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Strontium oxide cluster-modified amorphous carbon nitride photocatalyst and preparation method thereof

A photocatalyst and amorphous technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of increased preparation costs, harsh preparation conditions, etc., to improve performance and solve high preparation costs , excellent performance

Active Publication Date: 2019-06-28
CHONGQING TECH & BUSINESS UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to statistics, the current preparation method of amorphous carbon nitride is prepared by high-temperature secondary heat treatment. The preparation conditions of this preparation method are relatively strict, and the secondary heat treatment will increase the preparation cost of amorphous carbon nitride. Therefore, It is necessary to find a simple, economical and efficient method for preparing amorphous carbon nitride

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  • Strontium oxide cluster-modified amorphous carbon nitride photocatalyst and preparation method thereof
  • Strontium oxide cluster-modified amorphous carbon nitride photocatalyst and preparation method thereof
  • Strontium oxide cluster-modified amorphous carbon nitride photocatalyst and preparation method thereof

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preparation example Construction

[0042] Please refer to the attached figure 1 , the preparation method of the strontium oxide cluster modified amorphous carbon nitride photocatalyst shown in the embodiment of the present application comprises the following steps:

[0043] S101 Add 10ml of deionized water, 10g of urea and strontium carbonate into the crucible, and mix uniformly to obtain the photocatalyst precursor;

[0044] S102 recrystallize the photocatalyst precursor to obtain a recrystallized product;

[0045] S103 heat-treating the recrystallized product to obtain an amorphous carbon nitride photocatalyst decorated with strontium oxide clusters.

[0046] Please refer to the attached figure 2 , the preparation method of the strontium oxide cluster modified amorphous carbon nitride photocatalyst shown in another embodiment of the present application comprises the following steps:

[0047] S201 Add 10ml of deionized water and 10g of urea into the crucible to obtain the photocatalyst precursor

[0048] ...

Embodiment 1

[0079]Add 10g of urea and 0.06g of strontium carbonate to a 50mL crucible containing 30mL of deionized water, mix them, and disperse them uniformly to obtain a photocatalyst precursor; then recrystallize the precursor in an oven at 60°C; The obtained recrystallized product was heat-treated at 550°C for 2 hours at a heating rate of 15°C / min in a muffle furnace. After the heat treatment, an amorphous carbon nitride photocatalyst decorated with strontium oxide clusters with an added amount of strontium carbonate of 0.06g was obtained. (SCO-U-0.06).

[0080] The amorphous carbon nitride photocatalyst (SCO-U-0.06) modified by strontium oxide clusters with an addition amount of 0.06 g of strontium carbonate prepared in Example 1 of the present application was tested by XPS, XRD, FT-IR, SEM, TEM, HRTEM, Characterized by BET-BJH, PL, time-resolved fluorescence, photocurrent, UV-Vis DRS, and in situ infrared.

[0081] The amorphous carbon nitride photocatalyst (SCO-U-0.06) modified by...

Embodiment 2

[0083] Add 10g of urea and 0.1g of strontium carbonate to a 50mL crucible containing 30mL of deionized water, mix them, and disperse them evenly to obtain a photocatalyst precursor; then recrystallize the precursor in an oven at 60°C; The obtained recrystallized product was heat-treated at 550°C for 2 hours at a heating rate of 15°C / min in a muffle furnace. After the heat treatment, an amorphous carbon nitride photocatalyst decorated with strontium oxide clusters with an addition of 0.1 g of strontium carbonate was obtained. (SCO-U-0.1).

[0084] The characterization of the strontium oxide cluster-modified amorphous carbon nitride photocatalyst (SCO-U-0.1) prepared in Example 2 of the present application with an addition of 0.1 g of strontium carbonate and the NO degradation test process are the same as in Example 1. It is calculated that the NO degradation rate of the SCO-U-0.1 photocatalyst prepared in Example 2 of the present application is 49.8%.

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Abstract

This application discloses a strontium oxide cluster-modified amorphous carbon nitride photocatalyst and its preparation method. The preparation method includes the following steps: S101 Add 10ml of deionized water, 10g of urea and strontium carbonate to the crucible, and mix evenly Finally, a photocatalyst precursor is obtained; S102 recrystallizes the photocatalyst precursor to obtain a recrystallized product; S103 heat-treats the recrystallized product to obtain an amorphous carbon nitride photocatalyst modified with strontium oxide clusters. The method shown in this application is an in-situ thermal polymerization process. Through analysis and experiments, it can be seen that during the in-situ heat treatment process, strontium carbonate tends to react with hydrogen bonds in the graphene-type carbon nitride layer, causing the hydrogen bonds to break to form amorphous carbon nitride, and the formed strontium oxide clusters are modified The amorphous carbon nitride photocatalyst promotes the migration and transformation of photogenerated carriers due to its unique amorphous structure and the modification of strontium oxide clusters. It is also conducive to the adsorption and conversion of NO, greatly improving the removal rate of NO.

Description

technical field [0001] The present application relates to the technical field of photocatalyst preparation, and more specifically, relates to an amorphous carbon nitride photocatalyst decorated with strontium monoxide clusters and a preparation method thereof. Background technique [0002] With the advancement of human science and technology civilization, the industry has developed on a large scale, and automobiles have become more and more popular, and a large amount of nitrogen oxides have been discharged into the atmosphere. Nitrogen oxides are pollutants of photochemical smog, acid rain, and ozone layer destruction. Nitrogen oxides have become air pollutants that need to be solved urgently in countries all over the world. Visible light-driven photocatalysis, as an environmentally friendly green technology, has shown good application prospects in both environmental pollution purification and solar energy conversion. The photocatalytic method driven by visible light can o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01D53/86B01D53/56
CPCB01D53/8628B01J27/24B01J35/39
Inventor 董帆崔雯李欣蔚孙艳娟
Owner CHONGQING TECH & BUSINESS UNIV
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