CN104292236A - Preparation method of three-dimensional porous g-C3N4 material - Google Patents
Preparation method of three-dimensional porous g-C3N4 material Download PDFInfo
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- CN104292236A CN104292236A CN201410468720.0A CN201410468720A CN104292236A CN 104292236 A CN104292236 A CN 104292236A CN 201410468720 A CN201410468720 A CN 201410468720A CN 104292236 A CN104292236 A CN 104292236A
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- aqueous solution
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- melamine
- dimensional porous
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- 239000000463 material Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000007864 aqueous solution Substances 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000000227 grinding Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 239000012153 distilled water Substances 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 238000005245 sintering Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 229910052593 corundum Inorganic materials 0.000 claims abstract 3
- 239000010431 corundum Substances 0.000 claims abstract 3
- 239000000725 suspension Substances 0.000 claims abstract 2
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 claims description 12
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000000498 ball milling Methods 0.000 claims description 9
- 239000006185 dispersion Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical group [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 238000013019 agitation Methods 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims 1
- 238000001556 precipitation Methods 0.000 claims 1
- 239000000376 reactant Substances 0.000 claims 1
- 238000006116 polymerization reaction Methods 0.000 abstract description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 5
- 230000005588 protonation Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000004065 semiconductor Substances 0.000 abstract description 2
- 229920000877 Melamine resin Polymers 0.000 abstract 4
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 abstract 4
- 239000002244 precipitate Substances 0.000 abstract 2
- LTURHSAEWJPFAA-UHFFFAOYSA-N sulfuric acid;1,3,5-triazine-2,4,6-triamine Chemical compound OS(O)(=O)=O.NC1=NC(N)=NC(N)=N1 LTURHSAEWJPFAA-UHFFFAOYSA-N 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000001699 photocatalysis Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/0605—Binary compounds of nitrogen with carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B01J35/61—
Abstract
The invention relates to the field of semiconductor materials and aims at providing a preparation method of a three-dimensional porous g-C3N4 material. The preparation method of the three-dimensional porous g-C3N4 material comprises the following three steps: A, dropwise adding an H2SO4 aqueous solution into a melamine aqueous solution at the temperature of 80 DEG C to form white suspension liquid; continuously stirring for 2 hours to obtain precipitate; filtering the precipitate, washing with distilled water and absolute ethyl alcohol, and drying for 24 hours to obtain melamine sulphate; B, putting the melamine sulphate into a corundum boat, then putting the corundum boat in a tubular furnace for sintering, and after the tubular furnace is cooled to room temperature, grinding the obtained yellow polymerization product to obtain powdery particles, namely g-C3N4 particles are obtained; and C, carrying out a g-C3N4 hydrothermal protonation technology. The preparation method of the three-dimensional porous g-C3N4 material has the beneficial effects that polymerization temperature of g-C3N4 is effectively reduced, polymerization energy of melamine is reduced through protonation on the melamine, and the melamine can be polymerized at relatively low temperature to generate graphite-like g-C3N4.
Description
Technical field
The invention relates to field of semiconductor materials, particularly the three-dimensional porous g-C of one
3n
4the preparation method of material.
Background technology
Class graphitic carbon nitride (g-C
3n
4) because of its special physical and chemical performance, show good application prospect in the field such as Solar use, environment protection, cause extensive concern.But, adopt g-C prepared by traditional method
3n
4mostly be closely knit block particle, specific surface area is lower, photocatalytic activity is poor, limits its widespread use.At present, the main polymerization process in early stage adopting hard template and soft template method to control the presoma such as trimeric cyanamide or urea, to obtain the g-C of porous large specific surface
3n
4material; Or adopt physico-chemical process to block g-C
3n
4carry out post-processed, to obtain the nano structural material such as nanotube, nanometer sheet.But hard template needs with HF or NH in end processing sequences
4hF
2the solution stronger etc. toxicity dissolves, and soft template is everlasting again g-C
3n
4introduce excessive carbon atom in matrix, form extra exciton complex loci, reduce photocatalytic activity.And by the nano structural material that post-processed obtains, productive rate is extremely low, and still there is the problem being difficult to reclaim in actual applications.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes deficiency of the prior art, provides a kind of three-dimensional porous g-C
3n
4the preparation method of material.
For solving the problems of the technologies described above, solution of the present invention is:
A kind of three-dimensional porous g-C is provided
3n
4the preparation method of material, comprises the steps:
Steps A: under agitation, by H
2sO
4the aqueous solution dropwise adds in the trimeric cyanamide aqueous solution of 80 DEG C and forms white suspension; Precipitation is obtained after continuing to stir 2h; By this sedimentation and filtration, and wash three times respectively with distilled water and dehydrated alcohol, after 60 DEG C of drying treatment 24h, obtain trimeric cyanamide vitriol;
Wherein, described H
2sO
4the volumetric molar concentration of the aqueous solution is 0.02mol/L ~ 2mol/L, and the volumetric molar concentration of the trimeric cyanamide aqueous solution is 0.02mol/L ~ 2mol/L, and the amount controlling reactant makes H
2sO
4be 5: 1 ~ 0.5: 1 with trimeric cyanamide mol ratio;
Step B: trimeric cyanamide vitriol is put into corundum boat, is placed in tube furnace subsequently and sinters, to be cooled to room temperature, and the yellow polymerisate obtained is ground to powdered granule, obtains g-C
3n
4particle;
Wherein, the protective atmosphere sintered in tube furnace is rare gas element, and sin-tering mechanism, for be first rapidly heated to 380 DEG C, to be slowly warming up to 450 DEG C ~ 550 DEG C and to be incubated 2h ~ 6h afterwards, wherein the section of being rapidly heated temperature rise rate is 10 DEG C/min, and slow intensification section temperature rise rate is 2 DEG C/min;
Step C:g-C
3n
4the protonated technique of hydro-thermal:
By the g-C obtained in step B
3n
4dispersion system is obtained, after supersound process 1h, dropwise to add H under the rotating speed of 50r/min in this dispersion system in Granular composite to dehydrated alcohol
2sO
4the aqueous solution, stirring in water bath process in confined conditions after Keep agitation 18h, is transferred to hydrothermal reaction kettle subsequently and carries out hydro-thermal reaction, gained sedimentation and filtration after hydro-thermal reaction, and wash three times respectively with distilled water and dehydrated alcohol, finally with 60 DEG C of drying and processings, be 1 g-C
3n
4the protonated technological operation of hydro-thermal; Complete above-mentioned g-C
3n
4the protonated technological operation of hydro-thermal 1 ~ 3 time, obtains three-dimensional porous g-C
3n
4material;
Wherein, g-C
3n
4the solid content of particle in dispersion system is 0.5%-2%, H
2sO
4the volumetric molar concentration of the aqueous solution is 0.05mol/L ~ 0.2mol/L, control H
2sO
4with g-C
3n
4mol ratio 4: 1 ~ 1: 1; Bath temperature is 70 DEG C ~ 90 DEG C, and water-curing treatment duration is 2h ~ 6h; Hydrothermal temperature is 120 DEG C ~ 180 DEG C, and the hydro-thermal reaction time is 12h ~ 36h.
In the present invention, in described step B, the grinding technics of yellow polymerisate is ball-milling technology, and these processing condition are: ratio of grinding media to material 30: 1, ball milling speed 200r/min, Ball-milling Time 4h.
In the present invention, the rare gas element in described step B is argon gas.
Principle of work of the present invention: the present invention by protonated to trimeric cyanamide of sulfuric acid, reduce trimeric cyanamide polymerization can, make trimeric cyanamide can polymerization reaction take place at lower temperatures, and successfully prepare loose g-C
3n
4block particle; Then under hydrothermal conditions, utilize sulfuric acid to g-C
3n
4carry out protonated process, proton can utilize loose g-C
3n
4the specific channel existed in particle, and a large amount of basic group generation protonation, prepare required three-dimensional porous g-C
3n
4.
Compared with prior art, the invention has the beneficial effects as follows:
1, g-C is effectively reduced
3n
4polymerization temperature, by the protonation to trimeric cyanamide, reduces the polymerization energy of trimeric cyanamide, trimeric cyanamide can be polymerized at a lower temperature and generate graphite-like g-C
3n
4, and solve pure phase g-C
3n
4sintering sample is fine and close, surfactivity point is few, be difficult to the problems such as grinding;
2, solve the problem that catalytic material high-ratio surface sum recoverable is difficult to take into account, by protonation under hydrothermal conditions, obtain the three-dimensional porous g-C with large specific surface sum apparent size simultaneously
3n
4material, is conducive to realizing recycling it while guarantee material high catalytic activity.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail:
Three-dimensional porous g-C
3n
4the preparation method of material, comprises the following steps:
Steps A: under agitation, by H
2sO
4the aqueous solution dropwise adds in 80 DEG C of trimeric cyanamide aqueous solution and forms white suspension; Precipitation is obtained after continuing to stir 2h; By this sedimentation and filtration, and wash three times respectively with distilled water and dehydrated alcohol, after 60 DEG C of drying treatment 24h, obtain trimeric cyanamide vitriol;
Wherein, described H
2sO
4the volumetric molar concentration of the aqueous solution is 0.02mol/L ~ 2mol/L, and the volumetric molar concentration of the trimeric cyanamide aqueous solution is 0.02mol/L ~ 2mol/L, and the amount controlling reactant makes H
2sO
4be 5: 1 ~ 0.5: 1 with the mol ratio of trimeric cyanamide.
Step B: trimeric cyanamide vitriol is put into corundum boat, is placed in tube furnace subsequently and sinters, and after being cooled to room temperature, the yellow polymerisate obtained is ground to powdered granule, obtains g-C
3n
4particle;
Wherein, the protective atmosphere sintered in tube furnace is the rare gas elementes such as argon gas, and sin-tering mechanism, for be first rapidly heated to 380 DEG C, to be slowly warming up to 450 DEG C ~ 550 DEG C and to be incubated 2h ~ 6h afterwards, wherein the section of being rapidly heated temperature rise rate is 10 DEG C/min, and slow intensification section temperature rise rate is 2 DEG C/min; The grinding technics of described yellow polymerisate is ball-milling technology, and these processing condition are: ratio of grinding media to material 30: 1, ball milling speed 200r/min, Ball-milling Time 4h.
Step C:g-C
3n
4the protonated technique of hydro-thermal:
By the g-C obtained in step B
3n
4dispersion system is obtained, after supersound process 1h, dropwise to add H under the rotating speed of 50r/min in this dispersion system in Granular composite to dehydrated alcohol
2sO
4the aqueous solution, stirring in water bath process in confined conditions after Keep agitation 18h, is transferred to hydrothermal reaction kettle subsequently and carries out hydro-thermal reaction, gained sedimentation and filtration after hydro-thermal reaction, and wash three times respectively with distilled water and dehydrated alcohol, finally with 60 DEG C of drying and processings, be 1 g-C
3n
4the protonated technological operation of hydro-thermal; Complete above-mentioned g-C
3n
4the protonated technological operation of hydro-thermal 1 ~ 3 time, obtains three-dimensional porous g-C
3n
4material;
Wherein, g-C
3n
4the solid content of particle in dispersion system is 0.5%-2%, H
2sO
4the volumetric molar concentration of the aqueous solution is 0.05mol/L ~ 0.2mol/L, control H
2sO
4with g-C
3n
4mol ratio 4: 1 ~ 1: 1; Bath temperature is 70 DEG C ~ 90 DEG C, and water-curing treatment duration is 2h ~ 6h; Hydrothermal temperature is 120 DEG C ~ 180 DEG C, and the hydro-thermal reaction time is 12h ~ 36h.
The following examples can make professional and technical personnel's comprehend the present invention of this specialty, but do not limit the present invention in any way.Three-dimensional porous g-C is successfully obtained respectively by 8 embodiments
3n
4the preparation method of material, the testing data in each embodiment sees the following form 1.
Table 1 embodiment data sheet
Finally, it is also to be noted that enumerate above be only specific embodiments of the invention son.Obviously, the invention is not restricted to above examples of implementation, many distortion can also be had.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, all should think protection scope of the present invention.
Claims (3)
1. three-dimensional porous g-C
3n
4the preparation method of material, is characterized in that, comprises the steps:
Steps A: under agitation, by H
2sO
4the aqueous solution dropwise adds in the trimeric cyanamide aqueous solution of 80 DEG C and forms white suspension; Precipitation is obtained after continuing to stir 2h; By this sedimentation and filtration, and wash three times respectively with distilled water and dehydrated alcohol, after 60 DEG C of drying treatment 24h, obtain trimeric cyanamide vitriol;
Wherein, described H
2sO
4the volumetric molar concentration of the aqueous solution is 0.02mol/L ~ 2mol/L, and the volumetric molar concentration of the trimeric cyanamide aqueous solution is 0.02mol/L ~ 2mol/L, and the amount controlling reactant makes H
2sO
4be 5: 1 ~ 0.5: 1 with the mol ratio of trimeric cyanamide;
Step B: trimeric cyanamide vitriol is put into corundum boat, is placed in tube furnace subsequently and sinters, to be cooled to room temperature, and the yellow polymerisate obtained is ground to powdered granule, obtains g-C
3n
4particle;
Wherein, the protective atmosphere sintered in tube furnace is rare gas element, and sin-tering mechanism, for be first rapidly heated to 380 DEG C, to be slowly warming up to 450 DEG C ~ 550 DEG C and to be incubated 2h ~ 6h afterwards, wherein the section of being rapidly heated temperature rise rate is 10 DEG C/min, and slow intensification section temperature rise rate is 2 DEG C/min;
Step C:g-C
3n
4the protonated technique of hydro-thermal:
By the g-C obtained in step B
3n
4dispersion system is obtained, after supersound process 1h, dropwise to add H under the rotating speed of 50r/min in this dispersion system in Granular composite to dehydrated alcohol
2sO
4the aqueous solution, stirring in water bath process in confined conditions after Keep agitation 18h, is transferred to hydrothermal reaction kettle subsequently and carries out hydro-thermal reaction, gained sedimentation and filtration after hydro-thermal reaction, and wash three times respectively with distilled water and dehydrated alcohol, finally with 60 DEG C of drying and processings, be 1 g-C
3n
4the protonated technological operation of hydro-thermal; Complete above-mentioned g-C
3n
4the protonated technological operation of hydro-thermal 1 ~ 3 time, obtains three-dimensional porous g-C
3n
4material;
Wherein, g-C
3n
4the solid content of particle in dispersion system is 0.5%-2%, H
2sO
4the volumetric molar concentration of the aqueous solution is 0.05mol/L ~ 0.2mol/L, control H
2sO
4with g-C
3n
4mol ratio 4: 1 ~ 1: 1; Bath temperature is 70 DEG C ~ 90 DEG C, and water-curing treatment duration is 2h ~ 6h; Hydrothermal temperature is 120 DEG C ~ 180 DEG C, and the hydro-thermal reaction time is 12h ~ 36h.
2. according to the preparation method described in claim 1, it is characterized in that, in described step B, the grinding technics of yellow polymerisate is ball-milling technology, and these processing condition are: ratio of grinding media to material 30: 1, ball milling speed 200r/min, Ball-milling Time 4h.
3. according to the preparation method described in claim 1, it is characterized in that, the rare gas element in described step B is argon gas.
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|---|---|---|---|
| CN201410468720.0A CN104292236A (en) | 2014-09-15 | 2014-09-15 | Preparation method of three-dimensional porous g-C3N4 material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410468720.0A CN104292236A (en) | 2014-09-15 | 2014-09-15 | Preparation method of three-dimensional porous g-C3N4 material |
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| Publication Number | Publication Date |
|---|---|
| CN104292236A true CN104292236A (en) | 2015-01-21 |
Family
ID=52312221
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|---|---|---|---|
| CN201410468720.0A Pending CN104292236A (en) | 2014-09-15 | 2014-09-15 | Preparation method of three-dimensional porous g-C3N4 material |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104861784A (en) * | 2015-06-11 | 2015-08-26 | 福州大学 | Nitrogen carbide quantum dot fluorescence ink |
| CN104986742A (en) * | 2015-06-29 | 2015-10-21 | 济南大学 | Bead-chain-like graphitized carbon nitride nano material and preparation method thereof |
| CN105271142A (en) * | 2015-11-19 | 2016-01-27 | 南京工程学院 | Irregularly-rodlike g-C3N4 material and preparation method and application thereof |
| CN105664835A (en) * | 2016-04-01 | 2016-06-15 | 山东农业大学 | Batch preparation method of porous carbon nitride material under assistance of organic carboxylic acid |
| CN106006581A (en) * | 2016-05-20 | 2016-10-12 | 太原理工大学 | Method for solvothermal preparation of fluorescent carbon nitride quantum dots |
| JP2017043511A (en) * | 2015-08-26 | 2017-03-02 | 国立大学法人 鹿児島大学 | Method for producing carbon nitride |
| CN107827091A (en) * | 2017-11-17 | 2018-03-23 | 中南大学 | A kind of protonation is modified class graphitic nitralloy carbon material and its preparation and the application in lithium ion battery negative material |
| CN108579785A (en) * | 2018-04-20 | 2018-09-28 | 武汉工程大学 | Efficient visible light decomposes aquatic products H2Sulfur doping carbonitride preparation method |
| CN112374473A (en) * | 2020-11-11 | 2021-02-19 | 深圳大学 | Phenol organic matter doped g-C synthesized based on phenol-containing wastewater3N4Method (2) |
| CN113956781A (en) * | 2021-09-22 | 2022-01-21 | 杭州梵因科技有限公司 | Preparation method of nano enhanced ultraviolet curing antifogging agent |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104861784A (en) * | 2015-06-11 | 2015-08-26 | 福州大学 | Nitrogen carbide quantum dot fluorescence ink |
| CN104986742A (en) * | 2015-06-29 | 2015-10-21 | 济南大学 | Bead-chain-like graphitized carbon nitride nano material and preparation method thereof |
| JP2017043511A (en) * | 2015-08-26 | 2017-03-02 | 国立大学法人 鹿児島大学 | Method for producing carbon nitride |
| CN105271142A (en) * | 2015-11-19 | 2016-01-27 | 南京工程学院 | Irregularly-rodlike g-C3N4 material and preparation method and application thereof |
| CN105664835A (en) * | 2016-04-01 | 2016-06-15 | 山东农业大学 | Batch preparation method of porous carbon nitride material under assistance of organic carboxylic acid |
| CN106006581A (en) * | 2016-05-20 | 2016-10-12 | 太原理工大学 | Method for solvothermal preparation of fluorescent carbon nitride quantum dots |
| CN106006581B (en) * | 2016-05-20 | 2018-07-31 | 太原理工大学 | A kind of method of solvent hot preparation fluorescence nitridation carbon quantum dot |
| CN107827091A (en) * | 2017-11-17 | 2018-03-23 | 中南大学 | A kind of protonation is modified class graphitic nitralloy carbon material and its preparation and the application in lithium ion battery negative material |
| CN108579785A (en) * | 2018-04-20 | 2018-09-28 | 武汉工程大学 | Efficient visible light decomposes aquatic products H2Sulfur doping carbonitride preparation method |
| CN108579785B (en) * | 2018-04-20 | 2021-10-12 | 武汉工程大学 | High-efficiency visible light decomposition aquatic product H2Preparation method of sulfur-doped carbon nitride |
| CN112374473A (en) * | 2020-11-11 | 2021-02-19 | 深圳大学 | Phenol organic matter doped g-C synthesized based on phenol-containing wastewater3N4Method (2) |
| CN113956781A (en) * | 2021-09-22 | 2022-01-21 | 杭州梵因科技有限公司 | Preparation method of nano enhanced ultraviolet curing antifogging agent |
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Application publication date: 20150121 |