34 results about "Oxidation-Reduction Activity" patented technology

The invention relates to an oxygen carrier solid, its preparation and its use in a method of combustion of a hydrocarbon feedstock by active mass chemical-looping oxidation-reduction, i.e. chemical-looping combustion (CLC). The solid, which is in the form of particles, comprises an oxidation-reduction active mass composed of metal oxide(s) dispersed in a ceramic matrix comprising at least at least one feldspar or feldspathoid with a melting point higher than 1500° C., such as celsian, and has, initially, a specific macroporous texture. The oxygen carrier solid is prepared from a precursor of the ceramic matrix, obtained from a macroporous zeolitic material with zeolite crystals of a specific size, and a precursor of the oxidation-reduction active mass.

The invention provides a self-assembly hybrid film with oxidation-reduction activity of rare earth heteropolymetalate and binuclear ruthenium (II) complex, and relates to a preparation method for the self-assembly film of the rare earth heteropolymetalate and the binuclear ruthenium (II) complex as well as evaluation of the electrocatalytic oxidation activity to nitrite. The film is prepared from the rare earth heteropolymetalate K15[Eu(BW11O39)2] and the binuclear ruthenium (II) complex [RuBPBH](ClO4)4 through an electrostatic layer-by-layer self-assembly method. Three-layer (EuBW / RuBPBH)3 film modified electrodes have remarkable electrocatalytic oxidation effect on the nitrite, catalytic peak current and the concentration of sodium nitrite are in a linear relationship within certain concentration range, and the self-assembly hybrid film has potential application prospects in chemical sensors.

The invention relates to the field of a lead-acid storage battery, and discloses a <pi>-type-conjugated oxidation reduction polymer modified lead storage battery and a preparation method therefor. Positive electrode lead paste of the battery comprises 98.5-99.5 parts of lead powder, 0.2-0.8 parts of additive and 0.3-0.7 parts of mixed polymer powder; and the mixed polymer powder is prepared from a <pi>-type-conjugated oxidation reduction polymer, a surface anti-oxidation functional group sulfonated arene polymer and single-wall carbon nanotubes. The active material of the lead storage battery comprises the surface-modified and anti-oxidation functional group conjugated oxidation reduction polymers, so that strong electronic storage capability and rapid electronic reaction speed are achieved; the polymers comprise available oxidation reduction nodes, so that relatively strong oxidation reduction activity is achieved; therefore, the lead storage battery has relatively high energy density, and the discharging time of the battery is obviously prolonged in a high-rate discharging condition of the battery; and meanwhile, the service life of the battery is prolonged.

The invention discloses a method for detecting endotoxin. The method includes a material with oxidation reduction activity is added in tachypleus amebocyte lysate, a sample to be tested is added in the tachypleus amebocyte lysate, the sample to be tested may comprise the endotoxin, an oxidation reduction potential corresponding to the material with the oxidation reduction activity is exerted on the tachypleus amebocyte lysate, size of current passing through the tachypleus amebocyte lysate is monitored in real time simultaneously, and concentration of the endotoxin in the sample to be tested is obtained. Logarithm linear relationship exists between the concentration of the endotoxin added in the tachypleus amebocyte lysate and a time dropping point of the current passing through the tachypleus amebocyte lysate. Viscosity change in a tachypleus amebocyte lysate solidification process is shown through an electrochemical process directly, interference of sample colors is avoided, detection of the endotoxin can be achieved rapidly and accurately, and the method for detecting the endotoxin can be widely applied to the field of drug quality control, medical equipment pyrogen monitoring and the like.

The invention provides a preparation method and application of an electrode of a composite material of an iron porphyrin chloride / methylene blue @metal-organic framework. Iron porphyrin chloride (FeTCPP) is encapsulated to a Zn metal-organic framework (MOF) by a one-pot method, a composite material of the metal-organic framework has negative charges in a solution, and cationic dye methylene blue (MB) with oxidation-reduction activity can be absorbed. The composite material is modified to the surface of a glass carbon electrode, and dopamine can be catalyzed and oxidized so that an electrical signal can be produced, sensitive detection for the dopamine is realized by an electrochemical method, the lowest detection limit can reach 0.48fM, and the detection range is wide. The composite material of the metal-organic framework disclosed by the invention is synthesized for the first time, and besides, the composite material of the metal-organic framework is also applied to the field of electrochemical sensing for the first time, the method is simple, the cost is low, and high electrochemical sensing sensitivity indicates that the composite material of the metal-organic framework functionalized by porphyrin and methylene blue has good application prospects in the field of electrochemical and biological sensing.

The present invention discloses a Pd / TiO2atCNT catalyst and a preparation method thereof. According to the catalyst, Pd nanoparticles are adopted as a component having catalytic activity, and a TiO2atCNT composite material is adopted as a carrier. The preparation method comprises the following steps: respectively carrying out a pretreatment on titanium dioxide and carbon nanotubes; adopting the pretreated titanium dioxide and the pretreated carbon nanotubes as raw materials; adopting a chemical method to carry out synthesis to obtain a TiO2atCNT composite material; dispersing the TiO2atCNT composite material in an aqueous solution of PdCl2; and adding a reducing agent sodium borohydride to uniformly load palladium nanoparticles on the TiO2atCNT composite carrier. The Pd / TiO2atCNT catalyst prepared by the method of the present invention has high and stable electrochemical oxidation reduction activity.

The invention belongs to the technical field of preparation of functional composite electrodes and discloses a bisphenol A electro-polymerized film functional carbon nanotube / cadmium sulfide composite electrode as well as a preparation method and application thereof. The bisphenol A electro-polymerized film functional carbon nanotube / cadmium sulfide composite electrode is prepared by taking a single-walled carbon nanotube / cadmium sulfide electrode as a photo-anode, a titanium electrode as a counter electrode and a saturated calomel electrode as a reference electrode, and electro-polymerizing bisphenol A on the carbon nanotube / cadmium sulfide composite electrode under visible radiation through applying a continuous differential pulse voltammetry. The preparation method has the advantages of simplicity and convenience for operation, high controllability, low cost, environment protection and the like, and the prepared electrode has good oxidation-reduction activity, cooperatively enhanced light sensitivity and photosensitive conductivity.