39results about How to "High charge transfer capability" patented technology

The invention relates to a ZnO photocatalytic material modified with porous carbon and a preparing method thereof. The ZnO photocatalytic material modified with porous carbon includes zinc oxide nanometer particles and amorphous porous nanometer carbon. The zinc oxide nanometer particles are covered with the amorphous porous nanometer carbon largely or the amorphous porous nanometer carbon is doped in gaps among the zinc oxide nanometer particles largely. The method has characteristics of a simple preparing process, mild reaction conditions, easy control, and the like. The material has a high specific surface area, high CO2 adsorptivity, visible-light response and charge transfer capabilities, effectively overcomes disadvantages which are a small specific surface area, a high photo-induced electron hole pair recombination rate and a low photocatalytic efficiency of a single zinc oxide photocatalyst, greatly increases the solar energy utilization efficiency, and has a wide application prospect in the fields of photocatalysis, electrochemistry, energy, environment, and the like.

A cochlear stimulation device comprising an electrode array designed to provide enhanced charge injection capacity necessary for neural stimulation. The electrode array comprises electrodes with high surface area or a fractal geometry and correspondingly high electrode capacitance and low electrical impedance. The resultant electrodes have a robust surface and sufficient mechanical strength to withstand physical stress vital for long term stability. The device further comprises wire traces having a multilayer structure which provides a reduced width for the conducting part of the electrode array. The cochlear prosthesis is attached by a grommet to the cochleostomy that is made from a single piece of biocompatible polymer. The device, designed to achieve optimum neural stimulation by appropriate electrode design, is a significant improvement over commercially available hand-built devices.

The invention discloses a polyaniline-based MOF nanocomposite flexible supercapacitor and a preparation method thereof. MIL-101 is one of MOF materials with excellent acid-resistance stability. The method provided by the invention comprises the steps that a PANI / MIL-101 composite material is prepared; the PANI / MIL-101 composite material, acetylene black and polyvinylidene fluoride (PVDF) are uniformly dispersed in N-methyl-2-pyrrolidone (NMP) in a certain proportion to form a slurry, and the slurry is coated on carbon fiber cloth to form electrodes; a gel electrolyte is used to symmetrically stack two electrodes, and the middle space is separated by a diaphragm; and the electrodes are packaged to prepare the flexible supercapacitor. The specific capacity of the electrode material is up to1197 F / g. The prepared supercapacitor has only 10% attenuation of the specific capacity after 1000 times of bending. The cyclic stability test 10000 cycles can maintain more than 90% of the specific capacity. Four supercapacitors are connected in series to light up a 1.8V red LED. The flexible supercapacitor prepared by the invention has good flexibility and electrochemical performance, and has agood application prospect in the aspects of flexible electronic devices and energy storage.

A cochlear stimulation device comprising an electrode array designed to provide enhanced charge injection capacity necessary for neural stimulation. The electrode array comprises electrodes with high surface area or a fractal geometry and correspondingly high electrode capacitance and low electrical impedance. The resultant electrodes have a robust surface and sufficient mechanical strength to withstand physical stress vital for long term stability. The device further comprises wire traces having a multilayer structure which provides a reduced width for the conducting part of the electrode array. The cochlear prosthesis is attached by a grommet to the cochleostomy that is made from a single piece of biocompatible polymer. The device, designed to achieve optimum neural stimulation by appropriate electrode design, is a significant improvement over commercially available hand-built devices.

The invention relates to the technical field of electrocatalysis, and discloses a monatomic iron-sulfur-nitrogen co-doped carbon aerogel electrocatalyst and a preparation method and application thereof. Iron in the carbon aerogel electrocatalyst is dispersed in sulfur-nitrogen co-doped carbon aerogel in a monatomic form, and the content of iron atoms in the electrocatalyst is 0.1-1wt%, the contentof sulfur atoms is 2-6wt%, and the content of nitrogen atoms is 2-10wt%; the specific surface area of the carbon aerogel electrocatalyst is 150-500 m < 2 > g <-1 >, the pore volume is 0.01-0.1 cm < 3> g <-1 >, and the pore size is 2-10 nm. Urea is dissolved, and then carrageenan and ferric nitrate are added until carrageenan and ferric nitrate are completely dissolved; the aerogel formed by freeze drying of the obtained mixed solution is calcined and subjected to acid treatment to obtain the electrocatalyst, and the electrocatalyst can be used for catalyzing nitrogen to be reduced into ammonia and zinc-nitrogen batteries and has the advantages of being high in catalytic activity, simple in preparation method, easy to operate and low in cost.

The invention discloses a nitrogen-doped carbon quantum dot / metal organic framework material MOF-5 photocatalyst as well as a preparation method and application thereof, and relates to the field of photocatalyst preparation. A natural resource coconut shell is used as a raw material, nitrogen-doped carbon quantum dots are prepared by a hydrothermal method, and the nitrogen-doped carbon quantum dots are introduced when a metal organic framework material MOF-5 is prepared by an in-situ synthesis method. During photocatalysis, the nitrogen-doped carbon quantum dot / metal organic framework material MOF-5 photocatalyst improves the conductivity, the stability and the photocatalytic performance of the metal organic framework material MOF-5 by utilizing the high charge transfer capability and the molecular oxygen activation capability of the nitrogen-doped carbon quantum dots (N-CQD). The method is short in technological process, raw materials are low in price and easy to obtain, the method is a very ideal preparation method of the photocatalyst nitrogen-doped carbon quantum dot / metal organic framework material MOF-5, and the nitrogen-doped carbon quantum dot / metal organic framework material MOF-5 photocatalyst prepared through the method has very good photocatalytic performance on hexavalent chromium and can be widely applied to treatment of chromium-containing wastewater.

The invention discloses a NiCo2O4 nano flower-like composite material (NiCo2O4-NF). The composite material is a flower-like structural material with loose NiCo2O4 nanosheets uniformly distributed at the surface. A cell assembled by using the composite material as a counter electrode exhibits superior photoelectric conversion performance: under the same conditions, photoelectric conversion efficiency of the dye-sensitized solar cell containing the NiCo2O4-NF counter electrode material is as high as 7.90% and is higher than that of 7.45% of a conventional cell containing commonly-used counter electrode noble metal platinum (Pt); and in addition, the NiCo2O4-NF exhibits better faradaic pseudocapacitance performance when used as an active electrode material: the specific capacitance reaches 817.5 F*g<-1>. The composite material provided by the invention is prepared by the one-step hydrothermal method, and has a simple preparation process, a low price and no pollution, can replace the Pt asa counter electrode to be used in the dye-sensitized solar cell and be used as an excellent active electrode to be used for supercapacitors, and has great application prospects in terms of energy storage.

The invention discloses a starburst non-fullerene organic small molecule receptor material containing pyrene and perylene diimide and a preparation method of the starburst non-fullerene organic smallmolecule receptor material. The non-fullerene organic small molecule receptor material is bridged with condensed nucleus pyrene and perylene bisimide units through triple bonds, the obtained materialhas good thermal stability, raw materials are common and easy to obtain and can be purified through recrystallization, and the production cost is low; and the starburst non-fullerene organic small molecule receptor material is applied to a polymer solar cell, the effect with the energy conversion efficiency being 6-8% can be achieved under the condition of an optimizing device, the starburst non-fullerene organic small molecule receptor material serves as a third component to be added into a ternary solar cell active layer, the density of a short-circuit current of the ternary solar cell active layer can be remarkably increased, the effect with the energy conversion efficiency being 8-11% can be achieved, and certain practical application value is achieved.

The invention discloses a high efficiency organic small molecule receptor material, a preparation method and application thereof. The method includes: taking 2, 7-dibromobenzo[b]benzo[4, 5]thieno[2, 3-d]thiophene (BTBT) and difluoro-indandione as the raw materials, carrying out Suzuki-Miyaura coupling reaction, Friedel-Crafts reaction, Vilsmeier-Haack reaction and Knoevenagel condensation reaction to synthesize A-D-A type organic small molecule receptor material shown as formula (I). The obtained material can be purified by recrystallization and has good thermal stability. By applying the material to polymer solar cells, under the condition of optimizing devices, 12.66% energy conversion efficiency can be acquired, and the material has certain practical application value.

The invention relates to the technical field of nano catalytic materials, and discloses a two-dimensional nickel telluride supported palladium monatomic catalyst and a preparation method and application thereof.The catalyst takes a two-dimensional nickel telluride nanosheet as a carrier and loads palladium monatomic; wherein the thickness n of the two-dimensional nickel telluride nanosheet is greater than 0 nm and less than or equal to 5 nm, and the loading capacity of palladium single atoms is 0.1-0.5 wt%. The preparation method comprises the following steps: by taking nickel nitrate, urea and ammonium fluoride as raw materials, preparing Ni(OH)2 by a hydrothermal method; carrying out telluridation reaction on the two-dimensional nickel telluride nanosheet, sodium tellurite and hydrazinehydrate in a solvent to obtain a two-dimensional nickel telluride nanosheet; impregnating the two-dimensional nickel telluride nanosheet in a palladium salt solution, and then carrying out annealing and acid pickling to produce the catalyst. The catalyst not only can prevent Pd monogen from being agglomerated and falling off, but also can further improve the oxygen adsorption and product dissociation capacity of the catalyst, so that the electrocatalytic activity is improved.

The invention discloses a manganese phosphate lithium / lithium vanadium fluorophosphate / carbon composite anode material and a preparation method thereof, and aims to improve the ion eclectic conductivity and the circulation stability of manganese phosphate lithium and thus overcome defects that a manganese phosphate lithium anode material is poor in rate capability and poor in circulation stability. The composite material disclosed by the invention has a nominal molecular formula of (1-x)LiMnPO4*xLiVPO4F / C, and in the formula, x is greater than 0 and less than or equal to 0.3. The synthetic composite material has primary particles of 60-100nm in size, and the surfaces of the particles are coated by a layer of a uniform carbon source. The preparation method disclosed by the invention is simple in process and easy to control, and due to synergetic functions of the components, the prepared (1-x)LiMnPO4*xLiVPO4F / C composite anode material has the characteristics of being high in energy density, stable in circulation and good in rate capability.

The invention discloses a preparation method and application of a bifunctional electrocatalyst, and belongs to the technical field of electrocatalytic materials. According to the technical scheme, the preparation method is characterized in that an MOF precursor is introduced into a high-conductivity one-dimensional carrier shell layer in situ and then is stably compounded with a metal current collector, then electrochemical in-situ activation is carried out, and finally the OER / HER bifunctional electrocatalyst is prepared. The nano bifunctional electrocatalyst prepared by the invention has a multi-stage assembly structure and a multi-dimensional material composite structure characteristic, is beneficial to improving the electrocatalytic activity of the bifunctional electrocatalyst OER / HER and prolonging the service life of the bifunctional electrocatalyst OER / HER, and has a relatively good application prospect in catalysis of water splitting.

The invention discloses a high-performance self-powered NO2 sensor based on a nitrogen-doped MOF-derived In2O3 core-shell fiber structure sensitive material and a preparation method of the high-performance self-powered NO2 sensor, and belongs to the technical field of semiconductor metal oxide gas sensors. The flexible NO2 sensor is composed of a friction nanometer generator and a flexible NO2 sensor based on a nitrogen-doped MOF-derived In2O3 core-shell fiber structure. The nitrogen-doped MOF-derived In2O3 core-shell fiber structure sensitive material prepared by the invention has layered pores of a core-shell structure and effective doping of nitrogen, so that reconstruction of a surface electronic state is facilitated, the gas-sensitive characteristic of a sensor to NO2 is effectively improved, and the material has good selectivity and relatively low detection lower limit. According to the self-powered NO2 sensor, the sensor and the friction nanometer generator are integrated, preparation of the self-powered NO2 sensor is achieved, resistance signals are converted into voltage signals, the sensitivity of the sensor is effectively improved, the response time is shortened, and an effective strategy is provided for high-performance and self-powered NO2 detection at the room temperature.

The invention provides a lithium iron phosphate / lithium vanadium phosphate / carbon composite positive electrode material and a preparation method thereof, the molecular formula of which is (1-x)LiFePO 4 ·xLiVPO 4 F / C, where x=5-40wt%, and the mass fraction of C in the composite cathode material is 0.5-2.0wt%. The present invention first synthesizes lithium iron phosphate, and then synthesizes VPO 4 Intermediate, finally lithium iron phosphate, VPO 4 The intermediate is mixed with other raw materials for the synthesis of lithium vanadium phosphate, and then pressed and sintered to ensure that there is no heterophase formation of lithium vanadium phosphate in the composite material, and a composite structure with a dual-phase lithium intercalation active material is formed in the composite material to stabilize phosphoric acid The surface properties of iron-lithium materials can improve the surface / interface diffusion capacity of lithium ions and the transport rate of electrons, and improve their rate performance and cycle performance without sacrificing energy density.

The invention provides an organic electroluminescent material, a preparation method and applications thereof, wherein the organic electroluminescent material has a structure represented by the following formula I. According to the invention, the organic electroluminescent material has high charge transfer capability and high glass-transition temperature, and can prevent crystallization; and with the application of the organic electroluminescent material in OLED devices, the OLED device can have high efficiency, long service life, low driving voltage and wide application prospect.

The present invention provides an organic light emitting material and an OLED device comprising the same, wherein the organic light emitting material has a structure represented by the following formula I. According to the invention, the organic light emitting material has high stability, high charge transfer ability and high glass transition temperature, and is suitable for being used as an electron transport layer main body material of an OLED device and emits green fluorescence, so that the OLED device obtains high efficiency (more than 76 Cd / A), long service life (LT95 is more than 130 hours) and low driving voltage (less than 4.3 V).

The invention discloses an organic small molecule acceptor material and its preparation method and application. Suzuki‑Miyaura coupling reaction starting from 2,7‑dibromobenzo[b]benzo[4,5]thieno[2,3‑d]thiophene (BTBT) and difluoro‑indandione , Friedel-Crafts reaction, Vilsmeier-Haack reaction and Knoevenagel condensation reaction to synthesize A-D-A type organic small molecule acceptor material, as shown in formula (I), the resulting material can be purified by recrystallization, and has good thermal stability. When it is applied to polymer solar cells, an energy conversion efficiency of 12.66% can be obtained under optimized device conditions, which has certain practical application value.

The invention provides a compound and application thereof, the compound has a structure as shown in formula I. The compound can be used as an electron transport material, and has high stability, high charge transfer capability and high glass transition temperature. And when the compound is applied to an organic electroluminescent device, relatively high luminous efficiency, relatively low driving voltage and relatively long service life can be obtained.

The invention discloses a preparation method of a nano cobalt hexacyanocobaltate / nitrogen-doped porous carbon composite material. By taking biological protein rich in natural resources as a raw material, taking a strong alkali solution as a medium, taking tris(2-hydroxyethyl)isocyanurate (THEIC) as a cyano providing source and taking cobalt salt as a raw material, the nano Co3[Co(CN)6]2 / nitrogen-doped porous carbon composite material is prepared through one-step high-temperature pyrolysis of a precursor mixture. Compared with a traditional solution chemical compounding method, the method has the advantages that the binding force between two components in the composite material is enhanced, and meanwhile, the charge transfer capacity between the two components is improved; in addition, biological protein is protein rich in nitrogen element, and a self-doped nitrogen-doped porous carbon material is formed after carbonization, so the wettability of the material in an aqueous electrolyte is improved, Co3[Co(CN)6]2 particles are uniformly embedded in nitrogen-doped porous carbon with a high specific surface area in a nanocrystallization manner, and the conductivity and the reaction rate of the material are greatly improved in the charging and discharging process.

The invention relates to a compound for organic luminescence, the structure of the compound is shown as a formula (I): wherein R1-R5 are respectively and independently selected from hydrogen, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, and a substituted or unsubstituted alkyl group; l is selected from substituted or unsubstituted phenyl and substituted or unsubstituted heteroaryl. The compound for organic light emission can be used as an electron transport material, and not only has high stability, but also has high charge transfer capability and high glass transition temperature.

The invention relates to a porous carbon-modified ZnO photocatalytic material and a preparation method thereof. The porous carbon-modified ZnO photocatalytic material is composed of zinc oxide nanoparticles and amorphous porous nanocarbon. The amorphous porous nanocarbon is mainly coated on the surface of zinc oxide nanoparticles or doped in the gaps between zinc oxide nanoparticles. middle. The preparation method has the characteristics of simple preparation process, mild reaction conditions, and easy control. The resulting material has both high specific surface area and high CO 2 The adsorption capacity, visible light response and charge transfer ability effectively solve the shortcomings of a single zinc oxide photocatalyst such as small specific surface area, high photogenerated electron hole pair recombination rate, and low photocatalytic efficiency. At the same time, it greatly improves the utilization efficiency of solar energy. In photocatalysis It has broad application prospects in fields such as , electrochemistry, energy, and environment.

The invention provides an electron transport material, an organic electroluminescent device and a compound with a nitrogen heterocyclic structure. The technical scheme provided by the invention not only has higher stability, but also has high charge transfer capability and high glass transition temperature.

The invention discloses a porous graphene-based double transition metal selenide heterojunction composite material. The composite material comprises a porous graphene matrix and Ni0.85Se / CoSe polygonal nanoparticles loaded on the surface of the porous graphene matrix. According to the invention, a metal selenide heterojunction structure is constructed on a porous graphene matrix, so that a sodium ion cross-layer transport path can be effectively provided, and the graphene-based metal selenide heterojunction composite material has high ionic conductivity, small volume change in a working process, high reversible capacity and excellent rate and cycle performance; when the composite material is used as the negative electrode of the sodium ion battery, the selenide heterojunction structure close to the graphene hole can effectively reduce the structure and volume change, shorten the ion transmission distance, and effectively enhance the electrochemical stability and improve the capacity in the charging and discharging process; the sodium ion energy storage requirements of high specific capacity, long service life and safety can be met, and the method is suitable for popularization and application.

The invention provides a charge transport material and an organic electroluminescent device, the charge transport material has a compound, R1 to R6 are respectively and independently hydrogen, deuterium, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 heteroaryl group and a substituted or unsubstituted C1-C50 alkyl group, and R1 to R6 are independently hydrogen, deuterium, a substituted or unsubstituted C6-C60 heteroaryl group, a substituted or unsubstituted C6-C60 heteroaryl group, a substituted or unsubstituted C6-C60 heteroaryl group and a substituted or unsubstituted C1-C50 alkyl group. L1 to L3 are respectively and independently a directly bonded, substituted or unsubstituted C1-C20 aryl or arylene group, and X1 to X6 are respectively and independently O, S or C. According to the technical scheme, the charge transport material and the organic electroluminescent device with the charge transport material not only have high stability, but also have high efficiency and thermal stability.

The invention discloses a preparation method of a mesoporous titanium dioxide nano composite material coated with iron oxyhydroxide. The preparation method comprises the following steps: preparing a FeOOH (at) mTiO2 nano composite material, taking FeCl3. 6H2O as a precursor, taking tetrabutyl titanate as a titanium source, and taking ammonia water as a pore regulator. As a nano composite material, the nano composite material is used for capturing exosomes and is combined with an electrochemical sensor to establish a method for quantitatively detecting the exosomes. The method for quantitatively detecting the exosome by the electrochemical sensor, which is simple to operate and high in sensitivity, is realized by taking the FeOOH (at) mTiO2 nano composite material as an electrode material.

The invention provides an oxadiazole-substituted organic light-emitting material and an OLED device. The oxadiazole-substituted organic light-emitting material is a compound with an oxadiazole-substituted sulfur-containing spiro structure. The technical scheme of the invention has high charge transfer capability and better thermal stability, and can be well suitable for high efficiency and stability during operation or storage of the organic light-emitting device.

The invention relates to a preparation method for a hypercrosslinked layered microporous polymer. The preparation method comprises the following steps: firstly, preparing flaky molybdenum disulfide with sodium molybdate and thiourea respectively as a molybdenum source and a sulfur source, then allowing diazonium salt to grow on the flaky molybdenum disulfide through a direct grafting method, and carrying out diazonium salt functionalization so as to form a MoS2-PANI conductive polymer; furtherly, adding a copolymer of organic matter polyvinyl alcohol, vinyl benzyl chloride and divinyl benzene under the action of an azodiisobutyronitrile polymeric initiator so as to obtain a hypercrosslinked longer-chain conductive polymer; and finally, controlling reaction temperature and time, and carrying out Friedel-Crafts reaction under the catalytic action of FeCl3 so as to obtain the layered hypercrosslinked microporous polymer conductive material MoHCPs. Compared with the prior art, the preparation method provided by the invention has the characteristics of simple preparation process and required equipment, significantly decreased reaction temperature, easily available raw materials, easiness in implementation of large-scale production, etc.

The invention relates to the technical field of electrocatalysis, and discloses a monoatomic iron-sulfur-nitrogen co-doped carbon aerogel electrocatalyst and its preparation method and application. In the carbon aerogel electrocatalyst, iron is dispersed in the form of a single atom In the carbon airgel co-doped with sulfur and nitrogen, the content of iron atoms in the electrocatalyst is 0.1-1wt%, the content of sulfur atoms is 2-6wt%, and the content of nitrogen atoms is 2-10wt%; the carbon aerogel electrocatalyst The specific surface area is 150~500m 2 g ‑1 , pore volume 0.01~0.1cm 3 g ‑1 , the pore size is 2-10nm; after dissolving urea, add carrageenan and ferric nitrate to dissolve completely; the airgel formed by the freeze-drying of the obtained mixed solution is calcined and acid-treated to obtain the electrocatalyst of the present invention, which can be used to catalyze Nitrogen is reduced to ammonia and a zinc-nitrogen battery has high catalytic activity, and the preparation method has the advantages of being simple, easy to operate and low in cost.

The invention discloses a polypyrrole and metal nano-particle composite gas sensor and a production method thereof. The gas sensor adopts a ceramic matrix with interdigital gold electrode pairs; the surfaces of the ceramic matrix and the gold electrodes are covered with polypyrrole and palladium nano-particle composite gas-sensing films. The invention has simple production technique and low cost,which is particularly suitable for mass production. The prepared element has the advantages of high sensitivity, fast response, good recovery, strong stability, good selectivity and room temperature detection in ammonia detection, and can be widely used for accurate detection and control of ammonia gas in atmospheric environmental monitoring in the industrial and agricultural production processes.

The invention provides a lithium ion battery electrolyte and a lithium ion battery containing the electrolyte. The lithium ion battery electrolyte comprises a non-water organic solvent and lithium salt, wherein the non-water organic solvent comprises propylene carbonate. The lithium ion battery electrolyte also comprises an additive having a general formula shown in the description. In the formula, n is in a range of 1-5, R1 is C1-C5 alkane, and R2 is C1-C5 alkane. Based on the total weight of the organic solvent, the content of propylene carbonate is 10-50 wt%, and based on the total weight of the electrolyte, the content of the additive is 0.1-5 wt%. The provided electrolyte enables high and low temperature performance of the battery to be obviously improved, and the operating temperature range of the lithium ion battery electrolyte is broadened. Any one of natural graphite, artificial graphite, and mixed graphite can be selected as a negative electrode of the battery.