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Multi-shell graphite phase carbon nitride hollow nanosphere and synthesis method and application thereof

A technology of graphite phase carbon nitride and hollow nanometers, which is applied in the direction of nitrogen compounds, chemical instruments and methods, nitrogen and non-metallic compounds, etc., to achieve the effects of facilitating utilization, shortening the transmission path, and making the preparation method simple and controllable

Inactive Publication Date: 2017-05-31
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But since g-C 3 N 4 The characteristics of the polymer material and the special synthesis process, the synthesis of its nanostructure is a challenge, which needs to be further designed and prepared

Method used

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  • Multi-shell graphite phase carbon nitride hollow nanosphere and synthesis method and application thereof
  • Multi-shell graphite phase carbon nitride hollow nanosphere and synthesis method and application thereof
  • Multi-shell graphite phase carbon nitride hollow nanosphere and synthesis method and application thereof

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Embodiment 1

[0027] Embodiment 1, double shell g-C 3 N 4 The synthetic method of hollow nanosphere comprises the following steps:

[0028] Step 1. At room temperature, configure solution A containing 0.5ml of ammonia water, 30ml of ethanol, and 75ml of deionized water, add 80mg of surfactant CTAB to it, and continue stirring for 1 hour; mix 0.0625ml of TEOS and 0.0625ml of BTSE , was added to the above solution A under the condition of rapid stirring, so that the molar ratio of TEOS to ethanol was kept at 1:921. After stirring for 24 hours, add 0.0625ml of TEOS and 0.0625ml of BTSE again, continue stirring for 24 hours to obtain a suspension, centrifuge the suspension to obtain silicone balls, hollow the silicon balls by hydrothermal treatment, and remove CTAB by acid treatment. Double shell SiO 2 Hollow nanospheres, such as figure 1 As shown, it can be seen that SiO 2 The nanospheres present a hollow structure. In the present invention, in this step, according to the difference in t...

Embodiment 2

[0031] Embodiment 2, triple shell g-C 3 N 4 The synthesis of hollow nanospheres, its steps are basically the same as in Example 1, the difference is only: in the process of forming organosilicon spheres in step 1, an equal volume of TEOS and BTSE was added once more, and stirring was continued for 24 hours, that is, a total of The process of adding equal volumes of TEOS and BTSE and stirring for 24 hours was carried out three times, and the three-shelled g-C was finally prepared. 3 N 4 Hollow nanosphere, and denoted as TS-g-C 3 N 4 . Figure 2(c) shows the TS-g-C 3 N 4 The TEM photo of the TS-g-C in Fig. 2(d) 3 N 4 The mapping spectrum, it can be seen that the prepared TS-g-C 3 N 4 It presents a hollow and multi-shell structure, and the carbon and nitrogen elements are evenly distributed throughout the hollow sphere; the particle size is 300-400nm, and the shell spacing is about 20-40nm.

[0032] image 3 It is the single, double and triple shell g-C prepared in Com...

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Abstract

The invention discloses a multi-shell graphite phase carbon nitride hollow nanosphere and a synthesis method thereof. The outer diameter of a g-C3N4 hollow nanosphere is 300nm to 400nm; the shell space is 20 to 40nm; the shell thickness is 20 to 50nm; the inner diameter of the innermost layer is 150 to 180 nm; in addition, mesoporous structures are distributed on the surface of each shell. The method comprises the following steps of preparing melamine / cyanuric acid suspension liquid and urea water solution; using the melamine / cyanuric acid suspension liquid for preparation to obtain melamine / cyanuric acid macromolecular crystals completing the assembling reaction; adding the crystals into the urea water solution; performing calcination on a prepared urea-(melamine / cyanuric acid) composite precursor to obtain the g-C3N4 homotype heterojunction photocatalysis material of a multilayer structure with g-C3N4 nanometer particles deposited on the g-C3N4 nanometer tubes. The synthesis conditions are mild; the process is simple and convenient; the controllability is high; the obtained photocatalysis material is applied to methyl orange degradation in visible light; the effect is obvious.

Description

technical field [0001] The present invention relates to a kind of multi-shell graphite phase carbon nitride (g-C 3 N 4 ) The synthesis of hollow nanospheres belongs to the synthesis and structure modification of photocatalytic materials, and can be applied to the degradation of organic pollutants. Background technique [0002] Semiconductor photocatalysis technology drives a series of important chemical reactions through sunlight, converts low-density solar energy into high-density chemical energy or directly degrades and mineralizes organic pollutants, which plays an important role in solving energy shortages and environmental pollution. Application prospect. TiO 2 Due to its low price and stable chemical properties, it has become the most widely studied and applied catalyst. But TiO 2 The band gap is wide, and it can only absorb ultraviolet light with a wavelength less than 387nm, which limits its utilization efficiency of solar energy. At the same time, the developm...

Claims

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Application Information

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IPC IPC(8): C01B21/082C02F1/30B01J27/24C02F101/30
CPCC01B21/0605C02F1/30B01J27/24C01P2004/34C01P2004/62C02F2101/308B01J35/51B01J35/40B01J35/39
Inventor 姜忠义佟振伟杨冬
Owner TIANJIN UNIV
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