42results about How to "Potential window width" patented technology

The invention belongs to the field of automobile surface washing, and relates to an anhydrous car washing liquid. The washing liquid is mainly composed of the following raw materials in parts by weight: 10 to 35 parts of paint film protective agent, 3 to 15 parts of luster-enhancing / lubricating conditioning agent, 2 to 18 parts of ionic liquid, 5 to 32 parts of surfactant, 4 to 16 parts of auxiliary surfactant, 0.1 to 5 parts of scratch filler, 0 to 10 parts of deionized water, and 0.01 to 0.3 part of essence. The selected ionic liquid and surfactant can generate a synergetic effect, under the help of a co-emulsifier, a thermally-stable micro-emulsion system can be formed, the system is stable, the dirt removing performance is greatly improved, and the organic attachment such as bird manure can be easily removed by the provided washing liquid.

The invention belongs to a preparation method of a chemically modified carbon paste bismuth film electrode. The method is to uniformly mix and grind carbon powder, modifier and hydrophobic organic solvent to form a carbon paste, then put it into an electrode shell plugged with a copper screw rod of comparable size, and compact it to form a carbon paste electrode; wherein, the modifier is artificial Zeolite, hydrophobic organic solvent is methyl silicone oil or paraffin oil. In the sample solution containing bismuth ions, the potential is applied by differential pulse voltammetry to carry out constant potential deposition, and the chemically modified carbon paste bismuth film electrode can be obtained; or the carbon paste electrode is placed in the sample test solution added with bismuth ions, through Differential pulse voltammetry applied potential for potentiostatic deposition for in situ bismuth coating and detection of heavy metal ions. By applying the invention, the heavy metal ion in the water sample can be detected conveniently, quickly and sensitively.

The invention provides a nano-diamond-graphene composite film implanted with sulfur ions. The invention uses hot wire chemical vapor deposition to prepare a nano-diamond-graphene composite film on a single crystal silicon substrate, and performs sulfur ion injection on the prepared composite film. Injection, and vacuum annealing is performed on the implanted composite film to obtain the SNCD‑G composite film. This composite film has excellent electrochemical activity, extremely low background current and wide potential window, which is very conducive to the application in high precision in the field of trace detection.

The invention discloses a boron-doped diamond electrode with high conductivity, long service life and high specific surface area. The boron-doped diamond electrode uses an etched substrate as an electrode base; or on the surface of an etched substrate After the transition layer is set as the electrode base, a boron-doped diamond layer is set on the surface of the electrode base. The boron-doped diamond layer includes a boron-doped diamond bottom layer with different boron content, a boron-doped diamond middle layer, and a boron-doped diamond layer. Top layer; wherein, the boron-doped diamond bottom layer in contact with the substrate is used as a conductive layer, the boron-doped diamond middle layer is used as a corrosion-resistant layer, the boron-doped diamond top layer is used as a strong electrocatalytic active layer, and the substrate is a metal phase and A composite material composed of ceramic phases, the metal phase is continuously distributed in the composite material; the boron-doped diamond electrode obtained in the present invention has high electrical conductivity, low residual stress, long life, and high specific surface area, and when it is applied to degrade wastewater, the degradation efficiency is greatly improved promote.

The invention discloses a supercapacitor based on silver nanoparticles loaded on a porous cobalt strontium lanthanum oxide substrate. The supercapacitor comprises leads, a charge collector, a positive electrode material, a diaphragm and a negative electrode material; at least one of the positive electrode material and the negative electrode material is an electrode material formed by the silver nanoparticles loaded on the porous cobalt strontium lanthanum oxide substrate; the preparation comprises the steps of preparing a cobalt strontium lanthanum oxide ceramic powder material firstly by adopting a ceramic method; adding the prepared cobalt strontium lanthanum oxide ceramic powder material into a ball milling tank, and then adding a pore forming agent and a solvent, and performing ball milling and drying, and carrying out calcining on a formed blank at a temperature of 900-1,100 DEG C for 4-15h to prepare the porous cobalt strontium lanthanum oxide substrate; and impregnating an AgNO<3> solution, and loading the silver nanoparticles, and performing vacuum drying and then calcining. The supercapacitor disclosed by the invention has the characteristics of high specific capacity, wide potential window, high energy density, high stability and the like, as well as the advantages of high safety, low cost, environment protection and no pollution, and the like.

The invention belongs to the field of electrochemistry, and relates to a catalyst for electrochemical reduction of CO2 based on boron-nitrogen co-doped nano-diamond, in which the dopant nitrogen content is 0-10 at%, the boron content is 0-5 at%, Size 10 ~ 500nm. The boron-nitrogen co-doped nano-diamond of the present invention is prepared by hot-wire chemical vapor deposition method under the conditions of tungsten wire temperature 1900-2200°C and pressure 200-2000Pa for 10-20h, wherein the volume fractions of N2 and CH4 are respectively 2.5-25 %, 0.5-20%. The electrochemical reduction CO2 catalyst has the advantages of high electrocatalytic activity, high C2 product selectivity and good material stability for the electrochemical reduction CO2 reaction. It is a non-metallic electrocatalytic material with excellent performance and low price, which can be applied to CO2 The field of resource utilization.

The invention relates to an electrocatalytic oxidation electrode for sewage treatment and a preparation method thereof. It is a boron-doped diamond film / porous carbon / porous carbon film with titanium-based boron-doped diamond film as the base, porous carbon as the transition layer, and lead oxide as the active coating. Lead dioxide ternary composite electrode. The present invention also provides a method for preparing the above-mentioned electrocatalytic oxidation electrode. The boron-doped diamond film material and the porous carbon transition layer are prepared by vapor phase chemical deposition, and a lead dioxide coating is deposited on the above-mentioned material. The boron-doped diamond film prepared by this method is The diamond film / porous carbon / lead dioxide ternary composite electrode has high oxidation efficiency for organic pollutants, overcomes the problems of easy oxidation and peeling off of the titanium substrate and short service life of the traditional lead dioxide electrode, and has good chemical and mechanical properties. Stability, can be used in the electrochemical treatment of refractory sewage.