44results about How to "Efficient catalytic effect" patented technology

The invention belongs to the technical field of water treatment and discloses a device and a method for coordinating cathode and anode to degrade nitrate on the basis of taking zero-valent iron loadednanometer composite resin as a catalyst. The device comprises an anode, a water inlet pipe, a cathode, zero-valent iron loaded nanometer composite resin and a water outlet pipe; the cathode is a hollow cylinder body; the internal space of the cathode is filled with the zero-valent iron loaded nanometer composite resin uniformly; the cathode and the zero-valent iron loaded nanometer composite resin form a resin column; and the anode is inserted into the internal space of the resin column. The method comprises the following steps: a) synthesizing the zero-valent iron loaded nanometer compositeresin and filling the device with the resin; and b) pumping a nitrate solution taking chlorine salt as electrolyte into the device through the water inlet pipe, switching on the device, applying voltage to perform treatment, and guiding out the output water through the water outlet pipe after treatment. According to the method, the resin serves as a carrier, the zero-valent iron serves as the catalyst, the nitrated is converted into nitrogen under the coordination of the cathode and the anode to be discharged, and important value in the environmental pollution treatment is achieved.

The invention belongs to the field of catalyst preparation methods in petrochemical industry, and more specifically relates to a preparation method and application of a polyaniline-loaded heteropolyacid-supported olefin epoxidation catalyst. The invention provides a preparation method of an olefin epoxidation catalyst for polyaniline-loaded heteropolyacids. The integrated polyaniline-loaded heteropolyacid catalyst is synthesized by a one-pot method, which has the advantages of simple process and easy scale-up. Its application In the olefin epoxidation reaction, the conversion rate of hydrogen peroxide is ≥ 97%, the yield of epoxidized products is ≥ 85%, and the selectivity is ≥ 90%. The catalyst has the advantages of strong versatility, stable activity and high recovery rate during the use of the catalyst , is a catalyst preparation method that is easy to realize industrialization.

The invention provides a production method of copper-cone-shaped copper nicotinate micron materials. The copper nicotinate which is of a micron structure is produced by a one-step method, different shapes of micron structures can be obtained through control on the use of reactants, a quadrangle, a hexagon, an octagon and the like are formed along with different proportions of a reaction, the middle portion is hollow, the appearance is similar to a copper coin, and the particle parameter is within the range of 3 to 9 microns and the wall thickness is within the range of 1 to 5 micro nanometers through the representation of a scanning transmission electron microscopy. The copper-cone-shaped copper nicotinate micron materials can serve as a novel efficient recyclable catalyst so as to degrade the nitrophenol wastewater. The synthesis method is simple and easy to operate, the yield is high, the catalytic reaction is rapid, and the catalyst can be recycled.

The invention discloses a multi-element doped carbon nano-tube array modified carbon fiber, a preparation method and applications thereof, and belongs to the field of carbon nanometer materials. The preparation method comprises: depositing an array template on carbon fiber, coating the array template with an imidazole tetrafluoroborate and / or imidazole hexafluorophosphate ionic liquid in a dropwise manner, and calcining to carbonize the ionic liquid so as to make the nitrogen element and / or the boron element and the phosphorus element in ionic liquid enter the carbon layer in a co-doped manner; and removing the array template to obtain the multi-element doped carbon nano-tube array modified carbon fiber. According to the present invention, the preparation process is simple; the formed multi-element doped carbon nano-tube array can significantly increase the specific surface area of the modified electrode; various heteroatoms doped into the carbon material form the structural defects and the non-uniform charge distribution in the vicinity of adjacent carbon atoms, such that the carbon material has rich active sites and high electrocatalytic activity; and the multi-element doped carbon nano-tube array modified carbon fiber is used for preparing a self-supporting flexible microelectrode for detecting the hydrogen peroxide content.