218 results about "Glass electrode" patented technology

The invention discloses a graphene/polyaniline composite membrane based pH detecting electrode. The graphene/polyaniline composite membrane based pH detecting electrode comprises an electrode body and a graphene/polyaniline composite membrane covering the outer surface of the electrode body, wherein the electrode body is selected from one of an ITO glass electrode, a stainless steel gold plated electrode and a gold disc electrode. The invention also discloses a preparation method of the pH detecting electrode. The preparation method comprises the following steps: (1) pretreating the electrode; (2) preparing electrolyte; and (3) carrying out electrochemical polymerization. The invention also discloses an application method of the pH detecting electrode. The pH detecting electrode is used for detecting the pH of a phosphate buffer solution, oxidation peak potential acts as a detecting signal, and the pH value within the range of 1-11 can be detected. Compared with a common pH detecting electrode, the graphene/polyaniline composite membrane based pH detecting electrode is smaller in size, is lower in price, is more convenient in detection, and does not require special treatment before and after use. The compounding of graphene and polyaniline obviously improves the pH detecting effect of the electrode.

The electroporation array is comprised of three technologies: microwire glass electrodes, microelectronic multiplexer stimulator chips and microfluidic flow chamber. Various substances, such as genes, gene silencing RNAi, gene inhibition agents or drugs, can be perfused into the microfluidic flow chamber. The entry of the various substances into the cells will be facilitated by electroporation. An applied electric potential causes nanoscale pores to open in the cell membrane allowing substances in the solution to freely diffuse into the cell. The specific cells selected for electroporation are defined using the computer controlled microelectronic stimulator array. An “image” of which electrodes within the array to apply the electric potential to, and thus electroporate, is de-multiplexed onto the array. All the selected electrodes deliver a current pulse varied by the intensity of the de-multiplexed “image”. By serially perfusing different substances across the cells or tissue and electroporating different areas of the cell or tissue culture, it will be possible to have different cells within the culture contain different genes, gene silencing RNAi, gene inhibition agents, drugs, chemicals or other substances or sets thereof. It is also possible to re-electroporate subsets of cells on the array to allow for multiple gene combinations. In essence, this invention allows for the creation of cell arrays and would be analogous to gene arrays, which have been so important in recent advances in biotechnology, such as the human genome project.

The invention discloses a mirror reflection type electrochromic device and a preparation method thereof. The electrochromic device comprises transparent conducting glass, an insulating spacer, gel electrolyte, zinc oxide (ZnO) nanocrystallines and aluminum zinc oxide (AZO) transparent conducting glass. The preparation method comprises the following specific steps: directly growing the ZnO nanocrystallines on an AZO transparent glass electrode to form a coarse surface; uniformly mixing silver ion inorganic salt, bromide or iodide salt, auxiliary conducting ion inorganic salt and high-molecular polymer in organic solvent to from the transparent, stable and uniform gel electrolyte; using an encapsulating material to encapsulate the gel electrolyte between the transparent conducting glass with smooth surface and the AZO transparent conducting glass with coarse surface. The mirror reflection type electrochromic device has the advantages of simple technology and low cost, and large-area dimming devices with high reflectance, high transmittance and quick response capacity can be assembled.

The invention discloses an automatic three-spot calibration and temperature compensation method for a pH measurer. The method comprises the following steps of: preparing a composite glass electrode as a measuring electrode, using 0.05mol/L potassium hydrogen phthalate solution with the pH1 of 4.01 and the solution of 0.025mol/L monopotassium phosphate and 0.025mol/L disodium hydrogen phosphate with the pH2 of 9.18 to calibrate two spots, calculating a coefficient K by using a nemst equation, and calculating a constant E0 by using the solution of 0.025mol/L monopotassium phosphate and 0.025mol/L disodium hydrogen phosphate with the pH3 of 6.86; and saving the pH1, the pH2 and the pH3 of three types of standard buffer solution, corresponding electrodynamic force E1,E2 and E3, K and E0 in a storage module, reading the K and the E0 during measurement each time, and measuring a temperature value T', and calculating the pH value of the solution by using a formula. The method has the advantages that: the electrodynamic force E0 is eliminated, different pH measuring electrodes can be adapted, and the functions of automatically compensating the temperature in real time and the like are achieved.

The invention discloses a self-driven photoelectric detector based on a graphene electrode and a perovskite light absorption layer and a preparation method thereof. The method comprises the following steps: step 1, etching a conductive glass substrate after being cleaned and dried into separate two parts that respectively are a first conductive glass electrode and a second conductive glass electrode; step 2, preparing an electron-transporting layer on the conductive glass electrode; step 3, transferring a graphene thin film on the electron-transporting layer and the second conductive glass electrode to form the graphene electrode that connects the electron-transporting layer and the second conductive glass electrode; and step 4, coating the perovskite light absorption layer on the graphene electrode positioned on the electron-transporting layer to form the self-driven photoelectric detector. Photons are absorbed by the arranged perovskite light absorption layer to generate electrons and hole pairs; because the perovskite is a bipolar material, the effective transportation for the electrons and the holes is implemented; the electrons transported to graphene are transferred to the TiO<2> electron-transporting layer via the graphene due to a tunneling effect of the graphene and are collected by the conductive glass electrodes.

The invention provides a poly (3,4-ethylenedioxythiophene) nanowire thin film. The poly (3,4-ethylenedioxythiophene) nanowire thin film is prepared according to the following synthetic method that in a three-electrode electrolytic cell, a mixed solution of 3,4-ethylenedioxythiophene monomer, a supporting electrolyte and an electrolytic solvent serves as an electrolyte solution, a gold electrode, a platinum electrode and an indium tin oxide conductive glass electrode or a fluorine-doping tin oxide conductive glass electrode serves as a working electrode, the gold electrode or the platinum electrode serves as an auxiliary electrode, a silver/silver chloride electrode serves as a reference electrode, polymerization reaction is conducted through a cyclic voltammetry or a potentiostatic method at the room temperature, and thus the poly (3,4-ethylenedioxythiophene) nanowire thin film deposited on the working electrode is obtained, so that a finished product is obtained after post-processing leaching and drying are conducted. According to the poly (3,4-ethylenedioxythiophene) nanowire thin film, the preparation method is simple and convenient, the reaction condition is mild, the product purity is high, and the prepared polymer thin film has an electrochromic performance and can be used as an electrochromic material to be applied to an electrochromic device.

The invention discloses a detection method for chlorine ion content in lithium-ion battery electrolyte. A non-aqueous potentiometric titration method is adopted for detection. Non-aqueous silver nitrate standard solution is taken as titrant; a silver electrode is an indicating electrode and a glass electrode is a reference electrode; a detected sample is titrated to an end point by the non-aqueous silver nitrate standard solution; and the chlorine ion content in the sample can be obtained by calculation according to the size of the detected sample, the concentration of the silver nitrate standard solution and the titration volume. The method has the advantages of simplicity and rapidness in operation, low cost, low detection limit and high result precision.

The invention discloses a tangential driving double-difference butterfly-wing silicon microgyroscope and an application method thereof. The silicon microgyroscope is of a silicon-glass double-layer structure which is constituted by a silicon sensitive structure and a glass electrode plate, the silicon sensitive structure comprises an external framework, an internal coupling spring structure and two silicon sensitive subsidiary structures, each silicon sensitive subsidiary structure comprises four inertial mass blocks which are connected to a supporting beam through a cantilever beam, driving comb teeth are arranged on the inertial mass blocks, a driving electrode, a detecting electrode and an electrode welding disc are arranged on the glass electrode plate, and detecting capacitors of thetwo silicon sensitive subsidiary structures constitute a double-difference slab detecting capacitor. The application method comprises the step of additionally applying static electrostatic stiffness to a unilateral silicon sensitive structure to change a modal control method of the system modal frequency. By means of the tangential driving double-difference butterfly-wing silicon microgyroscope and the application method thereof, the limit of normal displacement on driving amplitude and capacitive gaps can be effectively removed, the driving Q value can be effectively increased, the working state of the gyroscope is improved, thus the sensitivity of the gyroscope is improved, the bandwidth of the gyroscope is increased, and the stability of the gyroscope is improved.

The invention discloses a photoelectrochemical adaptor sensor as well as a preparation method and application thereof. The photoelectrochemical adaptor sensor comprises a conductive glass electrode, wherein the reacting end surface of the conductive glass electrode is modified with a composite membrane consisting of phosphorus hybridization graphite phase carbon nitride nanosheets loading gold nanoparticles; and a specific adaptor probe is self-assembled on the surface of the membrane. The preparation method of the photoelectrochemical adaptor sensor comprises the following step: modifying thephosphorus hybridization graphite phase carbon nitride nanosheets loading the gold nanoparticles and the specific adaptor probe on the reacting end surface of the conductive glass electrode. The sensor disclosed by the invention has the advantages of high stability, long service life, high anti-jamming capability, wide detection range, low detection limit and the like. The preparation method of the photoelectrochemical adaptor sensor has the advantages of simple technology, convenient operation, safety, low cost, no pollution, high production efficiency and the like. The sensor disclosed by the invention can be widely applied to detecting pollutants (such as antibiotics) in mediums such as a water body and a living body and has the advantages of high utilization rate, wide application range, high application value and the like.

In order to provide a lead free and environmental friendly glass electrode, a glass electrode has a responsive glass membrane conjugated with a distal end portion of a stem glass tube. Neither lead nor a lead compound is included in the stem glass tube and one of an alkali metal oxide and an alkali earth metal oxide is provided so that a thermal expansion coefficient of the stem glass tube is within ±20% of that of the glass used for the responsive membrane.

The invention discloses a production method and an application of an electrode modified with gold nano-cage and myoglobin. The production method comprises the following steps: taking graphite powder and an ionic liquid HPPF6 according to a mass ratio of (1.5-2.5):1, placing the graphite powder, the ionic liquid and liquid paraffin in a mortar, carrying out uniform grinding to obtain a carbon paste, filling a glass electrode tube with the carbon pate, and inserting a copper wire as a lead wire to obtain a carbon ionic liquid electrode CILE; dispensing 6-10 [mu]L of a AuNCs solution on the surface of the CILE, and naturally drying the CILE in a dark place under room temperature conditions to obtain an AuNCs/CILE electrode; dispensing 6-10 [mu]L of a 10-20 mg mL<-1> Mb solution on the surfaceof the AuNCs/CILE electrode, and naturally drying the AuNCs/CILE electrode in a dark place at room temperature to obtain a Mb/AuNCs/CILE electrode; and dispensing 4-8 [mu]L of a 0.3-0.7% Nafion ethanol solution on the surface of the Mb/AuNCs/CILE electrode, and drying the Mb/AuNCs/CILE electrode in a dark place at room temperature to obtain the Nafion/Mb/AuNCs/CILE electrode. The modified electrode has a good electrocatalytic reduction effect on trichloroacetic acid, sodium nitrite and hydrogen peroxide, has the advantages of wide linear range, low detection limit and high sensitivity, and can be well applied to the detection of the content of above three substances in an object.

The invention relates to a pH automatic continuous checking device. The existing device has the disadvantages of manual cleaning and complex operation. The side wall of a checking slot of the invention is provided with a liquid inlet and a liquid outlet, and the bottom part is provided with an ultrasonic generator. A current stabilizing hood is arranged in the checking slot, and the side wall is provided with a liquid circulating hole. A checking electrode passes through a lid cover to extend into the current stabilizing hood. A liquid entering pipeline is communicated with the liquid inlet by a liquid inlet valve, a liquid outlet pipeline is communicated with a liquid outlet by a liquid outlet valve, and the liquid inlet end of the liquid inlet valve is connected with the liquid outlet end of the liquid outlet valve by a by-pass pipeline which is provided with a by-pass valve. The device of the invention uses ultrasonic waves for cleaning, no direct impact is generated on the fragile pH glass checking electrode, and the glass electrode can not be damaged. When the pH automatic continuous checking device is cleaned, the checking electrode is not required to be detached, and thus, the cleaning is convenient and simple; the by-pass pipeline is opened in the cleaning of the pH automatic continuous checking device, and the producing process can not be interrupted.

The present invention discloses a construction method and a detection method of a potassium ion nucleic acid aptamer photoelectrochemical sensor based on a diluted magnetic semiconductor. The construction method comprises: (1) washing a glass electrode; (2) preparing a Mn-doped dendritic zinc oxide nano-rod photoanode; (3) preparing a Mn-doped dendritic zinc oxide nano-rod photoanode film; (4) assembling a potassium ion nucleic acid aptamer on the Mn-doped dendritic zinc oxide nano-rod photoanode surface to obtain a potassium ion nucleic acid aptamer base photoelectrochemical sensor; and (5) fitting a quantitative relationship curve, and calculating the potassium ion content in a sample to be detected. According to the present invention, the Mn<2+>-doped dendritic zinc oxide diluted magnetic semiconductor nano-rod is electrochemically synthesized by using the one-step method so as to be adopted as the photoelectric beacon; and by fitting the quantitative relationship curve, the novel nucleic acid aptamer diluted magnetic semiconductor base photoelectrochemical sensor platform is constructed and is used for ultrasensitive detection of the potassium ions.

The invention discloses a poly-3,4-ethylenedioxythiophene nano mesh structure film as well as a preparation method and an application thereof. The poly-3,4-ethylenedioxythiophene is of a nano mesh structure. The poly-3,4-ethylenedioxythiophene film is specifically prepared by the following steps: by taking 3,4-ethylenedioxythiophene as a monomer in a three-electrode cell system, taking lithium perchlorate as supporting electrolyte, and taking acetonitrile as an electrolytic solvent, uniformly mixing to obtain electrolyte; and by taking an indium tin oxide conductive glass electrode as a working electrode, taking a platinum electrode as an auxiliary electrode, and taking a silver/silver chloride electrode as a reference electrode, carrying out an electrochemical polymerization reaction at aroom temperature by adopting cyclic voltammetry or a potentiostatic method, thereby obtaining a polymer film deposited on the working electrode, eluting, and drying, thereby obtaining the poly-3,4-ethylenedioxythiophene. The conductive polymer film prepared by the method disclosed by the invention has a special nano mesh structure. Compared with an ordinary plane structure, the conductive polymerfilm has excellent electrochromic property.

The invention discloses a device for measuring the ultralow liquid flow rate. The device comprises a liquid storage tank and a circulation pool, wherein the liquid storage tank and the circulation pool are connected through a pipeline to form a liquid circulation loop. A temperature sensor, a reference electrode and a pH glass electrode are placed in the liquid storage tank. A tungsten oxide electrode is placed in the circulation pool. An open-circuit voltage E1 detection unit is arranged between the tungsten oxide electrode and the reference electrode. An open-circuit voltage E2 detection unit is arranged between the reference electrode and the pH glass electrode. The device further comprises a processor used for calculating the ultralow flow rate of liquid according to E1, E2 and the temperature value T measured through the temperature sensor. The invention further discloses a method for measuring the ultralow liquid flow rate through the device. The device is simple in structure, low in cost and capable of saving energy, the method for measuring the ultralow liquid flow rate can be applied to small chips, used in various shapes of pipelines as well and even used in open channels.

The invention discloses a voltage-modulated periodic subwavelength metal grating filter and a preparation method thereof. The filter comprises two transparent conductive glass layers, periodic metal gratings, photoelectric crystals and an electric field generation device, wherein slits distributed in periodic arrays are formed in the periodic metal gratings and filled with the photoelectric crystals; the two transparent conductive glass layers fit the upper and lower surfaces of the periodic metal gratings; the photoelectric crystals are hermetically fixed in the slits of the metal gratings; the electric field generation device is used for generating uniform adjustable electric fields on the two transparent conductive glass layers to change the refractive index parameters of the photoelectric crystals. According to the filter, the refractive index properties of filling materials and the transmittance properties of the metal gratings can be changed by changing external voltages of upper and lower transparent conductive glass electrodes to achieve the purpose of voltage modulation of filter properties.

The invention discloses a cobalt-manganese hydrotalcite-supported nanometer gold catalyst and a preparation method thereof, and belongs to the technical field of an electro-catalyst. The catalyst comprises the chemical component, CoMn-LDHs/AuNPs, wherein AuNPs is gold nano particles with the size of 7.2nm-13.8nm, and CoMn-LDHs is cobalt-manganese hydrotalcite. The preparation method of the catalyst comprises the following steps: preparing cobalt-manganese hydrotalcite with a carbonate intercalation layer by a nucleation crystallization separation method; coating a metal indium-tin oxide (ITO) conductive glass electrode with dispersion liquid droplets to prepare a cobalt-manganese hydrotalcite-modified conductive glass electrode; carrying out electrochemical reduction on the cobalt-manganese hydrotalcite/ITO conductive glass work electrode to prepare the gold nano particles in a phosphate buffer solution containing tetrachloroauric acid. The prepared cobalt-manganese hydrotalcite-supported nanometer gold catalyst has the advantages of uniform gold nano particle distribution, high stability, and high electrocatalytic oxidation hydrogen peroxide sensitivity.

The invention discloses an in-situ biomimetic preparation method and application of a composite titanium dioxide nano material, and relates to the field of nanoscience, material science, electrochemical sensing and the like. The in-situ biomimetic preparation method is characterized in that the composite titanium dioxide nano material is prepared in situ on the surface of a glass electrode by taking supramolecular metallogel formed by gallotannic acid and transition metal ions as precursors. The supramolecular metallogel formed by the gallotannic acid has good load capacity, so that various nano materials can be compounded with titanium dioxide; and in-situ modification, on the surface of the glass electrode, of the composite titanium dioxide nano material has a wide application prospect in the fields such as electrochemical luminescence and photoelectrochemical sensors.

The invention relates to a PH meter and a calibration method thereof. The PH meter includes a casing, a control circuit, a calibration switch, an indication device, a glass electrode, a reference electrode and a reference solution, wherein at least two liquid tanks are arranged in the casing and filled with buffer solution; liquid outlets are formed at the bottoms of the liquid tanks; air inlets are formed at the tops of the liquid tanks; each liquid outlet is communicated with the glass electrode through a liquid guiding tube; and liquid outlet valves are installed at the liquid outlets or in the liquid guiding pipes; air inlet valves are installed at the air inlets; and the liquid outlet valves and the air inlet valves are electrically connected with the control circuit. The invention has the advantages that the integration degree is high, the operation is convenient, the measuring data is accurate, and the calibration measurement is integrated.

The invention discloses a rapid algae-liquid separation method for microalgae treatment wastewater. The method includes the steps of collecting wastewater discharged by a sewage treatment plant to be put indoors for standby application, processing CODCr of wastewater through the potassium dichromate method, processing TN through the potassium persulfate oxidation ultraviolet spectrophotometry, processing TP through the antimony and molybdenum spectrophotometry, processing ammonia nitrogen through the Nessler spectrophotometry, and adjusting the pH through the glass electrode method. The method can be conducted in a cultivation device with the controllable turbulence intensity, temperature and light can be conveniently controlled, the efficiency of microalgae for processing wastewater is improved, no flocculant needs to be added under the turbulence condition, flocculating constituent is formed according to the property changes of microalgae cell surfaces so that algae and liquid can be separated, turbulence energy consumption can be sufficiently utilized, energy consumption is lowered, efficiency cost is improved, the pH of a culture solution is increased during processing, pathogenic organisms in a culture medium can be restrained, the produced flocculating constituent has high sedimentation speed, the algae-liquid separation efficiency is improved, operation is easy and convenient, cultivation conditions are easy to control, and an experimental device for the method is simple in structure, small in size, light in weight, high in practicability and repeatability, simple in process, convenient to machine, capable of saving labor, materials and financial resources, flexible to operate and convenient to clean.

The invention relates to a novel magnetic resonance contrast medium having an electrochemical sensing function and a preparation method thereof. The preparation method provided by the invention realizes full integration of a normal temperature solid phase ball-milling method, a plasma technology and a coprecipitation method. The method comprises the steps of firstly, preparing nitrogen edge functionalized graphene having electrochemical activity at a certain ball-milling speed at normal temperature and under normal pressure without addition of any reagent; secondly, implementing carboxylation modification on the functionalized graphene material through the plasma technology; finally, modifying a magnetic nano material on the carboxyl functionalized graphene through the coprecipitation method. Analysis through a transmission electron microscope and an atomic force microscope discovers that the functionalized graphene material is of a lamellar structure which is about 1nm thick, and deposited magnetic nano particles uniformly cover the graphene sheet by particle size about 15nm. The novel magnetic resonance contrast medium having the electrochemical sensing function is prepared by modifying glucose oxidase on the composite nano material through an amidation method and spinning on an ITO (indium tin oxide) glass electrode.