889 results about "Photoelectrochemistry" patented technology

The invention relates to an organic wastewater treatment film reactor utilizing solar energy photo-assisted electro-catalysis, which comprises a storage tank of water to be processed, a flow controllable constant flow pump, a photoelectric chemical reactor, a clear water storage tank and a solar battery component, wherein a photo anode and a cathode are correspondingly arranged in the reactor; the photo anode takes a porous metal membrane as a base body, and a TiO2 nano tube or a TiO2 mesoporous membrane is formed on the surface of a porous titanium membrane (net) by an electrochemical anisotropic etching technology; a porous channel film is used as the base body; a metal oxide coating electrode with high electrochemical catalytic activity and high electrical conductivity is prepared by a dipping film-forming method, simultaneously, by doping and modifying operations, the electrode material has photo catalytic activity and the reaction efficiency is improved. The reactor integrates electrochemistry, photocatalysis and film separation technologies; the three technologies are coupled to enhance a synergistic effect; the wastewater treatment efficiency can be improved; a solar component is adopted as a power supply; the clean solar energy is utilized to the maximal degree, and the organic wastewater treatment film reactor has social benefits of reducing environment load and economic benefits of reducing cost.

The invention relates to a making method and an application of a CdS sensitized TiO2 environmental estrogen photoelectrochemical sensor. The method uses TiO2 as an antigen capture substrate material, a CdS photoelectric active material is in situ generated on the surface of a Cd2<+> functional TiP nanomaterial maker modified electrode through a direct Na2S dropping technology, and CdS is irritated by an LED lamp of visible light wavelength to be converted to a photoelectric current signal. The substrate material TiO2 can be well matched with CdS energy band, so the photocurrent conversion signal of CdS is further improved, thereby the competitive photoelectrochemical immunosensor for ultra sensitive detection of estradiol, estriol, diethylstilbestrol, bisphenol A, nonylphenol, oestrone and other environmental pollutants is made.

A photoelectrode for producing hydrogen and oxygen by photoelectro-chemically decomposing water is characterized in that the photoelectrode is composed of a photocathode and a photoanode, wherein the photocathode and a photoanode are provide with quantum dots being assembled with assistance of a double-functional molecule. The invention achieves the establishment and the application of the photoelectrode for producing hydrogen and oxygen on the basis of semiconductors, quantum dots and catalysts. The photoelectrode is high in stability, is free of a sacrificial agent, is simple in operation, is good in repeatability, is strong in universality and is high in utilization rate on visible light. In addition, the catalyst is free of requirement of noble metals, is low in cost and is easy to obtain.

The invention provides a preparation method for a double-functional mark photo-electrochemical sensor and application and belongs to the technical fields of nano-functional materials, clinical analysis, bio-sensing and electrochemistry. A TiO2-CdSe semiconductor compound is prepared based on a ligand principle between TiO2 and carboxyl; a remarkably-enhanced photoelectric conversion effect of the prepared TiO2-CdSe semiconductor compound is displayed on a visible region; a photocurrent value is 10 times as much as that of a single TiO2 photocurrent value; the TiO2-CdSe semiconductor compound has large specific surface area and good biocompatibility and is used for marking a second antibody (Ab2) of CA125 so that a TiO2-CdSe-Ab2 hatched matter is prepared. The difference between the double-functional mark photo-electrochemical sensor and other electrochemical or photo-induced electrochemical sensors is as follows: the TiO2-CdSe semiconductor compound can be used for not only carrying out photoelectric conversion and but also generating Cd2<+>, so that an immunosensor taking the TiO2-CdSe semiconductor compound as a second antibody marker can adopt an electrochemical analysis technology and a photo-induced electrochemical analysis technology to rapidly, sensitively and accurately detect the CA125. The method has certain guiding significance and application value on early diagnosis of cancers.

The invention discloses a preparation method for a three-dimensional photoelectrochemical paper chip and a method for measuring six tumor markers in a sample through a photoelectrochemical sensor. A hydrophobic region and a hydrophilic region are formed on paper by adopting a wax printing technology; a corresponding reference electrode and working electrodes are printed on the paper through proper ink; a working region is functionalized for antigen recognition; the prepared paper chip is folded to form a three-electrode system; a buffering solution containing ascorbic acid is dropwise added into a reaction region; under the irradiation of an ultraviolet lamp, the high-sensitivity detection on an object to be measured is realized.

A zinc-based metal organic framework and method of making is described. The zinc-based metal organic framework is in the form of an interpenetrating diamondoid framework where each Zn²⁺ ion center is linked with four other Zn²⁺ ion centers in a distorted tetrahedral geometry. The linking occurs through diamine and dicarboxylic acid linkers. The zinc-based metal organic framework may be deposited on a transparent conducting film and used as a photoelectrode for photoelectrochemical water splitting.

The invention provides a preparation method for a graphite phase-like carbon nitride/tetracarboxylphenylporphyrin nano-composite material. The nano-composite material is obtained with a solid-phase ball milling method. The invention furthermore provides an application of the graphite phase-like carbon nitride/tetracarboxylphenylporphyrin nano-composite material to the photocatalysis. The preparation method is simple, low in cost and easy to operate, and can shorten the reaction time to a very great extent. The nano-composite material has relatively good photoelectrochemical property, relatively good photocatalytic performance and good sensitization property and stability, and plays an important role in the aspects of organic pollutant degradation and dye photocatalytic degradation.

The invention discloses a method for treating cyanide-containing wastewater through photoelectrochemistry, which comprises the following steps of: regulating the pH value of the cyanide-containing wastewater to be more than 10, adding NaCl, electrolyzing under the radiation of ultraviolet, and regulating the pH value of the effluent to be 7-9 to ensure that cyanides meet the standard. A device used for implementing the method comprises a reaction tank; the bottom on one side of the reaction tank is provided with a water inlet, and the bottom on the other side of the reaction tank is provided with a water outlet; anode plates and cathode plates are inserted in the reaction tank at intervals, all the anode plates are connected in series, and all cathode plates are connected in series; and an ultraviolet lamp is arranged between each anode plate and each cathode plate. The cyanides in water are effectively removed through functions such as electrochemical anode direct oxidation, photocatalytic oxidation, active chlorine oxidation, ultraviolet radiation of active chlorine to generate chlorine radicals and hydroxyl radicals and the like. Meanwhile, heavy metal ions in the cyanide-containing wastewater are deposited on cathodes in the electrochemical reaction process, and are removed and recycled; and organic matters in the cyanide-containing wastewater are effectively degraded and removed.

The invention relates to a method for preparing a copper indium gallium selenide film by photoelectrochemical deposition, which is to deposit a copper indium gallium selenide film on a substrate placed in an electrolyte by using a photoelectrochemical deposition method; the electrolyte is selected from aqueous solution, organic solution, ion Liquid or mixed solution, which contains at least one of copper, indium, gallium, and selenium ions; the photoelectrochemical deposition process parameters are: the working electrode potential is -6.0 ~ 1.5V (vs SCE); at least one single color The light is used as incident light, and the included angle between the incident direction of the incident light and the working electrode is 0-90°. Finally, heat treatment can be performed on the obtained film. The invention solves the problems of poor film morphology, difficulty in indium and gallium deposition, and slow film growth rate encountered in traditional electrodeposited copper indium gallium selenide films, and has the advantages of good film quality, fast growth rate, controllable composition and good shape etc., the preparation method is low in cost, easy to realize large-area deposition of copper indium gallium selenide thin film, and is conducive to its large-scale industrial promotion and application.

The invention discloses a novel functionalized UiO-66 system zirconium organic frame catalyst material, a preparation method thereof and application of the catalyst material in the aspect of hydrogen generation through visible light catalytic water splitting. The preparation method of the zirconium organic frame catalyst material comprises the steps of 1 preparing a ligand 2,5-dimethyl sulfide terephthalic acid and 2 preparing a zirconium organic frame catalyst material (UiO-66(Zr)-(SCH3)2). The preparation method is simple and stable; the obtained zirconium organic frame catalyst material is stable in structure, can be used for the photoelectrode material for hydrogen generation through photoelectrochemical water splitting, and the performance is better than that of reported metal organic frame materials for hydrogen generation through photoelectrochemical water splitting. The material can be used for visible light catalytic hydrogen production, is excellent in performance and promotes application in clean energy and environment sustainable development.

The invention provides a method for efficiently grinding and polishing GaN chips, namely the photoelectrochemistry mechanical polishing method for efficiently grinding the GaN chips. The method includes the steps that under the effects of illumination and an external electric field, the to-be-polished surfaces of the GaN chips are oxidized to form gallium oxide, the gallium oxide and hydroxyl ions in a polishing solution are combined to form gallium hydroxide passivation layers, and the gallium oxide and hydrogen ions in the polishing solution are combined to form gallium ions; and under the protection of the gallium hydroxide passivation layers and the polishing solution rich in gallium ion, illumination and oxidation on concave parts of the to-be-polished surfaces are effectively restrained, high convex parts of the to-be-polished surfaces are mechanically removed, and new GaN surfaces are exposed and continue to be selectively removed through illumination and oxidation. The illumination intensity, voltage values and pressure applied to an upper tray are regulated and controlled, the oxidation speed of the to-be-polished surfaces of the chips is matched with the mechanical removing speed, and therefore the surface flatness and polishing efficiency of the GaN chips are improved, and high-quality polished GaN chips are obtained.

The invention provides a photoelectrochemical biofuel cell based on quantum dot, titanium dioxide and enzyme, and a preparation method thereof. The photoelectrochemical biofuel cell comprises the following parts: an anode chamber containing an anode, a cathode chamber containing a cathode, a membrane material to separate the anode chamber and the cathode chamber, and an outer circuit. The anode and the cathode are formed by loading modifiers on basic materials; and the enzyme is immobilized on a quantum dot / titanium dioxide composite layer, and the quantum dot and titanium dioxide are connected through a coupling agent. The invention has following characteristics of high output performance, high utilization efficiency of incident light, cheap and easily available raw materials. In addition, nano platinum is employed as a catalyst to realize a maximum surface area and a maximum catalysis efficiency.

The invention provides an optical anode used for hydrogen production by photoelectrochemistry decomposition water and a preparation method thereof. The optical anode comprises: conductive glass (1); a sputtering layer (2) which is arranged on the conductive glass (1) and has bulges (3); and a Ni-Fe oxide film (4) arranged on the sputtering layer (2). The preparation method comprises the following steps: (a) sputtering coating the conductive glass (1), then sticking the silk screen onto the sputtering layer (2) and continuing for sputtering coating; and (b) immersing the conductive glass processed in step (a) into a dipping solution which contains nickel salt and iron salt for dip coating, then drying and heat processing the conductive glass. The optical anode prepared in the invention has higher photocatalytic activity and electrocatalytic activity, can save energy and improve the opto-electrical transformation efficiency of hydrogen production by photoelectrochemistry decomposition water.

The invention relates to a photoelectrochemical sensor, and preparation and application thereof. A preparation method for the photoelectrochemical sensor comprises the following steps: S1, pretreating ITO electro-conductive glass; S2, adding TiO2 nanoparticles onto the ITO electro-conductive glass drop by drop to prepare an ITO/TiO2 electrode; S3, soaking the electrode in a carbon quantum dot solution for 10 h so as to obtain an ITO/TiO2/CODs electrode; S4, adding chitosan onto the electrode drop by drop so as to obtain an ITO/TiO2/CODs/CS electrode; S5, adding a glutaraldehyde solution onto the electrode drop by drop; and S6, dropwise adding thrombin aptamer drops, carrying out a reaction at 4 DEG C under a wet condition for 10 to 15 h, continuing adding bovine serum albumin onto the electrode drop by drop after leaching and blow-drying, and carrying out leaching and blow-drying again. The prepared photoelectrochemical sensor can be used for detection of thrombin. According to the invention, the carbon quantum dots with a wide visible light absorption range, good luminosity and high-efficiency electron injection capability are used as a photosensitizer for titanium dioxide, so the obtained composite structure has good response to photoelectric current under visible light. The prepared photoelectrochemical sensor has the advantages of simple operation, low cost, environment friendliness, high sensitivity and good selectivity.

The invention discloses a preparation method of a photoelectrochemical estradiol sensor, and belongs to the technical field of novel nano functional materials and biosensors. The method comprises the steps that a novel two-dimensional flaky magnetic photosensitive nanomaterial FeCo-N@TiO2 is prepared firstly, and by means of the good biocompatibility, large specific surface area and ferromagnetism of the material, the material is loaded with an estradiol antibody; alkaline phosphatase is fixed by means of the crosslinking action of glutaraldehyde; when detection is conducted, the alkaline phosphatase can catalyze sodium L-ascorbyl-2-phosphate (APP) to achieve in-situ generation of L-ascorbic acid (AA) to provide electron donors for photoelectric detection, the influence of specific quantitative combination of the antibody and an antigen on electron transmission capability is utilized for enabling the photoelectric current intensity to be correspondingly decreased, and the unmarked photoelectrochemical biosensor which is low in cost, high in sensitivity, good in specificity, rapid in detection and easy to prepare is finally prepared for detecting estradiol.

The invention relates to a method for detecting mercury ions by nucleic acid aptamer based photoelectrochemistry. An On-Off type nucleic acid aptamer based photoelectrochemical sensor is adopted for detecting the mercury ions with different concentrations and is constructed based on quercetin copper sensitization perylene tetracarboxylic-oxidized graphene heterojunction. Based on double advantages of a quercetin copper compound as a photosensitizer and a reducing agent, the method can be used for double amplifying photoelectrical signals, and has the characteristics of being convenient, simple, super sensitive, economical, high in specificity and the like. The constructed On-Off type nucleic acid aptamer based photoelectrochemical sensor adopts current-time technology to detect the mercury ions with different concentrations in a 0.1 mol/L phosphate buffered solution at the offset electric potential of 0.2V and under optical radiation of more than 450 nm.

The invention discloses a thiamphenicol molecularly imprinted electrochemical sensor and a preparation method and application thereof. A porous graphene-molybdenum disulfide nano flower-shaped compound is prepared through a hydrothermal one-step method, and the compound is dropped on the surface of an L-type glassy carbon electrode; aminated multi-walled carbon nanotubes and porous Pt-Pd nanoparticles are dispersed so that the imprinting surface area of the electrode can be increased and stability of a modification interface can be enhanced, and accordingly a three-dimensional porous imprinting substrate is obtained; thiamphenicol serves as template molecules, 1,2-diaminobenzene serves as functional monomers, and an imprinted membrane is prepared through cyclic voltammetry; ascorbic acid serves as a photoelectric chemical probe, and the electrochemical sensor for detecting thiamphenicol is built. The sensor has good thiamphenicol responsiveness, the linear range of the sensor is 1.0*10<-9>-3.5*<-6> mol L<-1>, and the detection lower limit is 5.0*10<-9> mol L<-1>. The sensor can be used for detecting thiamphenicol in meat samples and feed samples.

The invention relates to a preparation method of a photoelectrochemical sensor for detecting dexamethasone based on in-situ generation of cadmium sulfide. The method specifically comprises the following steps: as carboxylated carbon nitride and bismuth sulfide are taken as substrate materials, and labeling a dexamethasone antibody by using titanium dioxide subjected to cadmium ion functionalization. Sodium sulfide is directly dropwise added to the electrode surface, a narrow band-gap cadmium sulfide semiconductor nanometer material with the high photoelectric conversion efficiency is generated in situ, and a photocurrent signal is generated under light source irradiation with visible wavelength. A porous titanium dioxide carrier and a cadmium sulfide energy band are well matched, so that the photoelectric conversion efficiency of the cadmium sulfide is improved, the high-sensitivity detection of dexamethasone is realized, and the detection limit is 2pg/mL.

The invention, which belongs to the nanometer material performance and application field, discloses a visible photoelectrochemical detector based on a one-dimensional silicon nanostructure array. The detector is characterized in that: the detection of visible lights is allowed by utilizing response characteristic of photoelectrochemistry of the one-dimensional silicon nanostructure array that has good light absorption performance. The manufacturing process of the detector and required equipment are relatively simple. And the detector has good controllability and high optical responsivity. The construction process of a detector comprises the following steps: (1), preparing a one-dimensional silicon nanostructure array by utilizing a metal-catalyzed anisotropy chemical etching method; (2), depositing a conducting layer on the back of the one-dimensional silicon nanostructure array by utilizing a magnetron sputtering technology or a vacuum evaporation technology and carrying out annealing process to form a photoelectrode of the one-dimensional silicon nanostructure array; (3), constructing a visible photoelectrochemical detector based on the photoelectrode of the one-dimensional silicon nanostructure array. According to the invention, the visible photoelectrochemical detector is constructed by utilizing the high response characteristic of photoelectrochemistry of the one-dimensional silicon nanostructure array, thereby expanding the application field of semiconductor nanometer materials.