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54results about How to "Commonly available raw materials" patented technology

Graphene-based nano iron oxide composite material and preparation method thereof

The invention discloses a graphene-based nano iron oxide composite material and a preparation method thereof. By the method, iron oxide nano granules with uniform diameter and controllable shape and components can be loaded on graphene. The method comprises the following steps of: uniformly dispersing graphite oxide into deionized water by adopting an ultrasonic method to obtain graphene oxide solution; adding an iron salt precursor into the obtained solution and mixing the precursor and the solution uniformly, adjusting the pH of the solution, and hydrolyzing the iron salt; putting the mixed solution into a reaction kettle and performing hydrothermal reaction; and finally, cleaning and freeze-drying the obtained product to obtain the graphene-based nano iron oxide composite material. The raw materials are common and easily obtained, the cost is low, and the preparation process is simple, safe and environmentally-friendly; the prepared graphene-based nano iron oxide composite material has good structural stability and monodispersity; when the composite material is used as a lithium iron battery electrode material, the charge/discharge capacity can reach over 1,000mAh/g; and the composite material has good multiplying power performance and cycle life.
Owner:CHINA UNIV OF MINING & TECH

Controllable crystalline form titanium dioxide and graphite alkene composite material with high efficient photoelectricity activity and preparation method thereof

The invention discloses controllable crystalline form titanium dioxide and a graphite alkene composite material with high efficient photoelectricity activity and a preparation method thereof. The composite material is formed by mixing TiO2 powder and graphite alkene or scattering the TiO2 powder in oxidized graphite alkene dispersing agents to perform hydro-thermal reaction. The mass ratio of TiO2 powder and graphite or graphite alkene is 1:1 to 500:1. The preparation method is simple, low in cost and environmental-friendly. The controllable crystalline form titanium dioxide and a graphite alkene composite material with high efficient photoelectricity activity can control crystalline form of the obtained TiO2 according to the ratio of alcohol and water or amount of titanium sources. When the amount is amplified, the controllable crystalline form titanium dioxide and a graphite alkene composite material with high efficient photoelectricity activity have good performances. After the graphite alkene is composed, photocatalysis is greatly improved. All obtained products are applied to fields of dye sensitization solar cells, catalysts, lithium ion cells, sensing and the like.
Owner:NANJING UNIV OF TECH

Titanium dioxide nanotube/ graphene composite material and preparation method thereof

The invention relates to a titanium dioxide (TiO2) nanotube/ graphene composite material and a preparation method thereof. The method includes utilizing graphite as a raw material, conducting oxidizing and peeling to obtain graphene oxide stably dispersed in solution, conducting suction filtering and drying to obtain graphene oxide powder, stirring TiO2P25 nanometer particles, alkali liquid and alcohol organic solvent in mixing mode, then adding the the graphene oxide powder into the mixture to be dispersed, delivering obtained mixed liquid into a reaction kettle, conducting closed reaction, conduct cooling to the room temperature, conducting separation to obtain white precipitate and conducting washing and burning to obtain the TiO2 nanometer/ graphene composite material. The TiO2 nanometer/ graphene composite material is high in solar energy utilization ratio, free of self particle agglomeration and free of re-accumulation of graphene slice layers. Simultaneously, raw materials are easy to obtain and low in cost. The preparation process is simple and safe. The material has potential application value in the fields of electrode materials, photocatalysis, solar energy splitting water, solar cells, environment and the like.
Owner:无锡润鹏复合新材料有限公司

Preparation method of graphene/titanium dioxide composite photocatalyst

The invention relates to a preparation method of a graphene / titanium dioxide composite photocatalyst, which comprises the following steps: dissolving oxidized graphite in an organic solvent and obtaining oxidized graphene dispersion by ultrasonic processing; adding titanium salt precursor to the oxidized graphene dispersion and stirring evenly; transferring the mixed dispersion into a hydrothermal reaction kettle and reacting at 120-200 DEG C for 4-20 hours; respectively cleaning the product of the reaction by absolute ethyl alcohol and de-ionized water; and drying in vacuum at 40-80 DEG C for 8-24 hours to obtain the graphene / titanium dioxide composite photocatalyst. The invention has the advantages of common and easily obtained raw material, low cost and simple and safe preparation process, and in the obtained product, TiO2 particles can be evenly dispersed on the surface of the graphene, and stronger acting force is formed between the TiO2 particles and the surface of the graphene,thereby avoiding aggregation of the particles and effectively preventing restacking of graphene laminas. The graphene / titanium dioxide composite photocatalyst has good photocatalysis activity due to structural advantages and has potential application value in the fields of environment protection and solar cells.
Owner:EAST CHINA UNIV OF SCI & TECH

Preparation method and application of mordenite molecular sieve

The invention discloses a preparation method of a mordenite molecular sieve with a high silica-alumina ratio. The preparation method comprises the following three steps: (1) carrying out pre-crystallization on a mixture I containing a silicon source I, an aluminum source I, hydroxide of the alkali metal ion M', a template agent R1 and water to obtain a silicon-aluminum precursor; (2) aging a mixture II containing a silicon source II, an aluminum source II, hydroxide of alkali metal ions M, a template agent R2 and water to obtain structure-oriented sol; and (3) mixing the silicon-aluminum precursor and the structure-oriented sol, carrying out hydrothermal crystallization, and roasting to obtain the mordenite molecular sieve. According to the method, the mordenite molecular sieve with the silica-alumina ratio higher than 40 can be prepared, the mordenite molecular sieve is used as a catalyst for synthesizing methyl acetate through dimethyl ether carbonylation, the conversion rate of dimethyl ether is high, and the stability of the catalyst is obviously superior to that of a dimethyl ether carbonylation catalyst prepared from the mordenite molecular sieve synthesized through a one-step method under the same conditions.
Owner:YANCHANG ZHONGKE (DALIAN) ENERGY TECH CO LTD

Graphene-based nano iron oxide composite material and preparation method thereof

The invention discloses a graphene-based nano iron oxide composite material and a preparation method thereof. By the method, iron oxide nano granules with uniform diameter and controllable shape and components can be loaded on graphene. The method comprises the following steps of: uniformly dispersing graphite oxide into deionized water by adopting an ultrasonic method to obtain graphene oxide solution; adding an iron salt precursor into the obtained solution and mixing the precursor and the solution uniformly, adjusting the pH of the solution, and hydrolyzing the iron salt; putting the mixed solution into a reaction kettle and performing hydrothermal reaction; and finally, cleaning and freeze-drying the obtained product to obtain the graphene-based nano iron oxide composite material. The raw materials are common and easily obtained, the cost is low, and the preparation process is simple, safe and environmentally-friendly; the prepared graphene-based nano iron oxide composite material has good structural stability and monodispersity; when the composite material is used as a lithium iron battery electrode material, the charge / discharge capacity can reach over 1,000mAh / g; and the composite material has good multiplying power performance and cycle life.
Owner:CHINA UNIV OF MINING & TECH

Controllable crystalline form titanium dioxide and graphite alkene composite material with high efficient photoelectricity activity and preparation method thereof

The invention discloses controllable crystalline form titanium dioxide and a graphite alkene composite material with high efficient photoelectricity activity and a preparation method thereof. The composite material is formed by mixing TiO2 powder and graphite alkene or scattering the TiO2 powder in oxidized graphite alkene dispersing agents to perform hydro-thermal reaction. The mass ratio of TiO2 powder and graphite or graphite alkene is 1:1 to 500:1. The preparation method is simple, low in cost and environmental-friendly. The controllable crystalline form titanium dioxide and a graphite alkene composite material with high efficient photoelectricity activity can control crystalline form of the obtained TiO2 according to the ratio of alcohol and water or amount of titanium sources. When the amount is amplified, the controllable crystalline form titanium dioxide and a graphite alkene composite material with high efficient photoelectricity activity have good performances. After the graphite alkene is composed, photocatalysis is greatly improved. All obtained products are applied to fields of dye sensitization solar cells, catalysts, lithium ion cells, sensing and the like.
Owner:NANJING TECH UNIV

Inverted-Y-shaped elastic adhesive tape for effectively fixing stomach tube

The invention discloses a novel inverted-Y-shaped elastic adhesive tape for efficiently fixing a stomach tube, and relates to the field of apparatuses, tools or accessories special for surgery or diagnosis. The inverted-Y-shaped elastic adhesive tape with a proper size is cut from a medical desensitization adhesive tape roll, and the cut inverted-Y-shaped elastic adhesive tape comprises a head part, a body part, two arm parts and two leg parts, wherein the head part is elliptical, the long axis is 1.2-1.7 times of the short axis, the head part is sufficiently attached to the nose wing of a patient, and the leg parts are wound and attached to the external close-to-nose end of the stomach tube. The elastic adhesive tape has the advantages of being firm in fixing and effectively preventing the tube from falling. The use experience of the patient is good; the pressure injuries of nose skin and mucosa and swelling and itching of peripheral skin can still be effectively avoided when the stomach tube needs to be placed in vivo for a long time. The novel inverted-Y-shaped elastic adhesive tape has the outstanding advantages of being wide in application range, novel in shape, convenient touse, easy to popularize and the like, raw materials are easy to obtain, and the novel inverted-Y-shaped elastic adhesive tape is a novel medical consumable integrating economical efficiency and practicability.
Owner:AFFILIATED ZHONGSHAN HOSPITAL OF DALIAN UNIV
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