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21323 results about "Reaction conditions" patented technology

Reaction Conditions The environmental conditions, such as temperature, pressure, catalysts & solvent, under which a reaction progresses optimally. Catalysts are substances that accelerate the rate ( velocity ) of a chemical reaction without themselves being consumed or appearing as part of the reaction product.

Bio-electrochemically assisted microbial reactor that generates hydrogen gas and methods of generating hydrogen gas

Systems and processes for producing hydrogen using bacteria are described. One detailed process for producing hydrogen uses a system for producing hydrogen as described herein, the system including a reactor. Anodophilic bacteria are disposed within the interior of the reactor and an organic material oxidizable by an oxidizing activity of the anodophilic bacteriais introduced and incubated under oxidizing reactions conditions such that electrons are produced and transferred to the anode. A power source is activated to increase a potential between the anode and the cathode, such that electrons and protons combine to produce hydrogen gas. One system for producing hydrogen includes a reaction chamber having a wall defining an interior of the reactor and an exterior of the reaction chamber. An anode is provided which is at least partially contained within the interior of the reaction chamber and a cathode is also provided which is at least partially contained within the interior of the reaction chamber. The cathode is spaced apart at a distance in the range between 0.1-100 centimeters, inclusive, from the anode. A conductive conduit for electrons is provided which is in electrical communication with the anode and the cathode and a power source for enhancing an electrical potential between the anode and cathode is included which is in electrical communication at least with the cathode. A first channel defining a passage from the exterior of the reaction chamber to the interior of the reaction chamber is also included.
Owner:PENN STATE RES FOUND +1

Preparation method of metal organic framework based composite phase-change material

The invention relates to a preparation method of a metal organic framework based composite phase-change material. The method comprises the steps that a metal organic framework material substrate is prepared selectively; hole diameter size design and hole channel polarity regulation and control are performed on the substrate according to the size and the kind of a core material, so that a phase-change core material to be loaded is matched better; the soluble phase-change core material is prepared into a solution; a metal organic framework material is dispersed in the prepared phase-change material solution; a phase-change material is adsorbed by utilizing an extra-large specific surface area and a nano hole channel structure of the metal organic framework material; drying is performed; and then the metal organic framework composite phase-change material with a shaping effect is obtained. According to the method, a novel metal organic framework based composite phase-change material is developed; the prepared metal organic framework based composite phase-change material can effectively avoid leakage and the like, and has the advantages of adjustable nano hole structure and wide core material selection range; the method is simple in technology and mild in reaction condition, and is suitable for scale production; and a raw material is cheap and easy to obtain.
Owner:UNIV OF SCI & TECH BEIJING

Graphene nano sheet/MoS2 composite nano material and synthesis method thereof

The invention discloses a graphene nano sheet/MoS2 composite nano material and a synthesis method thereof. The method comprises the following steps of: preparing a graphite oxide nano sheet from graphite by using a chemical oxidation method, then dissolving molybdate into deionized water to form a solution of 0.02 to 0.07M, and adding thioacetamide or thiourea serving as a sulfur source and a reducer, wherein the mass ratio of the thioacetamide or the thiourea to the molybdate is 5:1-12:1; and adding the graphite oxide nano sheet into the solution, performing ultrasonic treatment for 1 to 2 hours so that the graphite oxide nano sheet is fully dispersed in a hydrothermal reaction solution, transferring the mixture into a hydrothermal reaction kettle, sealing, reacting for 20 to 36 hours at the temperature of between 220 and 260 DEG C, and obtaining the graphene nano sheet/molybdenum disulfide composite nano material by one-step hydrothermal synthesis, wherein the mass ratio of the graphene nano sheet to the molybdenum disulfide in the composite material is 1:2-4:1. The method has the characteristics of mild reaction condition and simple process. The synthesized graphene nano sheet/molybdenum disulfide composite nano material serving as an electrochemical lithium storage and electrochemical magnesium storage electrode material has wide application.
Owner:ZHEJIANG UNIV

Method for preparing graphene modified by silane coupling agent

The invention discloses a method for preparing graphene modified by a silane coupling agent. The method includes adding graphite oxide and the silane coupling agent into reaction solvent, controlling the temperature to range from 0 DEG C to 90 DEG C, realizing stirred reaction for 0.1 to 72 hours and obtaining graphite oxide grafted with the silane coupling agent; adding the graphite oxide grafted with the silane coupling agent into reduction solvent, adding a reducer into the reduction agent, controlling the temperature to range from 0 DEG C to 90 DEG C, realizing stirred reduction reaction for 0.1 to 72 hours and obtaining graphene liquor grafted with the silane coupling agent; and treating the graphene liquor grafted with the silane coupling agent and then obtaining solid graphene powder modified by the silane coupling agent. The mass ratio of the graphite oxide and the silane coupling agent is 1:0.1-5. The technological method is simple and speedy, requirements on reaction conditions are low, a process is easy to control, and the graphene modified by the silane coupling agent can be obtained without catalysts or multi-step complicated reaction. The graphene is fine in polymer compatibility and simple in preparation and can be widely applied to fields of preparation of graphene modified polymers and novel electrochemical electrodes and novel optical and conductive materials, raw materials are easily available, and a product has good dispersibility in partial organic solvent.
Owner:NANJING UNIV

Method for preparing silver nanometer wire with controllable wire diameter by cation control microwave method

The invention provides a method for preparing silver nanometer wire with controllable wire diameter by a cation control microwave method, aiming at solving the problems of rough wire diameter, low diameter ratio and the like during preparation of the silver nanometer wire by the traditional microwave method. The method comprises the following steps of: (1) adding a mixture of silver nitrate powder and a dispersing agent into ethylene glycol and preparing a solution reaction system containing silver ions; (2) adding a cation control agent in the solution reaction system containing silver ions and evenly stirring to obtain a reaction precursor; and (3) irradiating the reaction precursor under microwave, centrifuging, ultrasonically washing and drying the solution prepared through microwave irradiation to obtain the silver nanometer wire powder with controllable wire diameter. The invention has the advantages of simple preparation method, high efficiency and low cost and ensures that the high-quality silver nanometer wire can be prepared repeatedly within wide range of reaction condition. By using a soft template method, the size of the wire diameter is controlled by using the cation control agent without introducing any impurity.
Owner:JIANGSU NANOWELL ADVANCED MATERIALS SCI&TECH
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