WO2012083533A1 - 氟化石墨烯及其制备方法 - Google Patents
氟化石墨烯及其制备方法 Download PDFInfo
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- WO2012083533A1 WO2012083533A1 PCT/CN2010/080123 CN2010080123W WO2012083533A1 WO 2012083533 A1 WO2012083533 A1 WO 2012083533A1 CN 2010080123 W CN2010080123 W CN 2010080123W WO 2012083533 A1 WO2012083533 A1 WO 2012083533A1
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- C—CHEMISTRY; METALLURGY
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/20—Graphite
- C01B32/21—After-treatment
- C01B32/23—Oxidation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
- C01B32/19—Preparation by exfoliation
- C01B32/192—Preparation by exfoliation starting from graphitic oxides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/194—After-treatment
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/198—Graphene oxide
Definitions
- the invention belongs to the technical field of organic semiconductor materials, and particularly relates to fluorinated graphene and a preparation method thereof.
- High specific surface area (theoretical calculated value: 2,630 m 2 /g).
- its high conductivity properties, large specific surface properties and its two-dimensional nanoscale structural properties of monolayers can be used as electrode materials in supercapacitors and lithium ion batteries.
- fluorinated graphite As an active substance of high-energy lithium-ion batteries, fluorinated graphite has attracted great interest and attention from researchers of new chemical power sources, and has successfully developed corresponding high-energy batteries.
- the fluorinated graphite-lithium battery has the following excellent properties: (1) high voltage and high energy density. Generally, the actual nominal voltage of a manganese battery is 3V, and the energy density is 360wh/kg, and the nominal voltage of the cylindrical fluorinated graphite-lithium battery is twice that of the manganese battery, and the energy density is 5 ⁇ 10 of the manganese battery. Times. (2) High utilization rate and stable voltage. According to the discharge reaction, the utilization rate is almost 100% due to the formation of conductive carbon. The internal resistance does not increase during discharge, and the discharge voltage is stabilized to the end of discharge. Long storage period and wide temperature range.
- Graphene fluoride is a compound with high mechanical strength and stable chemical and thermal properties.
- the performance of this new material is very similar to that of polytetrafluoroethylene, commonly referred to as two-dimensional polytetrafluoroethylene.
- the mass percentage of F is 4.7% ⁇ F% ⁇ 38.6%
- the mass percentage of C is 61.4% ⁇ C% ⁇ 95.3%.
- a method for preparing fluorinated graphene comprises the following steps:
- the graphene oxide and the fluorine-containing compound are mixed at a mass ratio of 1:1 to 1:100, and then reacted at 200 to 1000 ° C for 1 to 10 hours, followed by cooling to obtain the fluorinated graphene.
- the fluorine-containing compound is at least one of ammonium fluoride, sodium fluoroborate, potassium fluoroborate, potassium fluoroaluminate, and sodium fluorosilicate.
- the fluorine-containing compound is at least one of polytetrafluoroethylene, polyhexafluoropropylene, and polyvinylidene fluoride.
- the graphene oxide and the fluorine-containing compound have a mass ratio of 1: 1 to 1: 50.
- the graphene oxide is reacted with a fluorine-containing compound at 500 to 800 ° C to obtain the fluorinated graphene.
- the method for preparing the fluorinated graphene further comprises a purification operation of obtaining the fluorinated graphene, followed by washing and drying with water and ethanol.
- the step of preparing graphene oxide using the graphite comprises:
- the graphite, potassium persulfate and phosphorus pentoxide are added to concentrated sulfuric acid at 75-95 ° C according to a mass ratio of 2:1:1, stirred uniformly, then naturally cooled, washed to neutrality and dried to obtain a pretreated mixture. ;
- the solid was washed with dilute hydrochloric acid and dried to obtain the graphene oxide.
- the graphite has a purity greater than 99.5%.
- the above method for preparing fluorinated graphene uses graphite to prepare graphene oxide, and then uses graphene oxide to react with a fluorine-containing compound at a certain temperature, and the process is simple, and fluorinated graphene can be conveniently prepared.
- FIG. 1 is a flow chart showing a method of preparing fluorinated graphene according to an embodiment
- Figure 3 is an XPS spectrum of F1s of a prepared fluorinated graphene
- Figure 4 is a SEM electron micrograph of a prepared fluorinated graphene.
- the mass percentage of F is 4.7% ⁇ F% ⁇ 38.6%, C The mass percentage is 61.4% ⁇ C% ⁇ 95.3%.
- This fluorinated graphene is obtained by replacing an oxygen atom in graphene oxide with a fluorine atom.
- the above-mentioned fluorinated graphene contains a trace amount of H, and since it is low in content, it can be ignored.
- a method for preparing the above fluorinated graphene as shown in FIG. 1 includes the following steps:
- the method comprises the steps of: preparing graphite, potassium permanganate and high-concentration strong oxidizing acid (sulfuric acid or nitric acid) in a water bath or an oil bath in the same container, and taking it out after being fully oxidized, first reducing potassium permanganate with hydrogen peroxide.
- the product was washed several times with distilled water or hydrochloric acid, and dried to obtain graphite oxide.
- the pretreated mixture and potassium permanganate are added to concentrated sulfuric acid to maintain the temperature below 20 °C, after which 30 ⁇ 40°C oil bath 1.5 ⁇ 2.5h, add deionized water, add hydrogen peroxide reaction after 15min, filter and collect solid.
- the purpose of the oil bath is to better control the reaction temperature, and in other embodiments, a water bath can also be used.
- the obtained graphene oxide reacts with a fluorine-containing compound to prepare a graphene fluoride.
- This method is called a solid phase method, and is classified into a fluorine-containing inorganic substance and a fluorine-containing polymer according to a fluorine-containing compound, and the solid phase method includes an inorganic solid phase.
- the method and the organic solid phase method are described in detail below.
- the method uses a thermally decomposable fluorine-containing inorganic substance and S20
- the reaction of the graphene oxide obtained in the step, the fluorine-containing inorganic material used may generally be, for example, ammonium fluoride, sodium fluoroborate, potassium fluoroborate, potassium fluoroaluminate and sodium fluorosilicate. In actual operation, you can choose one of them, or you can choose multiple blends.
- the fluorine-containing inorganic material is dried, and the drying temperature is lower than the decomposition temperature.
- the mass ratio of graphene oxide to fluorine-containing inorganic material is 1:1 to 1:50, and graphene oxide is reacted with fluorine-containing inorganic material at 500 to 800 °C.
- the specific temperature of the heat treatment depends on the actually selected fluorine-containing inorganic material.
- the method uses a thermally decomposable fluoropolymer with S20
- the oxidized graphene obtained in the step is preferably reacted with, for example, polytetrafluoroethylene, polyhexafluoropropylene, and polyvinylidene fluoride. In actual operation, you can choose one of them, or you can choose multiple blends.
- the fluoropolymer is boiled in boiling water for more than 3 hours and then dried.
- the graphene oxide and the fluoropolymer are mixed in an organic solvent, dried, and then subjected to heat treatment at 200 to 800 ° C for 1 to 10 h under an anaerobic condition, and sufficiently cooled and cooled to obtain fluorinated graphene.
- the mass ratio of graphene oxide to fluorine-containing inorganic material is 1: 1 to 1: 50, and graphene oxide and fluoropolymer are in The reaction is carried out at 500 to 800 °C.
- anaerobic conditions can be achieved by inert gas or nitrogen protection.
- the above method for preparing fluorinated graphene uses graphite to prepare graphene oxide, and then uses graphene oxide to react with a fluorine-containing compound at a certain temperature, and the process is simple, and fluorinated graphene can be conveniently prepared.
- the prepared fluorinated graphene can be applied as an electrode material of a supercapacitor or a lithium ion secondary battery.
- Graphene oxide was prepared by a modified Hummers method. The specific step is to put 20g 50 The graphite powder, 10 g of potassium persulfate and 10 g of phosphorus pentoxide were added to concentrated sulfuric acid at 75 ° C, stirred uniformly, cooled for more than 6 h, washed until neutral, and dried. Add the dried sample to 0 °C, In 230 mL of concentrated sulfuric acid, add 60 g of potassium permanganate, keep the temperature of the mixture below 20 °C, then keep it in the oil bath at 40 °C for 1.5 h, then slowly add 920 mL. Deionized water.
- the mixture was uniformly weighed and charged into a reactor and reacted at 500 ° C for 5 h. After slightly cooling, the reactant was taken out, washed successively with water and ethanol, and dried under vacuum at 80 ° C for 24 hours to obtain fluorinated graphene.
- XPS test conditions Samples were analyzed using a VG Scientific ESCALab 220i-XL photoelectron spectrometer.
- the excitation source is Al K ⁇ X-ray with a power of about 300 W.
- the base vacuum for the analysis was 3 x 10 -9 mbar.
- the electron binding energy was corrected by the C1s peak of contaminated carbon (284.8 eV).
- the XPS spectrum of F1s of fluorinated graphene prepared in this example as shown in Fig. 4 can be seen from the figure, the obtained fluorinated graphene is 689.5 eV has a strong peak, corresponding to the carbon bond structure of fluorinated graphene is C - F (689.5 eV).
- Graphene oxide was prepared by a modified Hummers method. The specific step is to put 20g 50 The graphite powder, 10 g of potassium persulfate and 10 g of phosphorus pentoxide were added to concentrated sulfuric acid at 95 ° C, stirred uniformly, cooled for more than 6 h, washed until neutral, and dried. Add the dried sample to 0 °C, In 230 mL of concentrated sulfuric acid, add 60 g of potassium permanganate, keep the temperature of the mixture below 20 °C, then keep it in the oil bath at 30 °C for 2.5 h, then slowly add 920 mL. Deionized water.
- Graphene oxide was prepared by a modified Hummers method. The specific step is to put 20g 50 The graphite powder, 10g potassium persulfate and 10g phosphorus pentoxide were added to concentrated sulfuric acid at 80 °C, stirred evenly, cooled for more than 6h, washed to neutral and dried. Add the dried sample to 0 °C, In 230 mL of concentrated sulfuric acid, add 60 g of potassium permanganate, keep the temperature of the mixture below 20 °C, then keep it in the oil bath at 35 °C for 2 h, then slowly add 920 mL. Deionized water.
- Graphene oxide was prepared by a modified Hummers method. The specific step is to put 20g 50 The graphite powder, 10 g of potassium persulfate and 10 g of phosphorus pentoxide were added to concentrated sulfuric acid at 95 ° C, stirred uniformly, cooled for more than 6 h, washed until neutral, and dried. Add the dried sample to 0 °C, In 230 mL of concentrated sulfuric acid, add 60 g of potassium permanganate, keep the temperature of the mixture below 20 °C, then keep it in the oil bath at 35 °C for 1.5 h, then slowly add 920 mL. Deionized water.
- Graphene oxide was prepared by a modified Hummers method. The specific step is to put 20g 50 The graphite powder, 10 g of potassium persulfate and 10 g of phosphorus pentoxide were added to concentrated sulfuric acid at 75 ° C, stirred uniformly, cooled for more than 6 h, washed until neutral, and dried. Add the dried sample to 0 °C, In 230 mL of concentrated sulfuric acid, add 60 g of potassium permanganate, keep the temperature of the mixture below 20 °C, then keep it in the oil bath at 40 °C for 2 h, then slowly add 920 mL. Deionized water.
- Graphene oxide was prepared by a modified Hummers method. The specific step is to put 20g 50 The graphite powder, 10g potassium persulfate and 10g phosphorus pentoxide were added to concentrated sulfuric acid at 85 °C, stirred evenly, cooled for more than 6h, washed to neutral and dried. Add the dried sample to 0 °C, In 230 mL of concentrated sulfuric acid, add 60 g of potassium permanganate, keep the temperature of the mixture below 20 °C, then keep it in the oil bath at 35 °C for 1.5 h, then slowly add 920 mL. Deionized water.
- Graphene oxide was prepared by a modified Hummers method. The specific step is to put 20g 50 The graphite powder, 10g potassium persulfate and 10g phosphorus pentoxide were added to concentrated sulfuric acid at 85 °C, stirred evenly, cooled for more than 6h, washed to neutral and dried. Add the dried sample to 0 °C, In 230 mL of concentrated sulfuric acid, add 60 g of potassium permanganate, keep the temperature of the mixture below 20 °C, then keep it in the oil bath at 35 °C for 2.5 h, then slowly add 920 mL. Deionized water.
- Graphene oxide was prepared by a modified Hummers method. The specific step is to put 20g 50 The graphite powder, 10g potassium persulfate and 10g phosphorus pentoxide were added to concentrated sulfuric acid at 80 °C, stirred evenly, cooled for more than 6h, washed to neutral and dried. Add the dried sample to 0 °C, In 230 mL of concentrated sulfuric acid, add 60 g of potassium permanganate, keep the temperature of the mixture below 20 °C, then keep it in the oil bath at 35 °C for 1.5 h, then slowly add 920 mL. Deionized water.
- Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 F content 53.5% 38.6% 28.4% 35.2% 17% 0.5% 18.5% 4.7%
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Description
编号 | 实施例 1 | 实施例 2 | 实施例 3 | 实施例 4 | 实施例 5 | 实施例 6 | 实施例 7 | 实施例 8 |
F 含量 | 53.5% | 38.6% | 28.4% | 35.2% | 17% | 0.5% | 18.5% | 4.7% |
Claims (10)
- 一种氟化石墨烯,其特征在于,其中,F的质量百分比为0.5 < F% < 53.5%,C的质量百分比为46.5% < C% < 99.5%。
- 如权利要求1所述氟化石墨稀,其特征在于,所述F的质量百分比为4.7% < F% < 38.6%,所述C所占的质量百分比为61.4% < C% < 95.3%。
- 一种制备权利要求 1 所述氟化石墨烯的方法,其特征在于,包括如下步骤:提供石墨;使用所述石墨制备氧化石墨烯;在无氧环境中,所述氧化石墨烯与含氟化合物按质量比1:1~1:100混合后,200~1000℃下反应1~10 h后冷却,得到所述氟化石墨烯。
- 如权利要求3所述的氟化石墨烯的制备方法,其特征在于,所述含氟化合物为氟化铵、氟硼酸钠、氟硼酸钾、氟铝酸钾和氟硅酸钠中的至少一种。
- 如权利要求3所述的氟化石墨烯的制备方法,其特征在于,所述含氟化合物为聚四氟乙烯、聚六氟丙烯和聚偏氟乙烯中的至少一种。
- 如权利要求3~5中任一项所述氟化石墨烯的制备方法,其特征在于,所述氧化石墨烯与所述含氟化合物的质量比为1:1~1:50。
- 如权利要求3~5中任一项所述氟化石墨烯的制备方法,其特征在于,所述氧化石墨烯与所述含氟化合物在500~800℃下反应制得所述氟化石墨烯。
- 如权利要求3所述的氟化石墨烯的制备方法,其特征在于,所述氟化石墨烯的制备方法还包括得到所述氟化石墨烯后依次用水和乙醇洗涤、干燥的纯化操作。
- 如权利要求 3 所述的氟化石墨烯的制备方法,其特征在于,使用所述石墨制备氧化石墨烯的步骤包括:将所述石墨、过硫酸钾和五氧化二磷按照质量比 2 : 1 : 1 加入到 75~95℃的浓硫酸中,搅拌均匀后自然冷却,洗涤至中性后干燥,得到预处理的混合物;将所述预处理的混合物和高锰酸钾加入到温度低于 20 ℃ 的浓硫酸中,然后在 30~40℃下油浴1.5~2.5 h ,加入去离子水, 15min 后加入双氧水反应,抽滤、收集固体;所述固体用稀盐酸洗涤,干燥,得到所述氧化石墨烯。
- 如权利要求3所述的氟化石墨烯的制备方法,其特征在于,所述石墨纯度大于99.5%。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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EP10860923.1A EP2657188A4 (en) | 2010-12-22 | 2010-12-22 | FLUOROGRAPHIC AND METHOD FOR PREPARING THE SAME |
CN201080069693.XA CN103153848B (zh) | 2010-12-22 | 2010-12-22 | 氟化石墨烯及其制备方法 |
US13/988,289 US8981167B2 (en) | 2010-12-22 | 2010-12-22 | Fluorographene and preparation method thereof |
JP2013541174A JP5753274B2 (ja) | 2010-12-22 | 2010-12-22 | フッ化グラフェンの調製方法 |
PCT/CN2010/080123 WO2012083533A1 (zh) | 2010-12-22 | 2010-12-22 | 氟化石墨烯及其制备方法 |
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US (1) | US8981167B2 (zh) |
EP (1) | EP2657188A4 (zh) |
JP (1) | JP5753274B2 (zh) |
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WO (1) | WO2012083533A1 (zh) |
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WO2014097032A1 (en) * | 2012-12-20 | 2014-06-26 | Basf Se | Edge halogenation of graphene materials |
CN104211048A (zh) * | 2013-06-05 | 2014-12-17 | 中国科学院上海有机化学研究所 | 一种氟化石墨烯的制备方法 |
CN104952712A (zh) * | 2014-03-26 | 2015-09-30 | 韩国科学技术院 | NH4F制造n掺杂石墨烯和电气器件的方法及该石墨烯和器件 |
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CN114247442A (zh) * | 2021-12-24 | 2022-03-29 | 安徽工业大学 | 一种氟掺杂石墨烯负载CuO复合材料及其制备方法和应用 |
CN115849357A (zh) * | 2022-12-09 | 2023-03-28 | 陕西科技大学 | 一种氟化石墨烯及制备方法和应用 |
CN117398530B (zh) * | 2023-11-15 | 2024-03-26 | 上海科进医疗科技有限公司 | 一种石墨烯医用水溶性润滑剂及其制备方法 |
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2010
- 2010-12-22 EP EP10860923.1A patent/EP2657188A4/en not_active Withdrawn
- 2010-12-22 US US13/988,289 patent/US8981167B2/en active Active
- 2010-12-22 JP JP2013541174A patent/JP5753274B2/ja active Active
- 2010-12-22 CN CN201080069693.XA patent/CN103153848B/zh active Active
- 2010-12-22 WO PCT/CN2010/080123 patent/WO2012083533A1/zh active Application Filing
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Cited By (5)
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CN104952712A (zh) * | 2014-03-26 | 2015-09-30 | 韩国科学技术院 | NH4F制造n掺杂石墨烯和电气器件的方法及该石墨烯和器件 |
CN104952712B (zh) * | 2014-03-26 | 2018-01-12 | 朗姆研究公司 | NH4F制造n掺杂石墨烯和电气器件的方法及该石墨烯和器件 |
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CN103153848B (zh) | 2015-06-17 |
US20130261352A1 (en) | 2013-10-03 |
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