209 results about "Palladium ion" patented technology

The invention discloses a preparation process of a palladium electrode ion polymer and metal composite, which is used for preparing a palladium metal electrode IPMC (Ion Polymer Metal Composite) by using immersion reduction plating and chemical plating methods in which an ion exchange membrane is used as a matrix material and [Pd (NH3)4] C12 is used as a main salt. The preparation process comprises the following four main steps of: (1) pretreatment of the matrix membrane: carrying out roughening, surface cleaning, foreign ion removal and full swelling on the matrix membrane; (2) immersion reduction plating including two processes, i.e., ion exchange and ion reduction: subjecting a pretreated Nafion membrane to repeated palladium ion immersion and exchange, and reducing the pretreated Nafion membrane with NaBH4 by adopting ultrasonic waves to form palladium metals on the surface and the internal surface of the ion exchange membrane; (3) chemical plating: wherein the thickening electrodes on the outer surface of a core material to compact internal surface electrodes by using an improved chemical plating method; and (4) postprocessing of the composite. The preparation process has a higher popularization value due to relatively improved efficiency, relatively lower cost and excellent actuation response.

The invention discloses a preparation method of a high-activity palladium-carbon catalyst. The preparation method comprises the following steps of: (1) treating active carbon by using a compound oxidizing agent mixed solution; (2) slowly adding a palladium-chloride solution into the treated active carbon to obtain a mixed solution, and carrying out ultrasonic dispersion on the mixed solution; (3) adding alkali metal hydroxide or carbonate into the mixed solution ultrasonically dispersed to precipitate palladium ions, then adding a reducing agent, washing and drying to obtain a solid catalyst; and (4) carrying out plasma treatment on the solid catalyst to obtain a finished palladium-carbon catalyst. The preparation method disclosed by the invention has the advantages that compared with the traditional nitric acid, the high-activity palladium-carbon catalyst is environment-friendly and low-pollution; due to utilization of ultrasonic treatment, the dispersion of the catalyst is more uniform; and final plasma treatment is carried out on the catalyst, so that the activity of the catalyst is further improved.

The invention relates to a near-infrared fluorescent probe compound. In a formula, X is C(CH3)2, O, S or Se, R1 and R2 are independently selected from C1-C18 alkyl or benzyl, R3 and R4 are H, SO3R6, CO2R7 or NCS, R5 is saturated or unsaturated straight-chain or branched-chain C1-C18 alkyl, hydroxy C1-C18 alkyl, hydroxy C1-C18 alkyl, amino C1-C18 alkyl, acyl, phenyl, naphthyl or benzyl and Y is an anion. The heptamethine cyanine probe compound I provided by the invention can be used for selectively detecting palladium ions and zero-valent palladium with the ppb-level concentration in environment and providing enhanced fluorescence signals and can be also used for analyzing the palladium in biological imaging and complex environments. A reducing agent used for detecting the zero-valent palladium is PEG which has better biocompatibility and lower toxicity as compared with the traditional reducing agent PPh3.

The invention relates to a method of the catalytic oxidation and purification of tail gas containing hydrocyanic acid, in particular to a method for purifying the tail gas containing hydrocyanic acid by using a chemical method. The tail gas containing hydrocyanic acid is enabled to react with a prepared mixed catalyst solution containing palladium and copper under the temperature of 4 to 100 DEG C in a absorption tower, and the tail gas containing hydrocyanic acid is blown into the absorption tower in a gas-liquid negative-direction contact way, part of the hydrocyanic acid contacts and reacts with the palladium ions to form insoluble palladium simple substance, and part of the hydrocyanic acid reacts with the copper ions to form insoluble phosphor copper, part of the hydrocyanic acid is oxidized into phosphoric acid; all the generated substances enter into the liquid phase, and the mixed catalyst solution which absorbs the hydrocyanic acid and the purified and qualified tail gas not containing the hydrocyanic acid are acquired, the mixed hydrocyanic acid catalyst solution is oxidized into a by-product of the phosphoric acid to be used as resources again, the problems of hydrocyanic acid pollution is effectively eliminated, and the method provided by the invention provides a practical purifying method for the calcium carbide furnace gas and yellow phosphorus exhaust gas used as monocarbide chemical raw materials.

The invention discloses a palladium-ion multi-channel response probe and a synthesis method and application thereof. A probe molecule is formed by connecting ferrocene serving as an electric signal response center with rhodamine B serving as an optical signal response center through an acyl hydrazone bridge. The response probe is characterized in that Pd<2+> ions in an aqueous phase can be detected in a high-selectivity mode through the means of ultraviolet light or fluorescence or color comparison or electrochemistry, the lowest detection limit is 5.06*10<-8> M, and the response probe can be applied to cell fluorescence imaging. The probe is the first probe which has the photoelectric dual activity and can achieve multi-channel detection of the Pd<2+> ions, can efficiently detect a trace amount of Pd<2+> ions in different environments and is diverse in detection means, good in selectivity and wide in application prospect.

The present application discloses a photocatalytic coating agent and its preparation method and coating method. The photocatalytic coating agent comprises: composed of the following proportions in parts by mass, 0.1 to 20 parts of nano photocatalyst, binder 0.01 to 2 parts, 0.01 to 3 parts of water-soluble titanium compound and 100 parts of deionized water. The photocatalytic coating agent also comprises 0.001 to 0.2 parts by mass of metal ions; the metal ions are selected from gold ions, silver ions, platinum ions, palladium ions, rhodium ions, iridium ions, copper ions, iron ions , cobalt ions, nickel ions, manganese ions, vanadium ions, chromium ions, tantalum ions, lanthanum ions, cerium ions or a mixture of any proportion. The present application provides a photocatalytic coating agent, which is non-toxic and environmentally friendly, simple and easy to obtain, has high transparency, stable dispersion and suspension, high photocatalytic performance, and is easy to be tightly fixed on various substrate materials.

The invention discloses a method of adsorbing and separating palladium with high-molecular-based pillararene. The method includes a step of mixing an adsorbent with a nitrate solution containing various metal ions, wherein the palladium ion is adsorbed and separated by the adsorbent. The adsorbent is prepared by supporting the compound represented as the structure formula (I) on a carrier, wherein 1 g of the adsorbent is mixed with 20-30 ml of the nitrate solution. The carrier is medium-polarity macroporous resin. Concentration of nitric acid in the nitrate solution is 0.4-8 M. The method of adsorbing and separating palladium with the high-molecular-based pillararene is free of addition of other organic compounds, has good selectivity, is high in separation speed, is easy to operate and is easy to promote.

The invention relates to a palladium ion probe, and the palladium ion probe has good water solubility and short metal ion response time, is free of coexisting ions to affect detection, is a good colorimetric or fluorescent probe, and can be used as the colorimetric or fluorescent probe for detecting metal palladium ions in an aqueous or organic solvent. The invention also relates to a method for preparing the palladium ion probe, the method is simple in operation, raw material cost is low and the product purity is high. The palladium ion probe as the colorimetric or fluorescent probe for detecting the palladium ions in water is short in palladium ion response time, can realize detection of the palladium ions in water, and has potential application value in the living cell fluorescence imaging detection.

This application discloses a neutral photocatalytic coating agent, a preparation method and a coating method thereof. The neutral photocatalytic coating agent comprises, by mass, 0.1-20 parts of a nanometer photocatalytic material, 0.01-2 parts of a binder, 0.01-3 parts of a water-soluble titanium compound, a pH value adjusting agent, and 100 parts of deionized water, wherein the pH value of the neutral photocatalytic coating agent can achieve 6-8 with the pH value adjusting agent, the neutral photocatalytic coating agent further contains 0.001-0.2 part by mass of meta ions, and the metal ions are one or a mixture comprising a plurality of materials selected from gold ions, silver ion, platinum ion, palladium ion, rhodium ion, iridium ion, copper ions, iron ions, cobalt ions, nickel ions, manganese ions, vanadium ions, chromium ions, tantalum ions, lanthanum ions and cerium ions according to any ratios. The neutral photocatalytic coating agent of the present invention is neutral, non-corrosive and non-toxic, and has characteristics of environment protection, simpleness, easy obtaining, high transparency, stable dispersing and suspending property, and has high photocatalytic performance.

The invention relates to a modified metal organic framework composite material, a preparation method and application, and belongs to the technical field of preparation of porous materials. The preparation method comprises the following steps: adding a metal organic framework composite material UiO-66-NH2 in N,N-dimethylformamide, then adding pyromellitic dianhydride, carrying out refluxing reaction for 15-24 h under the condition of 70-90 DEG C, after reaction is finished, taking out solid substances, washing the solid substances with a N,N-dimethylformamide solution, and then drying under vacuum after centrifugal separating to obtain the modified metal organic framework composite material marked as MOF-PMDA. The modified metal organic framework composite material can serve as an adsorbentwhich adsorbs palladium ions in the solution, the preparation method is simple and convenient to operate, synthesis is facilitated, and the modified metal organic framework composite material is easyto be separated from an aqueous solution, has high adsorptivity and can be recycled.

The invention discloses a method for recycling palladium from a palladium-contained waste catalyst. The method comprises following steps that firstly, waste pre-treatment, wherein composite liquid isadopted for eluting the palladium-contained waste catalyst, filtering is carried out, and palladium-contained filter residue is obtained; secondly, palladium formation through palladium oxide reduction, wherein a reducing agent and the palladium-contained filter residue are used for having a reaction, the palladium oxide in the waste residue is reduced into elementary substance palladium; thirdly,acid soluble operation to obtain palladium ions, wherein organic acid haves a reaction with the elementary substance palladium, and an acid solution system existing in a palladium ion state is obtained; fourthly, replacement to obtain palladium, wherein a metal replacement method is adopted to carry out replacement on the palladium ions in the acid solution system, and sponge palladium is obtained; fifthly, palladium refining, wherein hydrogen is further used for reducing the metal palladium, and high-purity metal palladium is obtained. The organic composite liquid is used for eluting the palladium-contained waste catalyst, the problems of high energy consumption and environment pollution in the prior art are solved, the process flow is short, and the problems that in the current palladium recycling technology, energy consumption is high, and the recycling rate is low are solved.

A substrate includes a non-conductive portion to be electroless-plated of a substrate, on the surface of which fine metal catalyst particles composed of silver nuclei and palladium nuclei each having an average particle size of 1 nm or less adhere at a high nuclei density of 2000 nuclei/mum2 or more. The metal catalyst particles are produced by sensitizing the non-conductive portion of the substrate by dipping the substrate in a sensitizing solution containing bivalent tin ions, activating the non-conductive portion of the substrate by dipping the substrate in a first activator containing silver ions, and activating the non-conductive portion of the substrate by dipping the substrate in a second activator containing palladium ions.

The invention discloses a carbon nano tube film load cuprum and palladium bimetallic catalyst, a preparation method and an application. The catalyst takes cuprum and palladium as catalytic activity ingredients, and carbon nano tube film modified titanium plate as a substrate. The preparation method comprises the steps of pretreating the titanium plate and a carbon nano tube respectively, taking the treated titanium plate as an anode, taking a dispersed carbon nano tube suspension as deposition liquid, depositing the carbon nano tube on the titanium plate uniformly by the electrophoresis action to form a dense carbon nano tube film, taking the dried carbon nano tube film modified titanium plate as the substrate, placing the substrate in a sodium chloride electroplating solution containing cupric ions, palladium ions and polyvinylpyrrolidone, synchronously depositing the cuprum and the palladium by an electrochemical reduction method, and obtaining the titanium-based carbon nano tube film load cuprum and palladium bimetallic catalyst. The catalyst has high and stable electrochemical activity and electro-catalytic properties, and can serve as a working electrode to degrade organic dye in a water body and reduce inorganic negative ions such as nitrate, bromate and chromate.

The invention provides a chemical palladium plating solution, and a preparation method, an application method and applications thereof. The chemical palladium plating solution comprises palladium ions(0.5-5 g/L) and a reducing agent (1-20 g/L); wherein the palladium ions are provided by palladium tetramminosulfate. Palladium tetramminosulfate in provided chemical palladium plating solution is a solid soluble palladium salt; palladium exists in a tetra-amine palladium complex form; at a room temperature, palladium can be stably stored in a solid form, the storage and transportation are easy; moreover, compared with palladium sulfate or other palladium salts, palladium tetramminosulfate is very stable, and the problem of easy precipitation of palladium is solved.

The invention discloses a method for extracting and separating palladium ions through a pillar arene ramification. A dichloromethane solution or a chloroform solution containing an extraction agent serves as an organic phase, the concentration of the extraction agent in the organic phase ranges from 0.01 M to 0.02 M, and after the organic phase and a nitric acid aqueous solution containing various metal ions are mixed, the mixture is vibrated, wherein the vibration temperature is 25+/-1 DEG C, and the vibration time ranges from 85 h to 100 h. The concentration of the various metal ions in the nitric acid aqueous solution ranges from 5*10-4 M to 1*10-2 M. The concentration of HNO3 in the nitric acid aqueous solution ranges from 0.4 M to 9 M. According to the method for extracting and separating palladium ions through the pillar arene ramification, the efficient separation of the palladium element can be conducted, the process is simple, and operation is easy.

The invention discloses a palladium ion fluorescent probe, and a preparation method and applications thereof. According to the palladium ion fluorescent probe, allyl formate is taken as a response group, and bathochromic shift in an absorption spectrum and bathochromic shift in a fluorescence excitation spectrum are both caused after adding of palladium ions. The palladium ion fluorescent probe is capable of detecting palladium ions with high sensitivity and selectivity, and quantitative determination on palladium ions can be realized via ratio method. The palladium ion ratio fluorescent probe can be used for rapid high-sensitivity specificity detection on low concentration palladium ions; the synthetic method is simple; and industrialized batch production can be realized.

The invention discloses an ultralow-concentration ion palladium activation solution and a process for chemical nickel-plating on a copper surface. The ultralow-concentration ion palladium activation solution is characterized in that a plating solution comprises the following raw materials: 2-10ppm (palladium ion concentration) of a palladium salt, 0.5-10ml/L of sulfuric acid or hydrochloric acid, 0.01-4g/L of a surfactant, 0.1-10g/L of an accelerant and 1-50mg/L of a stabilizing agent. By using the accelerant, the concentration of palladium ions used by the activation solution can be significantly reduced under the condition that the chemical nickel-plating effect is not influenced, and a construction process is convenient and easy to implement.

The invention relates to a rotatable magnetic nano chain supported palladium nanoparticle catalyst and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out external magnetic field induced assembling so as to obtain a one-dimensional core-shell type Fe3O4@(DVB-MAA) nano chain; secondly, carrying out silica coating on the Fe3O4@(DVB-MAA) nano chain by using a simple sol-gel method, and preparing a bell-shaped Fe3O4@Void@mSiO2 magnetic nano chain through firing; and finally carrying out amino modification on the surface of the bell-shaped Fe3O4@Void@mSiO2 magnetic nano chain, supporting palladium ions on the magnetic nano chain under an intensive complexing function of amino and palladium ions (Pd<2+>), and reducing the supported palladiumions, thereby obtaining a one-dimensional magnetic hollow nano chain supported palladium nanoparticle catalyst. By adopting the catalyst, the problem that a noble metal, namely palladium nanoparticles, is hard to separate and liable to aggregate when being used as a catalyst, can be effectively solved.

The invention discloses a surface processing method of a PCB (printed circuit board), mainly comprising the following steps: electroplating nickel, and evenly coating a layer of metal nickel on the PCB; electroplating a nickel palladium alloy, and coating a layer of nickel palladium alloys on the nickel surface of the PCB, wherein as for the liquid medicine, the temperature of the liquid medicineis 60-64 DEG C, the concentration of palladium ions is 6-9 g/L, the concentration of nickel ions is 5-8 g/L, and the PH value is 4.6-5.8; and electroplating aurum, coating an aurum layer with the thickness of 0.1 mu m on the nickel palladium alloy surface of the PCB. A step of electroplating the nickel palladium alloys is added between the step of electroplating nickel and the step of electroplating aurum, so that the circuit board is sequentially coated with a nickel layer, a nickel palladium alloy layer and an aurum layer. As the nickel palladium alloy has excellent performance, and the nickel palladium alloy is used as the intermediate layer between the nickel and the aurum, the usage amount of aurum is reduced. The method provided the invention can reduce the cost under the condition of not affecting aurum wiring performance and wearing performance.

The invention belongs to the technical field of natural product preparation and especially relates to a method for adsorbing and recovering a precious metal palladium by a persimmon tannin-containing metal adsorbent. The method can be widely used for adsorbing and recovering a palladium element in a secondary resource and has the advantages of low cost, large adsorption capacity, good environmental benefits and convenient operation. The method is characterized by comprising the following steps of 1, weighing a certain amount of a persimmon tannin-containing adsorbent, and adding the weighed persimmon tannin-containing adsorbent into a triangular flask, 2, adding a palladium ion-containing solution having a pH value in an appropriate range into the triangular flask, wherein the volume of the used palladium ion-containing solution is less than or equal to half of the volume of the triangular flask, 3, sealing an opening of the triangular flask by a sealing film, putting the sealed triangular flask into a shaking table, and carrying out shaking-table shaking adsorption at a shaking-table rotation rate of 100 to 200rpm at a temperature of 25 to 50 DEG C for 12 to 24h or carrying out chromatographic column adsorption at a chromatographic column mobile phase flow rate of 6 to 10mL/h for 12 to 24h, and 4, carrying out filtration so that the palladium ions in the palladium ion-containing solution are adsorbed by the persimmon tannin-containing adsorbent. The method also can be used for adsorbing and recovering a precious metal palladium by a chromatographic column.

The invention discloses an in situ supported catalyst and a preparation method thereof. The catalyst is used for catalyzing Suzuki reaction. The in site supported catalyst comprises zinc oxide, 2-methylimidazole and palladium ion and is prepared through a mechanochemical method. The catalyst is simple to prepare, can be used for catalyzing bromobenzene (and derivatives thereof) and borophenylic acid (and derivatives thereof) with high activity and high selectivity to perform Suzuki reaction, can be separated from the product simply, and can be reused for times.

The invention discloses a hydrogenation and deoxidization method for palladium ion type catalytic resin, which comprises dissolving palladium chloride in distilled water, agitating homogeneously, passing palladium chloride solution through contacting tower containing strong acid type cationic ion-exchange resin, rinsing with water, drying at room temperature, letting hydrogen gas into resin for reduction, letting water with dissolved oxygen from the top of the packed column, sprinkling onto the whole cross-section homogeneously through a liquid distribution apparatus, lifting the water with dissolved hydrogen gas with a pump, injecting into a contacting tower incorporating palladium ion type catalytic resin, and passing water through palladium ion type catalytic resin.

The invention discloses a functionalized mesoporous molecular sieve and application of the functionalized mesoporous molecular sieve in recovering noble metal. The functionalized mesoporous molecular sieve is a silicon mesoporous molecular sieve grafted with amido or sulfydryl. The application of the functionalized mesoporous molecular sieve in recovering the noble metal comprises the following steps: processing a waste electronic circuit board to obtain metal dissolving solution; regulating the pH of the metal dissolving solution to about 1, and selectively absorbing palladium ions and/or platinum ions in the metal dissolving solution by using the functionalized mesoporous molecular sieve; regulating the pH of the metal dissolving solution to about 2.5, and selectively absorbing aurum ions in the metal dissolving solution by using the functionalized mesoporous molecular sieve; and respectively washing the molecular sieve carried with palladium ions and/or molecular sieve carried with platinum ions and the molecular sieve carried with aurum ions, thereby enabling the noble metal to enter the solution through desorption and simultaneously reactivating the molecular sieve. The method for recovering the noble metal has the advantages of simple process and high noble metal absorption rate, and is environment-friendly.

The invention discloses a method for preparing a palladium acetate compound, which comprises the following steps of: dissolving and reducing palladium sponge into floating active sponge palladium black; refluxing and completely reacting the active sponge palladium black with glacial acetic acid on the premise of not adding any aid; and concentrating, crystallizing and drying to prepare red-brown palladium acetate crystals. The key technology of the method is that: a foaming agent is added into a chloropalladite reduction system for reducing palladium ions into the floating active sponge palladium black, and the problem that the reaction between the active sponge palladium black and the glacial acetic acid is slow and incomplete is effectively solved on the premise of not adding any aid into a reaction system of the active sponge palladium black and the glacial acetic acid. The method for preparing the palladium acetate compound has the advantages of short reaction time, easy control, high stability, repeated use of glacial acetic acid, high product purity, yield of over 99 percent, and capacity of overcoming the defect of using nitric acid as an aid in the prior art.

The invention relates to a method for forming a metal pattern on the surface of an insulator, which comprises the following steps of: using a laser beam to irradiate a local surface on an insulator material, on which the metal pattern is to be formed; soaking the insulator subjected to laser irradiation processing into cleaning liquid medicine to clean the insulator and removing attachments which are covered on the surface of holes and are formed due to gasification; soaking the insulator into liquid medicine containing palladium ions so as to fill ensure palladium particles into the holes which are fine and are densely distributed on the surface of the insulator; and placing the insulator into chemical copper or nickel plated liquid medicine, so that the chemical reaction is caused by positive valence copper or nickel ions and other negative valence ions on the surfaces of the palladium particles and the positive valence copper or nickel ions and the other negative valence ions are further precipitated on the surfaces of the palladium particles to form a coating. Compared with the prior art, the method disclosed by the invention has the advantages that only the local surface of a common insulator needs to be plated with the metal pattern instead of all the surface and the method does not depend on any special material containing particles, and thus, the method has simple process and lower cost.