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Pholocatalyst for metallic oxide doping and preparation method thereof

A photocatalyst and oxide technology, applied in the field of photocatalysis, can solve the problem of the absence of metal oxides

Inactive Publication Date: 2017-03-15
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, g-C double-doped with metal oxides and non-metal elements does not yet exist 3 N 4 Research

Method used

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  • Pholocatalyst for metallic oxide doping and preparation method thereof
  • Pholocatalyst for metallic oxide doping and preparation method thereof
  • Pholocatalyst for metallic oxide doping and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0080](3) The preparation method provided by the invention is simple, easy to operate, and the yield of the photocatalyst product is high;

[0081] (4) The method is environmentally friendly and has no environmental pollution.

Embodiment 1～7

[0084] Accurately weigh 6 mg of sodium tetraphenylborate, put it into a dry and clean small beaker, add 10 mL of distilled water to dissolve it, then add 10.0 g of urea that has been accurately weighed, and then add 10 mL of distilled water to dissolve it completely. When heated to 80°C, put the beaker into a water bath. After the water evaporates, transfer the sample to a dry and clean crucible and place it in a box-type resistance furnace, and bake it at 550°C for 2 hours. Finely grind in a bowl to get CNB finished product.

[0085] Accurately weigh seven parts of 0.4g of the above-mentioned CNB samples and place them in seven dry and clean small beakers, numbered 1, 2, 3, 4, 5, 6, 7, and then accurately weigh seven parts of ZrO with different masses. 2 , with a mass of 0.0040g, 0.0030g, 0.0020g, 0.0010g, 0.0004g, 0.0051g and 0.0061g, respectively, and then add them to the above seven small beakers in sequence, and finally add 10mL of ethanol to the seven beakers in turn , ...

experiment example 1

[0096] Infrared spectrum characterization of experimental example 1 sample

[0097] The samples used in this experimental example were prepared from Examples 1-7 and Comparative Example 2.

[0098] 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.

[0099] Take a small amount of the above-mentioned sample powders, add them into potassium bromide powders respectively, grind them until they are evenly mixed, press them into thin slices, and use a Fourier transform infrared spectrometer to characterize the catalysts by infrared spectroscopy. The results are as follows: figure 1 shown, where

[0100] Curve a represents ZrO 2 The in...

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PUM

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Abstract

The invention provides a pholocatalystfor metallic oxide doping and a preparation method of the pholocatalyst. The method comprises the steps of doping non-metal elements in g-C3N4 to form the g-C<3>N<4> doped with non-metal elements, doping metallic oxide especially the second transition metallic oxide to obtain the codope g-C3N4 pholocatalyst. The pholocatalyst possesses an obviously enhanced degradation rate of azo dyes under visible spectrum. As an example, helianthin B is under degradation in ultraviolet with the help of the pholocatalyst, and one hour later the degradation rate can reach over 80%.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and relates to a metal oxide-doped CN photocatalyst and a preparation method thereof. Background technique [0002] Graphite phase carbon nitride (abbreviated as g-C 3 N 4 ) is a new type of photocatalytic material due to its high photocatalytic activity, good stability, and cheap raw material prices. However, single-phase catalysts usually have unsatisfactory photocatalytic performance due to low quantum efficiency. 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. [0003] To improve g-C 3 N 4 In recent years, many modification methods have been studied. Currently, non-metal elements are usually used for g-C 3 N 4 For modification, the non-metallic elements used for modification mainly include S, B, F, P, etc. It is generally believed that these non-metallic elements rep...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/32C02F1/72C02F101/34C02F101/38
CPCC02F1/32C02F1/725B01J27/24C02F2305/10C02F2305/023C02F2101/308C02F2101/34C02F2101/38C02F2101/40B01J35/39
Inventor 崔玉民李慧泉苗慧陶栋梁
Owner FUYANG NORMAL UNIVERSITY
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