78 results about "Free diffusion" patented technology

The invention provides a method for simultaneously producing hydrogen peroxide and hydrogen through an autonomous oxygen supply double-cathode device. The device used by the method is provided with two cathodes and one shared anode, that is, the oxygen reduction cathode, the hydrogen evolution cathode and the oxygen evolution anode. In the autonomous oxygen supply double-cathode device, oxygen produced by the shared anode is freely diffused to the oxygen reduction cathode, and the hydrogen peroxide is generated on the surface of a catalyst layer of the oxygen reduction cathode in a in-situ reduction mode; and the hydrogen produced by the hydrogen evolution cathode is freely diffused out of a solution system and collected. Compared with a traditional method for producing hydrogen peroxide through oxygen reduction, the method does not need to additionally supply oxygen to the oxygen reduction cathode, and the other product hydrogen is also produced. Compared with a traditional sulfuric acid electrolysis method for preparing hydrogen peroxide and hydrogen, the method can further produce the two kinds of products and does not need the strong acid environment or the re-hydrolysis step.

A synchronization acquisition method of active phosphorus and iron in a deposit is disclosed; the principle of diffusive gradients in thin films (DGT) can be used, a fixing film and a diffusion film which are capable of performing phosphorus and iron synchronous enrichment are combined into a DGT acquisition device, the DGT acquisition device is put into the deposit for 2-6 days, active phosphorus and iron ions in the deposit pass through the diffusion film in a way of free diffusion, and then are acquired by the fixing film; after the DGT acquisition device is taken out, accumulation contents of phosphorus and iron on the fixing film can be respectively analyzed by use of a slicing-two step extraction-micro amount colorimetric method, and contents of the active phosphorus and iron in the deposit can be calculated by use of the Fick's first law of diffusion.

A method for measuring cytoplasm viscosity based on quantum dot three-dimensional tracing is disclosed. The method includes firstly introducing quantum dots into cells through a lipid Lipo-2000 transfection manner to achieve cell labeling; subjecting the single and recognizable quantum dots dispersed in the cells to three dimensional positioning and tracing by adopting an optical modulating mannerthrough a build quantum dot three-dimensional imaging system; further solving mean square displacement values MSDs which are motion parameters of the quantum dots by utilizing three-dimensional motion information; selecting quantum dots meeting free diffusion characteristics according to mathematical characteristics of the MSDs; finally solving diffusion coefficient D of the quantum dots in cytoplasm according to the MSD values for all the quantum dots meeting free diffusion characteristics; and further acquiring the cytoplasm viscosity according to a Stokes-Einstein equation. In a state thatcells survive, the cytoplasm viscosity can be accurately acquired by the method, visual three-dimensional motion information of molecules in cytoplasm can be obtained, and technical bases for researching intracellular material transportation, signal transmission, metabolism, differentiation, and the like are provided.

The invention discloses a hybrid material based on a macrocyclic compound photosensitive dye and titanium dioxide and a preparation method thereof, and application of the hybrid material to photocatalysis. The hybrid material comprises the macrocyclic compound photosensitive dye and titanium dioxide, wherein the macrocyclic compound photosensitive dye is a calixarene compound or porphyrin compound. The invention also discloses the preparation method for the hybrid material based on the macrocyclic compound photosensitive dye and titanium dioxide, and application of the hybrid material to photocatalysis. The organic-inorganic hybrid material prepared from the macrocyclic compound photosensitive dye and titanium dioxide has a hierarchical porous structure, and can improve the free diffusionof gas and surface adsorption of CO2, increase the adsorption quantity and activation degree of reactants, reduce the possibility of electron-hole recombination and effectively enhance photocatalysisefficiency. Moreover, the hybrid material of the invention has high stability and is improved in cyclic utilization stability in photocatalysis.

The invention discloses hollow porous cube nanometer nickel sulfide and a preparing method thereof. The material is of a hollow cube structure, has a coarse and porous surface and is formed by accumulating particles. In the method, with PBA as the precursor, the NiS of the hollow porous cube structure is prepared. The method is simple, easy to operate, short in reaction cycle and friendly to the environment. The synthesized nickel sulfide material is uniform in particle size, unified in morphology and stable and reliable in performance. Due to the hollow porous structure of the NiS, hydrogen peroxide is freely dispersed among the NiS nanoparticles; due to the huge specific surface area, hydrogen peroxide can be better adsorbed to the surface of the NiS for an electrocatalytic oxidation reaction.

The invention discloses a method for preparing a highly-uniform synthetic quartz glass weight. Preparing is conducted through a vertical depositing furnace based on chemical vapor deposition, raw materials are led into a combustor and chemically reacted in the depositing furnace, silicon dioxide particles are formed, the depositing foundation of the quartz glass weight is a concave depositing pool formed by a bottom face and a side wall, the silicon dioxide particles formed based on chemical vapor synthesis are melted and freely scattered and deposited in the depositing pool, and the temperature gradient of the depositing face is lower than 20 DEG C. According to the method for preparing the highly-uniform synthetic quartz glass weight, the distributing consistency of quartz glass weight components is improved, and the quartz glass weight uniform in radial and axial structure is produced.

The invention discloses a chitin/carbon nanotube composite adsorbent for blood perfusion and a preparation method thereof. The preparation method comprises the following steps of: by taking a natural macromolecular material chitin as a carrier, under a low-temperature stirring condition, performing freezing-unfreezing circulation so as to combine the chitin dissolved in an alkali/urea water solvent system with carbon nanotubes and form a uniform chitin/carbon nanotube composite solution, performing emulsification and thermal induction self-assembling process, thereby forming chitin/carbon nanotube composite nano fiber microspheres. The prepared microspheres have through hole canals applicable to free diffusion of bilirubin, have a good adsorption effect on combined bilirubin, and moreover are excellent in biocompatibility and blood compatibility. The composite nano fiber microspheres can be also fixed with an effective amount of high-activity ligand through covalent bonds, and the cleaning property and biocompatibility of the bilirubin of the microspheres can be further improved.

Provided in the invention is a sand-blasting-free diffusion nickel plating technology of a rectification monocrystalline silicon wafer. According to the invention, the oxidation technology, the electrolysis technology, and the ultra sand coarsening technology technology are used for replacing the traditional sand blasting technology. The provided technology has advantages of energy conservation and power consumption reduction, good noise-free and dust-free properties, low production cost, and high product quality and the like and thus is the preferred one for technical transformation of the ectification monocrystalline silicon wafer diffusion nickel plating enterprise.

The invention discloses a shale gas diffusion capability detection method, device and system and belongs to the field of shale gas exploitation. The method comprises acquiring shale sample data, when shale gas in a shale sample in an adsorption balance state freely diffuses, regularly acquiring an accumulative diffused gas amount of the shale gas in free diffusion to obtain diffusion data and calculating a shale gas diffusion coefficient and a shale gas flow coefficient according to the diffusion data and a first formula. Through adsorption effects of shale gas in a shale sample, the shale gas can freely diffuse in the shale sample and satisfies the real flow cases of a shale matrix block. Through the shale gas diffusion coefficient or the shale gas flow coefficient obtained through the diffusion data and the first formula, a shale gas diffusion capability is evaluated. The method can produce the accurate evaluation result and effectively show a shale gas flow capability in the shale sample.

The invention discloses a coal biological flora migration simulation experiment set and method. The set comprises a coal bed biology aerogenesis system, a strain migration and observation system and an experiment control and record system, wherein the coal bed biology aerogenesis system and the strain migration and observation system are a first box and a second box which are connected through a coaling pipe, and migration and observation can only be conducted on one coal sample during each time of work. Due to the fact that the initial liquid level of the first box is identical with that of the second box and gas generated after coal reacts with microorganisms can be discharged in time, flora diffusion is not affected by external force basically, and it is guaranteed that microorganisms are freely diffused through preset coal samples. By testing the indexes including identification of flora contained in liquid on the two sides of the unique microorganism migration channel, namely the coaling pipe, gas production rate, pH and Eh, the migration and diffusion rules of biological flora in different coal reservoirs are researched.

The invention belongs to the field of volume measurement of irregular inflatable envelope such as an airship envelope, and relates to a method for measuring airship airbag volume based on gas concentration change. The method for measuring the airship airbag volume based on the gas concentration change comprises the following steps of: detecting a gas volume concentration A1 (ppm), a temperature T1(DEG C), and a pressure p1 (Pa) of initial test gas in the airbag; charging the test gas into the airbag, and detecting a gas volume concentration A2 (ppm), a temperature T2 (DEG C), and a pressure p2 (Pa) of the test gas in the airbag; and a calculation formula of envelope volume as follows: V=22.4(delta)m/M{A2(273/273+T2)(P2/101325)-A1(273/273+T1)(P1/101325)}. The method for measuring the airship airbag volume based on the gas concentration change disclosed by the invention is easy to detect, can measure the airbag with any shape and any wrinkle due to free diffusion property of the gas, and even if a small amount of the test gas is added, the airship state is not affected.

The invention relates to a method for inhibiting the hole blocking effect of a vacuum filter using a near uniform strong magnetic field. The method is used for solving the problem of existing traditional vacuum filter that complete filtering is unavailable since the free-diffusion metal plasma generated by the focal spot wing (hereinafter called 'skirt') after focusing of high-power pulse laser acting on the edge of a filtering component (hereinafter called 'small hole') hinders the passage of the back edge of the laser pulse. In the invention, based on traditional vacuum filter, a near uniform strong magnetic field with certain magnitude is applied to the small hole, the metal plasma generated on the edge of the small hole by the focusing skirt of the high-power pulse laser moves in the direction of magnetic induction line, thus the plasma density at the center of the small hole is reduced, the hole blocking effect of traditional vacuum filter is effectively solved, and a good filtering effect of traditional vacuum filter is realized. The method provided by the invention has the characteristics of convenience in adjustment, simplicity and high efficiency, high practicability and the like.

The invention provides a high-precision and interval-controllable electrode and a preparing method of high-precision and interval-controllable electrodes. The method comprises the steps that firstly, a substrate is designed and prepared, wherein high surface energy regions and lower surface energy regions are alternately arranged on the substrate; the high surface energy regions are fully paved with a solution or emulsion including conductive fillers; then, evaporation diffusion is conducted, along with the volatilization of the solvent, the freely-diffused conductive fillers are gathered and arranged on the boundary regions, adjacent to the low surface energy regions, of the high surface energy regions, the lower surface energy regions serve as dams and are used for controlling the further diffusion of liquid drops, the diffused and arranged conductive fillers are solidified through heating or photon sintering and then form interval-controllable high-precision electrodes, and the intervals of the electrodes are controlled by the width of the high surface energy regions. The high-precision and interval-controllable electrode prepared through the method has important application on the aspect of preparing high-precision electrodes of devices such as transparent conductive films, high-end sensors, transistors, storage devices and capacitors.

The invention discloses a method and device for measuring the emanation medium radon exhalation rate in an open-loop mode. According to the method, the measurement of the radon exhalation rate is carried out by using the device. The device comprises a radon measuring instrument and a test column used for containing a to-be-tested emanation medium, a gas collecting cover is arranged above the testcolumn, the gas inlet of the radon measuring instrument is communicated with the gas collecting cover through an air pipe, the gas outlet of the radon measuring instrument is communicated with an external environment, a hole communicated with the external environment is formed in the upper surface of the gas collecting cover, a gas pressure equalizing chamber is arranged below the test column, thegas pressure equalizing chamber is connected with a gas pump through the gas pipe, and a flow regulator is arranged on the gas pipe between the gas pressure equalizing chamber and the gas pump. The method has the advantages that the free diffusion of the radon on the surface of the medium is considered, and the influence of the seepage effect is also considered. In addition, the device can accurately measure the radon exhalation rate of the surface of the medium in a short time.

The invention discloses a hybrid material on the basis of photosensitive metal-organic coordination nanometer cages and titanium dioxide, a method for preparing the hybrid material and application thereof. The hybrid material on the basis of the photosensitive metal-organic coordination nanometer cages and the titanium dioxide comprises the photosensitive metal-organic coordination nanometer cagesand the titanium dioxide. The hybrid material can be applied to photocatalysis. The hybrid material, the method and the application have the advantages that the organic-inorganic hybrid material madeof the photosensitive metal-organic coordination nanometer cages and the titanium dioxide is of a hierarchical porous structure, accordingly, free gas diffusion and CO2 surface adsorption can be improved, the adsorption quantities of reactants can be increased, the activation level of the reactants can be upgraded, the electron-hole pair composition probability further can be lowered, and the photocatalytic efficiency can be effectively enhanced.

In an apparatus in which an electrode pair formed of two electrodes including multiple mutually parallel linear electrode pieces is provided in a container for storing particles dispersed movably in a medium to form an spatially regularly arranged electric field, the particles are migrated in the container due to the formation of the electric field by the application of a voltage to the electrode pair to generate a diffraction grating resulting from density distribution of the particles, diffracted light obtained by applying light to the diffraction grating is measured, and a particle size analysis or the like is performed from the temporal change in the diffracted light in the free diffusion process of the particles by stoppage or modulation of the application of the voltage, by making width L of the electrode pieces of the electrode pair and a space distance S between the electrode pieces as follows:

L/(L+S)≦0.3,

steep attenuation of the diffracted light intensity is not generated at the initial stage of the diffusion of the particles to accurately measure the particle size distribution.

The invention discloses a method and a device for detecting ultrasonic flow by the time-difference method. The method includes: enabling to-be-tested gases to be freely spread into a static speed pipe when the to-be-tested gases flow through a pipe section of a measuring pipe provided with an ultrasonic transducer group, the static speed pipe is provided with ultrasonic transducers used for emitting and receiving ultrasonic waves into the static speed pipe, sonic path distance of the ultrasonic waves spreading in the static speed pipe can be obtained according to arrangement of the ultrasonic transducers on the static speed pipe, actual spreading time of the ultrasonic waves in the sonic path distance can be obtained by emitting and receiving the ultrasonic waves by the ultrasonic transducers in the static speed pipe, the spreading speed Cf of the ultrasonic waves can be obtained by dividing the actual spreading time of the ultrasonic waves in the static speed pipe by the sonic path distance, flow speed of the to-be-tested gases in the measuring pipe can be obtained by substituting the obtained spreading speed Cf of the ultrasonic waves into a calculation equation, and the flow of the to-be-tested gases can be obtained. By the method and the device for detecting the ultrasonic flow by the time-difference method, online detection of the spreading speed of the ultrasonic waves can be realized, and measuring accuracy can be improved.

This invention discloses WDM (wave division multiplex) components of low harass plain top of the optimize input terminal containing waveguide free diffusion zone, etched concave grating and output waveguide array. The end of the input waveguide is connected with curvilinear multi-module interference components with pre-spreading input. This invention has the following advantages: 1. The conical waveguide of the pre-spreading input can pre-spread the mode field of the input waveguide to change the plainness spectrum to a very steep dro pedge, so as to reduce the harass effectively. 2. The realization of plainness of the multi-mode interference zone is according to the self imaging principle to generate a mode field exciting and form multi-mode interfernece by input of the pre-spreading input waveguide to get two images at a certain distance at the output at last.