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A method for the controllable preparation of two-dimensional organic carbon nitrogen from urea

A technology of organic carbon and urea, which is applied in the field of two-dimensional organic material preparation, can solve the problems of urea failure, urea excess, and urea not being used, and achieve excellent photocatalytic performance

Active Publication Date: 2021-04-02
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition, there is a serious surplus of urea produced in industry, and a large amount of urea cannot be used in agricultural land. If it is left for a long time, the urea will become invalid and pollute the environment.

Method used

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  • A method for the controllable preparation of two-dimensional organic carbon nitrogen from urea
  • A method for the controllable preparation of two-dimensional organic carbon nitrogen from urea
  • A method for the controllable preparation of two-dimensional organic carbon nitrogen from urea

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Experimental program
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Embodiment 1

[0024] In this embodiment, two-dimensional organic carbon-nitrogen materials are controlledly prepared from urea, and the specific steps are as follows:

[0025] (1) Disperse 0.5 gram of urea powder in 30 milliliters of distilled water, and stir with ultrasonic magnetic force for 60 minutes to form a dispersion solution;

[0026] (2) transfer the precursor obtained in step (1) to 50 milliliters of Teflon-lined inner linings, and then place them in a stainless steel autoclave;

[0027] (3) Then the autoclave is sealed and kept at a high temperature of 100°C for 6 hours, then naturally cooled to room temperature;

[0028] (4) The product is filtered out, the precipitate is washed several times with distilled water, and finally dried in a vacuum oven at 80°C for 24 hours;

[0029] (5) Heat the powder obtained in step (4) to 300° C. in a nitrogen protective atmosphere in a vacuum tube furnace, and keep it warm for 1.5 hours to obtain a two-dimensional organic carbon-nitrogen mate...

Embodiment 2-6

[0031] The difference between this group of embodiments and embodiment 1 is: in the step (5), the heat preservation time is shown in the table below

[0032] Heat preservation time in table 2 embodiment 2-6 step (5)

[0033]

[0034] Wherein embodiment 2 heat preservation time is 0h, namely embodiment 2 does not have step (5), the photocatalytic performance contrast of embodiment 1-6 gained organic carbon nitrogen material sees Figure 4 , it can be seen that the photocatalytic ability of the organic carbon nitrogen material obtained in this group of examples is higher than that of the currently used C 3 N 4 It should be high, and the photocatalytic performance of the embodiment is the highest, and its hydrogen production rate is 1325.1μmol h -1 g -1 , and from Figure 4 It can be seen from d that the cycle catalytic ability of Example 1 is very good, which proves that the organic carbon nitrogen material obtained in the present invention has good stability.

Embodiment 7

[0036] The difference between this embodiment and embodiment 1 is that in step (1), the consumption of urea powder and distilled water are respectively changed to 0.3 grams of urea and 30 milliliters of distilled water.

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Abstract

The invention belongs to the technical field of the preparation of two-dimensional organic materials, and provides a method for controllably preparing two-dimensional organic carbon nitrogen from urea. The method comprises the following steps: (1) preparing a precursor; (2) preparing an organic carbon nitrogen material; and (3) performing the after-treatment for a product. In addition, the obtained organic carbon nitrogen material of different morphologies can be further prepared. The method has the characteristics of simplicity, directness, nontoxicity and harmlessness for the environment, and the prepared two-dimensional organic carbon nitrogen material has good photocatalytic performance.

Description

technical field [0001] The invention relates to a method for controllably preparing two-dimensional organic carbon nitrogen from urea, belonging to the technical field of two-dimensional organic material preparation. Background technique [0002] Two-dimensional materials can be divided into inorganic two-dimensional materials and organic two-dimensional materials. For example, inorganic two-dimensional materials include graphene, hexagonal boron nitride nanosheets and molybdenum disulfide nanosheets, etc., because of their excellent physical and chemical properties, they have attracted extensive attention from researchers. Studies have shown that they are used in electronics, lasers, biology, Catalysis, machinery and other aspects have broad application prospects. Organic two-dimensional materials, such as organic MOFs, have both the physical properties of two-dimensional materials (such as conductivity) and the flexibility of organic materials, and have the potential to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06B01J35/02B01J37/08C01B3/04
CPCB01J31/06B01J35/004B01J35/02B01J37/08C01B3/042C01B2203/1005C01B2203/1088Y02E60/36
Inventor 赵刚程艳玲徐锡金战泽宇董晓晶赵宏赵爽
Owner UNIV OF JINAN
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