Abstract: Provided are a surface coupling induced ionization method, and a plasma device. The method includes the following steps: (1) feeding a first electromagnetic wave beam to a material via a free space or waveguide to excite surface plasma waves; where target molecules to be ionized are introduced to a surface of the material, and electrons of the target molecules are coupled with surface plasmons on the material under interaction control to induce the ionization of the target molecules; (2) feeding second and subsequent electromagnetic wave beams to an ionization area of the target molecules on the surface of the material synchronously via the free space or waveguide, such that the ionized target molecules absorb the electromagnetic waves to improve the degree of ionization of the target molecules; and (3) releasing the target molecules in the form of bulk phase plasma to realize surface coupling induced ionization.

Abstract: Provided are an adjustable continuous-flow plasma disinfection and sterilization method and a disinfection and sterilization device. The adjustable continuous-flow plasma disinfection and sterilization method includes: (1) exciting atmospheric-pressure plasmas in a disinfection and sterilization chamber featuring an adjustable inlet-outlet pressure difference; (2) adjusting the inlet-outlet pressure difference of the disinfection and sterilization chamber after the atmospheric-pressure plasmas become stable, so as to adjust the plasma density in the chamber; (3) continuously feeding microorganism carriers to be disinfected and sterilized into the disinfection and sterilization chamber for disinfection or sterilization; and (4) continuously discharging the carriers out of the disinfection and sterilization chamber to complete disinfection or sterilization. The method allows continuous work under atmospheric pressure, and can disinfect or sterilize closed, semi-open or open spaces.

Abstract: The present invention provides a preparation method for graphene quantum dots with different oxygen contents, including the following steps: Step 1: dispersing a graphene oxide in a peroxide solution to obtain a graphene oxide dispersion; Step 2: mixing the graphene oxide dispersion with an alkali liquor, purifying to obtain a graphene quantum dot dry powder; Step 3: loading the graphene quantum dots dry powder on a carrier, performing a gradient elution to obtain a plurality of graphene quantum dots with different oxygen contents. The preparation method for graphene quantum dots can realize the control of oxygen content of the graphene quantum dots. Therefore, the control of the emission wavelength of the product is achieved, which provides a reliable premise for applications of the graphene quantum dots in the fields of LED, cell labeling, etc. In addition, the method provided by the present invention is also simple and easy to operate.

Abstract: A graphene material coating and a preparation method thereof pertain to the technical field of air filtration, and relates to an air filtration device and system based on the graphene material coating. The preparation method of the graphene material coating includes the following steps: S1), preparing a slurry dispersion stock solution: adding a dispersant and a binder to a solvent, and stirring to form the slurry dispersion stock solution; and S2), forming a graphene surface coating: adding a graphene powder to the slurry dispersion stock solution, and after being homogenized by stirring, coating a homogenate on a surface of a carrier, and drying to obtain a finished product of the graphene material coating. This technique can increase the adsorption rate of harmful substances in the gases and avoid secondary pollution caused by unstable adsorption.

Abstract: Disclosed are a graphene material production device and a system including the device. The device includes: a first reaction component, a second reaction component and a negative pressure generating component. The first reaction component includes a first reaction chamber and a first material outlet arranged at a bottom of the first reaction chamber. The second reaction component includes a second reaction chamber and a second material inlet. A connecting passage between the first material outlet and the second material inlet is provided with a valve. A suction hole of the negative pressure generating component is provided inside the second reaction chamber. The use of the device in the process of producing a graphene material by a redox method can overcome the problem that the viscous material is difficult to transfer, thereby reducing the production difficulty and effectively improving the production efficiency of graphene materials.

Abstract: The present invention relates to a preparation method of fluorinated graphene. The method for preparing fluorinated graphene, including the following steps: S1), under the protection of inert gas, the graphene undergoes a fluorination reaction with a first fluorinating agent, the reaction temperature is 150-550° C., the reaction time is 2-20 h, and a fluorinated graphene crude product is obtained. The graphene is graphene powder, or a graphene film; the first fluorinating agent includes fluorine gas; S2), under the protection of inert gas, the fluorinated graphene crude product undergoes a fluorination reaction with a second fluorinating agent, the reaction temperature is 150-400° C., the reaction time is 2-10 h, and a fluorinated graphene is obtained. The second fluorinating agent is gas-phase fluoride. By using the method, fluorinated graphene having a high fluorine content can be prepared, the fluorine content is close to the theoretical level, and the defect density is low.

Abstract: Disclosed are a graphene material production device and a system including the device. The device includes: a first reaction component, a second reaction component and a negative pressure generating component. The first reaction component includes a first reaction chamber and a first material outlet arranged at a bottom of the first reaction chamber. The second reaction component includes a second reaction chamber and a second material inlet. A connecting passage between the first material outlet and the second material inlet is provided with a valve. A suction hole of the negative pressure generating component is provided inside the second reaction chamber. The use of the device in the process of producing a graphene material by a redox method can overcome the problem that the viscous material is difficult to transfer, thereby reducing the production difficulty and effectively improving the production efficiency of graphene materials.

Abstract: A lithium ion battery anode material, a method thereof and a lithium ion battery. The lithium ion battery anode material includes graphite carbon materials and functionalized graphene. The method of the lithium ion battery anode material includes the following steps: compounding a graphite phase carbon material and functionalized graphene by liquid phase compounding method or solid phase compounding method, to obtain a lithium ion battery composite material. The lithium ion battery anode material provided by the present invention has the advantages of high capacity, high initial coulombic efficiency, excellent cycle performance and low production cost.

Abstract: A high temperature reaction device includes a gas controlling unit, a powder controlling unit, a high temperature reaction unit, and a material collecting unit. The gas controlling unit controls a speed of an airflow at an inlet of the high temperature reaction unit. The powder controlling unit controls a speed of powder entering the airflow. The material collecting unit is connected to an outlet of the high temperature reaction unit to perform a gas-solid separation on a reacted material. After the reaction, the powder enters the material connecting unit and the material collection can be realized without the need of shutdown for cooling, thereby realizing a continuous reaction. In addition, the material collecting unit can quickly separate the gas and powder after reaction, thereby avoiding side reactions and further improving the purity of the powder material.

Abstract: A gas filtration device includes a self-supporting graphene layer (1) made of a graphene material. The graphene material includes graphene and/or functionalized graphene. The gas filtration device of the present invention enhances the filtration of pollutants in the atmosphere and effectively avoids secondary pollution.

Abstract: The present invention discloses a graphene oxide purification method and a graphene oxide. The purification method of graphene oxide includes the following steps: ion exchange purification: sequentially passing a graphene oxide solution through a cation exchange resin and an anion exchange resin. The cation exchange resin is a hydrogen cation exchange resin, and the anion exchange resin is a hydroxide anion exchange resin. The purification method provided by the present invention has the advantages of simple operation and high purification efficiency, and the content of each metal impurity after purification is less than 10 ppm. In addition, the used ion exchange resin can also be reused through regeneration, which is energy-saving and environment-friendly.

Abstract: The invention relates to a preparation method of graphene using graphene oxide. The method consists of the following steps. (1). Preparation of graphene oxide-dispersant solution; (2). Reduction of graphene oxide; (3). Obtaining graphene by suction filtration and drying process. Based on the preparation of anthracite, the invention could reduce production costs effectively comparing to traditional preparation methods of graphene, and make the reaction more fast and complete, facilitating the achievement of large scale industrial production.

Abstract: The present invention discloses a graphene oxide purification method and a graphene oxide. The purification method of graphene oxide includes the following steps: ion exchange purification: sequentially passing a graphene oxide solution through a cation exchange resin and an anion exchange resin. The cation exchange resin is a hydrogen cation exchange resin, and the anion exchange resin is a hydroxide anion exchange resin. The purification method provided by the present invention has the advantages of simple operation and high purification efficiency, and the content of each metal impurity after purification is less than 10 ppm. In addition, the used ion exchange resin can also be reused through regeneration, which is energy-saving and environment-friendly.

Abstract: The present invention relates to a preparation method of fluorinated graphene. The method for preparing fluorinated graphene, including the following steps: S1), under the protection of inert gas, the graphene undergoes a fluorination reaction with a first fluorinating agent, the reaction temperature is 150-550° C., the reaction time is 2-20 h, and a fluorinated graphene crude product is obtained. The graphene is graphene powder, or a graphene film; the first fluorinating agent includes fluorine gas; S2), under the protection of inert gas, the fluorinated graphene crude product undergoes a fluorination reaction with a second fluorinating agent, the reaction temperature is 150-400° C., the reaction time is 2-10 h, and a fluorinated graphene is obtained. The second fluorinating agent is gas-phase fluoride. By using the method, fluorinated graphene having a high fluorine content can be prepared, the fluorine content is close to the theoretical level, and the defect density is low.

Abstract: A smoke gas filter device and a tobacco product. The smoke gas filter device is formed with a smoke gas filter channel (L). The smoke gas filter channel (L) is provided with a graphene material segment (1). The graphene material segment (1) is a graphene material powder segment, a graphene material aerogel segment or a graphene material film segment. A graphene material is graphene and/or functionalized graphene. The smoke gas filter device has a large adsorption capacity, and the adsorption is firm, which helps to reduce amount of the toxic substances entering the human body in the smoke gas, reducing the harm to the human body while smoking.

Abstract: A lithium ion battery anode material, a method thereof and a lithium ion battery. The lithium ion battery anode material includes graphite carbon materials and functionalized graphene. The method of the lithium ion battery anode material includes the following steps: compounding a graphite phase carbon material and functionalized graphene by liquid phase compounding method or solid phase compounding method, to obtain a lithium ion battery composite material. The lithium ion battery anode material provided by the present invention has the advantages of high capacity, high initial coulombic efficiency, excellent cycle performance and low production cost.

Abstract: The present invention provides a preparation method for graphene quantum dots with different oxygen contents, including the following steps: Step 1: dispersing a graphene oxide in a peroxide solution to obtain a graphene oxide dispersion; Step 2: mixing the graphene oxide dispersion with an alkali liquor, purifying to obtain a graphene quantum dot dry powder; Step 3: loading the graphene quantum dots dry powder on a carrier, performing a gradient elution to obtain a plurality of graphene quantum dots with different oxygen contents. The preparation method for graphene quantum dots can realize the control of oxygen content of the graphene quantum dots. Therefore, the control of the emission wavelength of the product is achieved, which provides a reliable premise for applications of the graphene quantum dots in the fields of LED, cell labeling, etc. In addition, the method provided by the present invention is also simple and easy to operate.

Abstract: The present invention relates to a preparation method of graphene oxide based on anthracite. The method consists of the following steps. a. Preparation of ultra-clean anthracite powder; b. Pretreatment of ultra-clean anthracite powder; c. Preparation of anthracite oxide dispersion; d. Preparation of graphene oxide colloid solution; e. Preparation of graphene oxide. The invention also relates to a preparation method of graphene using graphene oxide obtained by method mentioned before. The method consists of the following steps. f. Preparation of graphene oxide-dispersant solution; g. Reduction of graphene oxide; h. Obtaining graphene by suction filtration and drying process. Based on the preparation of anthracite, the invention could reduce production costs effectively comparing to traditional preparation methods of graphene and graphene oxide, and make the reaction more fast and complete, facilitating the achievement of large scale industrial production.

Abstract: The invention relates to a preparation method of graphene using graphene oxide. The method consists of the following steps. (1). Preparation of graphene oxide-dispersant solution; (2). Reduction of graphene oxide; (3). Obtaining graphene by suction filtration and drying process. Based on the preparation of anthracite, the invention could reduce production costs effectively comparing to traditional preparation methods of graphene, and make the reaction more fast and complete, facilitating the achievement of large scale industrial production.

Abstract: A solid phase extraction column, preparation method therefor, and pre-processing method of chemical sample based on solid phase extraction column. The solid phase extraction column includes a separation column, and a solid phase extraction agent tilled within the separation column. The solid phase extraction agent is graphene or modified graphene. The solid phase extraction column is prepared by loading the solid phase extraction agent into the separation column, and vibrating to compact the solid phase extraction agent. The solid phase extraction column is used to pre-process a chemical sample to realize a highly effective separation effect. The problem of data distortion caused by being unable for a target component to be detected in a subsequent detection or being unable to detect a real value, is avoided.