CNB sample, put it in a sample bag, and seal it, which is CNB.

[0071] (2) Preparation of palladium nitrate solution: 1.000g of palladium nitrate dihydrate powder was dissolved in distilled water, then moved to a 500mL volumetric flask, and prepared into Pd(NO 3 ) 2 solution, the concentration of the solution is C x (The calculation formula is C x V=m / M [二水合硝酸钯...

experiment example 1

[0081] XRD characterization of experimental example 1 sample

[0082] The samples used in this experimental example were prepared from Examples 1-3 and Comparative Examples 1 and 2.

[0083] This experimental example adopts Bruker D8 Advance X-ray diffractometer (XRD), copper target (Cu Kα (λ=0.154nm)) rays, Ni filter, working voltage 40kV, current 40mA, scanning range 2θ=10°-70 °, analyze the crystal phase structure of the sample, the results are as follows figure 1 As shown, among them,

[0084] Curve a represents the XRD spectral line of the sample prepared in Comparative Example 1;

[0085] Curve b represents the XRD spectrum line of the sample prepared in Comparative Example 2;

[0086] Curve c represents the XRD line of sample that embodiment 3 makes;

[0087] Curve d represents the XRD line of sample that embodiment 1 makes;

[0088] Curve e represents the XRD line of the sample prepared in Example 2.

[0089] Depend on figure 1 It can be seen that the stronges...

experiment example 2

[0093] Infrared spectrum characterization of experimental example 2 sample

[0094] Infrared spectroscopy is used to measure that when a sample is irradiated by infrared light of continuously changing frequency, the molecule absorbs radiation of certain frequencies, and the change of dipole moment is caused by its vibration or bending motion, which causes the energy level to change from the ground state to the excited state. Transition, thus forming molecular absorption spectrum.

[0095] The samples used in this experimental example were prepared from Examples 1-3 and Comparative Examples 1 and 2.

[0096] Take a small amount of the above-mentioned photocatalyst sample, add a small amount of potassium bromide powder respectively, grind until mixed evenly, press into thin slices, and use a Fourier transform infrared spectrometer to carry out infrared spectrum characterization of the catalyst, the results are as follows figure 2 As shown, among them,

[0097] Curve a repre...

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Abstract

The invention provides a metal element doped CNB photocatalyst. According to the metal element doped CNB photocatalyst, metal elements and non-metal elements B are used for jointly doping graphite phase carbon nitride, and compared with pure graphite phase nitridation, prepared double-doped graphite phase carbon nitride has high visible-light catalytic activity to organic dyestuff. The invention further provides a preparation method of the catalyst. CNB is prepared through the method, the prepared CNB is compounded with the metal elements, the method is easy to operate, and the yield of the catalyst is high.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and relates to a CNB photocatalyst doped with metal elements and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of industrial production, the problem of environmental pollution has been widely concerned by people. With the continuous improvement of industrial pollution control technology, photocatalytic technology, that is, the use of solar energy to photocatalytically degrade pollutants, has been studied more and more deeply in environmental governance. [0003] Another way to study photocatalysts is to find new photocatalysts. [0004] g-C 3 N 4 With its outstanding advantages of high photocatalytic activity, good stability, cheap raw materials, and especially no metal, it has become a new type of photocatalytic material. However, single-phase catalysts usually have low quantum efficiency. The photocatalytic performance is not ideal, bec...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/34
CPCB01J27/24B01J37/345B01J35/39
Inventor 崔玉民李慧泉苗慧陶栋梁
Owner FUYANG NORMAL UNIVERSITY
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