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Synthesis method of a kind of graphitic carbon nitride/stannous sulfide nano-heterojunction

A synthesis method, a technology of heterojunction, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., to achieve the effects of excellent photocatalytic performance, easy operation, and simple synthesis process

Active Publication Date: 2019-11-19
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention selects SnS and g-C with different bandgap widths 3 N 4 system, the SnS band gap value is small, and it has good light absorption performance under visible light conditions, and g-C is synthesized by thermal polymerization 3 N 4 nanopowder, and then in situ synthesis of nano g-C by precipitation method 3 N 4 / SnS heterojunction, the product is expected to obtain excellent photocatalytic performance under visible light conditions, however g-C 3 N 4 / SnS heterogeneous combination method has not been reported yet

Method used

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  • Synthesis method of a kind of graphitic carbon nitride/stannous sulfide nano-heterojunction
  • Synthesis method of a kind of graphitic carbon nitride/stannous sulfide nano-heterojunction
  • Synthesis method of a kind of graphitic carbon nitride/stannous sulfide nano-heterojunction

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Experimental program
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Effect test

Embodiment 1

[0029] (1) Weigh a certain amount of urea, grind it in an agate mortar and transfer it to a corundum crucible;

[0030] (2) Cover the corundum crucible in step (1) and place it in a muffle furnace for calcination. The heating rate is 3°C / min, the holding temperature is 600°C, and the holding time is 4h. After cooling to room temperature, take it out and collect the product gC 3 N 4 ;

[0031] (3) Weigh a certain amount of SnCl 2 ·2H 2 O is dissolved in deionized water, and uniform SnCl is obtained after thorough stirring 2 Solution, Sn in the resulting solution 2+ The concentration is 0.2mol / L, in SnCl 2 Add a certain amount of g-C to the solution 3 N 4 Nanopowder, stir and mix well, record it as suspension A;

[0032] (4) Weigh a certain amount of sodium sulfide and dissolve it in the solvent water, so that the S 2- The concentration is 0.2 mol / L, and then Na 2 The S solution was added to the suspension A prepared in step (3) at a dropping rate of 0.5 ml / min, and stirred for 2 hours...

Embodiment 2

[0038] (1) Weigh a certain amount of urea, grind it in an agate mortar and transfer it to a corundum crucible;

[0039] (2) Cover the corundum crucible in step (1) and place it in a muffle furnace for calcination. The heating rate is 4℃ / min, the holding temperature is 570℃, and the holding time is 3h. After cooling to room temperature, take it out and collect the product g-C 3 N 4 ;

[0040] (3) Weigh a certain amount of SnCl 2 ·2H 2 O is dissolved in deionized water, and uniform SnCl is obtained after thorough stirring 2 Solution, Sn in the resulting solution 2+ The concentration is 0.2mol / L, in SnCl 2 Add a certain amount of g-C prepared in step (2) to the solution 3 N 4 Nanopowder, stir and mix well; mark it as suspension A;

[0041] (4) Weigh a certain amount of sodium sulfide and dissolve it in the solvent water, so that the S 2- The concentration is 0.2 mol / L, and then Na 2 The S solution was added to the suspension A prepared in step (3) at a dropping rate of 0.5 ml / min, and st...

Embodiment 3

[0045] (1) Weigh a certain amount of urea, grind it in an agate mortar and transfer it to a corundum crucible;

[0046] (2) Cover the corundum crucible in step (1) and place it in a muffle furnace for calcination. The heating rate is 3℃ / min, the holding temperature is 580℃, and the holding time is 3h. After cooling to room temperature, take it out and collect the product g-C 3 N 4 ;

[0047] (3) Weigh a certain amount of SnCl 2 ·2H 2 O is dissolved in deionized water, and uniform SnCl is obtained after thorough stirring 2 Solution, Sn in the resulting solution 2+ The concentration is 0.2mol / L, in SnCl 2 Add a certain amount of g-C prepared in step (2) to the solution 3 N 4 Nanopowder, stir and mix well; mark it as suspension A;

[0048] (4) Weigh a certain amount of sodium sulfide and dissolve it in the solvent water, so that the S 2- The concentration is 0.2 mol / L, and then Na 2 The S solution was added to the suspension A prepared in step (3) at a dropping rate of 0.5 ml / min, and st...

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Abstract

The present invention relates to a kind of graphitic carbon nitride / tin sulfide (g-C 3 N 4 / SnS) nano-heterojunction synthesis method, comprising the following steps: 1) taking a certain amount of urea and putting it into a corundum crucible; 2) putting the corundum crucible filled with urea into a muffle furnace for calcination at a certain temperature, Get g‑C 3 N 4 ; 3) Weigh a certain amount of SnCl 2 2H 2 Dissolve O in deionized water, stir well and add a certain amount of g‑C 3 N 4 , continue to stir; 4) Weigh a certain amount of Na 2 S·9H 2 O dissolved in deionized water and added dropwise to g‑C 3 N 4 and SnCl 2 5) obtain the final product after separation, washing and drying. The synthesis technique of the present invention is simple, and g-C 3 N 4 In situ growth of SnS nanoparticles on nanosheets, the g‑C 3 N 4 / SnS nano-heterojunction has the characteristics of mesoporous structure and large specific surface area (80‑90m 2 / g), has excellent photocatalytic performance under visible light conditions.

Description

Technical field [0001] The invention relates to a chemical synthesis method of oxide semiconductor nano powder, in particular to a graphite-like carbon nitride / stannous sulfide (g-C 3 N 4 / SnS) Synthesis method and product of nano heterojunction. Background technique [0002] Graphite phase carbon nitride (g-C 3 N 4 ) Is an organic polymer nano-semiconductor that does not contain metal components and has a sheet-like structure similar to graphene. With excellent chemical stability, semiconductor performance, thermal stability, high specific surface area, and suitable energy level structure, it has a wide range of applications in the fields of photolysis of water to produce hydrogen, catalysis of organic reactions, and photocatalytic degradation of organics, causing many The attention of scientific researchers. However, the pure phase g-C 3 N 4 The band gap is wide, the visible light utilization efficiency is low, and the photo-generated electron-hole pair recombination rate is f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J27/04
CPCB01J27/04B01J27/24B01J35/39
Inventor 贾铁昆余东升付芳李婷婷李继利曹建亮徐倩楠王孝辉
Owner LUOYANG INST OF SCI & TECH
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