23 results about "Cadmium nitrate" patented technology

The invention relates to a preparation method and application of a CoO-CdO composite material micro-nano motor, and belongs to the technical field of metal oxide heterostructure composite materials. The preparation method specifically comprises the following steps: adding potassium sulfate into an aqueous solution of cobalt nitrate hexahydrate, urea and cadmium nitrate tetrahydrate, uniformly stirring in an oil bath, transferring the mixed solution into a reaction kettle, carrying out constant-temperature reaction, washing, drying and calcining to obtain the product micromotor. The special lamellar spherical micromotor is prepared through a hydrothermal method, the micromotor is high in power and rapid in driving under low-concentration hydrogen peroxide, the driving speed can reach about 330 [mu] m / s, the micromotor can efficiently degrade tetracycline, and the micromotor is wide in activity range and high in efficiency. High-power bubble driving has a wide application prospect in the aspect of efficiently degrading organic pollutants in a water body.

The application discloses a cadmium-based metal-organic framework material and a preparation method and application thereof. 60 H 34 Cd2N 12 O8S, and the preparation method comprises the following steps: uniformly mixing cadmium nitrate tetrahydrate, 2,6-bis(benzimidazole-1-yl)pyridine, 5,5 ' -benzothiadiazole-4,7-diisophthalic acid, N,N'-dimethylformamide, methanol, ultrapure water and nitric acid according to a predetermined proportion; the mixture is warmed to 115-125 DEG C and reacted for 70-75 hours to obtain yellow flaky crystals; the collected crystals are washed with ethanol and dried in air. The cadmium-based metal-organic framework material can be applied to the preparation of a fluorescent probe or a fluorescent sensor for detecting anthrax biomarker DPA, realizes selective recognition of anthrax biomarker DPA through fluorescence blue shift, and the detection limit is 1.5 mu M.

The application discloses a kind of chlorophyll sensitized modified cadmium sulfide nanomaterials rapid preparation method, belong to photochemical energy conversion, photocatalytic degradation field.The present application is to solve the technical problems of high-quality preparation of natural organic dye sensitized semiconductor composite material and how to effectively improve photochemical energy conversion efficiency.The method of the present application: one, cadmium nitrate tetrahydrate and thioacetamide are dissolved in triethylene glycol, after being stirred sufficiently, the solution is transferred to the reaction kettle with polytetrafluoroethylene lining and heated, after being cooled to room temperature, it is washed multiple times and dried in vacuum drying oven, to obtain cadmium sulfide (CdS) powder;Two, fresh spinach leaves are added to ethanol and ground, then soaked in anhydrous ethanol, to obtain chlorophyll solution by absorbing supernatant;Three, cadmium sulfide nanomaterials obtained in step one and chlorophyll solution and anhydrous ethanol obtained in step two are ground to dryness under infrared lamp irradiation, to obtain chlorophyll sensitized modified cadmium sulfide (Chl@CdS) nanomaterials.

The application provides a double-core-shell light-limited catalyst and a preparation method and application thereof. The light-limited catalyst with the specific structure is prepared by using the principle of refraction and reflection of light transmission in a non-uniform refractive index medium, adopting a double-core-shell structure to utilize light sources multiple times to realize a light-limited function, and thereby enhancing the light absorption effect of the catalyst. The preparation method is as follows: (1) an inner core: adding yttrium chloride hexahydrate, ytterbium chloride hexahydrate, thulium chloride hexahydrate, ethylenediaminetetraacetic acid and sodium fluoride into deionized water to obtain a NaYF4:Yb / Tm inner core by a hydrothermal method, (2) a core-shell structure: dispersing the inner core in the step (1) in an anhydrous ethanol solution, adding ammonia water and tetraethyl orthosilicate, and obtaining a core-shell structure of the inner core wrapped by silicon dioxide after hydrolysis, and (3) a double-core-shell structure: dispersing the core-shell structure in the step (2) in deionized water, adding trisodium citrate, cadmium nitrate tetrahydrate, ammonia water and thiourea, and preparing the double-core-shell light-limited catalyst by water bath heating.

The invention discloses a cadmium-based metal-organic framework material as well as a preparation method and application thereof. The chemical formula of the cadmium-based metal-organic framework material disclosed by the invention is C60H34Cd2N12O8S, and the preparation method of the cadmium-based metal-organic framework material comprises the following steps: uniformly mixing cadmium nitrate tetrahydrate, 2, 6-bis (benzimidazole-1-yl) pyridine, 5, 5 '-benzothiadiazole-4, 7-diisophthalic acid, N, N'-dimethylformamide, methanol, ultrapure water and nitric acid according to a preset proportion; heating the mixture to 115-125 DEG C, and reacting for 70-75 hours to obtain a yellow flaky crystal; and washing the collected crystals with ethanol, and drying in the air. The cadmium-based metal-organic framework material disclosed by the invention can be applied to manufacturing a fluorescent probe or a fluorescent sensor for detecting the anthrax biomarker DPA, selective recognition of the anthrax biomarker DPA is realized through fluorescent blue shift, and the detection limit is 1.5 mu M.

The application belongs to the technical field of environmental material preparation, and discloses a photosensitive activated type Zn 0.8 Cd 0.2 S / PDI composite photocatalyst, a preparation method and application thereof. The method comprises the following steps: firstly, preparing PDI; adding CTAB into deionized water, stirring until dissolved, and then adding hexamethylenetetramine, monohydrate citric acid, cadmium nitrate tetrahydrate, zinc nitrate hexahydrate, PDI and thioacetamide into the deionized water in sequence, and condensing and refluxing; after stirring for a period of time, cooling to room temperature; and then repeatedly washing the product after reaction with NaCl solution and deionized water, and vacuum drying Zn 0.8 Cd 0.2 S / PDI composite photocatalyst. The application will not cause resource waste and additional pollution, is simple to operate, is a kind of green composite material, realizes complete degradation of decabromodiphenyl ether in water within 2 minutes under focused natural sunlight, and can control the purpose of treating aromatic halides in sewage.

This invention relates to the field of photocatalysis, specifically to a Cd-MOF material, its preparation method, and its applications. The preparation method involves dissolving 2,6-naphthalenedicarboxylic acid, the organic ligand 2,5-bis(pyridin-4-yl)thiazo[5,4-d]thiazole, and cadmium nitrate tetrahydrate in N,N-dimethylformamide, stirring until homogeneous, sealing in a glass bottle, and carrying out a solvothermal reaction to obtain the Cd-MOF material. The Cd-MOF material can efficiently photocatalyze the degradation of dyes in water, exhibiting high catalytic activity as a catalyst. Furthermore, the prepared Cd-MOF is used as a catalyst for photocatalytic amine oxidative coupling to prepare imines. Using air as an oxygen source, the light utilization rate is high, the reaction conditions are mild, and a high yield of the product is obtained. The Cd-MOF photocatalyst has a short reaction time, high catalytic activity, good stability, and is recyclable.

This invention discloses an amorphous metal-organic framework microsphere, its preparation method, and its applications. Organic molecules H4TTBE and cadmium nitrate are uniformly dissolved in an organic solvent, water is added, and the mixture is sonicated to obtain a solution. This solution is then heated in an oven, cooled, and washed to obtain amorphous metal-organic framework microspheres. The microspheres possess ideal circular boundaries and smooth surfaces. Their PL emission peaks consist of a series of sharp characteristic peaks, exhibiting a typical whispering-gallery mode. The microspheres exhibit size dependence, with different sizes showing different modal spacings. They also possess switchable whispering-gallery modes, which can be used to design covert photonic barcodes as anti-counterfeiting labels.

The application discloses a preparation method and product of 1-octene-3-ol gas-sensitive material and application thereof, and improves the response of ternary metal oxide to 1-octene-3-ol through rare earth element doping. The preparation method comprises the following steps: taking a mixed solution of isopropyl alcohol and glycerol as a solvent, taking cadmium nitrate tetrahydrate and hydrated indium nitrate as cadmium sources and indium sources, and taking appropriate nitrate erbia hexahydrate to realize rare earth element Er doping; after water bath assisted dissolution, the mixed solution is transferred into a stainless steel high-pressure reaction kettle for sealing reaction; after the reaction is completed, the precursor material is obtained through washing and drying, and the gas-sensitive material is obtained through calcination. The gas-sensitive material prepared by the application has good response sensitivity to 1-octene-3-ol, and the electron mobility is further improved through rare earth element doping, so that the detection accuracy of the material under low VOC concentration is improved. The preparation method is simple and practical, and can be used for monitoring the aging phenomenon in the storage process of rice, so as to provide protection for food safety and fair trade of grain.

The application discloses a pressurized water reactor chemical shutdown system and method using cadmium nitrate as a shutdown solution, which comprises a chemical shutdown system and a main loop; the chemical shutdown system adopts an active or passive mode and mainly comprises a concentrated cadmium nitrate storage tank, a high-pressure injection pump and an injection pipeline; after receiving a poison emergency injection signal or a cold shutdown maintenance signal, the injection pipeline inlet valve and the outlet valve are opened, the concentrated cadmium nitrate solution is driven in an active or passive mode, is injected from the concentrated cadmium nitrate storage tank to a nuclear reactor cold end main pipeline through the injection pipeline, is further stirred in a lower chamber of a pressure vessel, and is then distributed in the pressure vessel through flow redistribution. At the same temperature, cadmium nitrate has a greater solubility and a neutron absorption cross section than traditional neutron poison boric acid; the application enhances the reliability of reactor chemical shutdown under accident conditions, improves the safety of nuclear reactor shutdown, and reduces the arrangement and maintenance costs.

The invention relates to a preparation method of a cadmium oxide / titanium nitride / sulfur indium cadmium heterostructure nano photocatalytic material, which comprises the following steps: by taking cadmium nitrate tetrahydrate and ammonium chloride as raw materials, depositing a cadmium hydroxide nano structure on the surface of conductive glass by adopting an electrochemical deposition method, and drying and calcining the cadmium hydroxide nano structure to obtain a cadmium oxide nano structure; coating the surface of the cadmium oxide nanostructure with a titanium nitride solution by adopting a spin-coating method, and drying to obtain a cadmium oxide / titanium nitride heterostructure; a water bath method is adopted, cadmium nitrate hydrate, thioacetamide and indium nitrate serve as raw materials, sulfur-indium-cadmium nanoparticles are loaded on the surface of the cadmium oxide / titanium nitride heterostructure, and the cadmium oxide / titanium nitride / sulfur-indium-cadmium heterostructure nanometer photocatalytic material is obtained after drying. Bidirectional hot electrons and carriers are generated by utilizing the surface plasma resonance effect of titanium nitride nanoparticles, and by combining a stepped charge channel of cadmium oxide and sulfur indium cadmium, the solar energy utilization rate and the photon-generated carrier separation efficiency are improved, and the performance of producing electricity and hydrogen by decomposing water through cadmium oxide is improved.

The present invention provides a preparation method and application of an S-type CdS-MnO2 heterojunction photothermal catalyst, the preparation method comprising: providing high-purity manganese dioxide; and dissolving cadmium nitrate tetrahydrate in deionized water to obtain a first solution; dissolving polythiocyanate in deionized water, and adding sodium hydroxide to adjust the pH value to obtain a second solution; adding the second solution dropwise to the first solution, stirring, aging, filtering, washing, and drying to obtain a precursor cadmium trithiocyanate; cadmium trithiocyanate and manganese dioxide are mixed in deionized water, reacted under heating conditions, filtered, washed, and dried to obtain the S-type CdS-MnO2 heterojunction photothermal catalyst, the preparation method process is simple, the prepared catalyst has good stability, and the photothermal synergistic catalytic performance is high. The present invention also provides an S-type CdS-MnO2 heterojunction photothermal catalyst and a toluene photothermal catalytic oxidation method.

The invention discloses a preparation method and application of a Cd-doped SnO2 nanofiber triethylamine sensitive material, and the Cd-doped SnO2 nanofiber triethylamine sensitive material is prepared from the following raw materials by weight: 0.0019 to 0.0188 g of cadmium nitrate tetrahydrate (Cd (NO3) 2.4 H2O), 0.1395 g of stannous chloride dihydrate (SnCl2. 2H2O), 6 to 8 g of ethanol, 1.5 to 3 g of N, N-dimethylformamide (DMF), 0.7 to 0.9 g of polyvinylpyrrolidone (PVP), 0.1 to 0.3 g of ethylene glycol and 0.1 to 0.3 g of THF. In the preparation process, after metal salts containing cadmium and tin are mixed with various solvents, the Cd-doped SnO2 nanofiber triethylamine sensitive material is prepared through electrostatic spinning, drying and calcining processes. A gas sensor prepared from the Cd-doped SnO2 nanofiber triethylamine sensitive material shows excellent gas-sensitive response, selectivity and moisture resistance to triethylamine, and the detection limit of the gas sensor is as low as 0.1 ppm.

The application relates to a preparation method of a cadmium sulfide@metal organic framework heterojunction composite material, and belongs to the fields of photochemical energy conversion and photocatalytic degradation. The application aims to solve the technical problems of high-quality preparation of an artificial photosynthesis photocatalytic composite material and how to effectively improve the photochemical energy conversion efficiency. The method comprises the following steps: firstly, zirconium tetrachloride, 2-amino-4,4'-biphenyldicarboxylic acid and acetic acid are dissolved in N,N-dimethylformamide, and then the mixture is transferred into a reaction kettle for heating; after the reaction is completed, the mixture is cooled to room temperature, and then taken out, washed and dried to obtain a UiO-67-NH2 solid powder; secondly, the UiO-67-NH2 powder, cadmium nitrate tetrahydrate and thioacetamide are added into deionized water, and then the mixture is continuously stirred after being heated; after the reaction is completed, the mixture is cooled to room temperature, and then washed and dried for multiple times to obtain a cadmium sulfide@metal organic framework (CdS@UiO-67-NH2) heterojunction composite material.

The present invention discloses a Co 2+ Doped CdMOFs-cadmium sulfide photoanode catalyst and its preparation method and application, the method includes: placing an FTO / CdS photoelectrode in an argon atmosphere for annealing, and treating it with an ozone cleaner to obtain a pretreated FTO / CdS photoelectrode; mixing anhydrous ethanol, N,N-dimethylformamide, a chiral H3L ligand, and 4,4'-bipyridine to form a ligand mixed solution; the chiral H3L ligand has the structural formula #imgabs0#; mixing a cadmium nitrate aqueous solution, a cobalt nitrate ethanol solution, and the ligand mixed solution to obtain a precursor solution; placing the pretreated FTO / CdS photoelectrode conductive surface downward in a hydrothermal reactor, injecting the precursor solution, sealing it, and hydrothermally reacting it at 60-80°C for 40-50h, and cooling it to room temperature. The method of the present invention is simple in process, low in cost, and has good repeatability. The product has uniform morphology and consistent size. As a catalyst, it exhibits excellent catalytic performance in photoelectrocatalytic water oxidation reactions.

The application discloses a preparation method and application of a deep coal rock gas methane adsorbent based on a graphene and MOF composite material, and belongs to the technical field of deep coal rock gas methane adsorption and purification. The preparation method is as follows: graphene material after pretreatment is prepared; cadmium nitrate, 3-amino-4-pyridine carboxylic acid and solvent B are mixed until completely dissolved to prepare a mixture; the mixture is placed in a set temperature to generate a coordination reaction, and then is cooled and crystallized; the crystal is washed and dried to prepare Cd-MOF; the graphene material after pretreatment and the Cd-MOF are added into solvent A, and then additives and a crosslinking agent are added and stirred to react, so that the composite material is prepared; a binder is added into the composite material, and then tabletting is carried out to prepare a shaped composite material; and the shaped composite material is subjected to high-temperature activation treatment in a protective atmosphere, so that the deep coal rock gas methane adsorbent is prepared. The graphene and the MOF are synthesized into the composite material, and the advantages of the two are complementary.

The invention discloses a cadmium metal organic complex material. A ligand of the cadmium metal organic complex material is a dicarboxyl derivative H2DPDBP based on tetraphenyl ethylene. The molecular formula of the complex material is C48H44CdN2O6, the complex material belongs to an orthorhombic system, the space group is Pna21, and the cell parameters are as follows: a = 39.526 (2), b = 9.9225 (5), c = 10.0717 (4), alpha = 90 degrees, beta = 90 degrees, gamma = 90 degrees and V = 3950.1 (3). The preparation method of the material comprises the following steps: putting cadmium nitrate and a ligand H2DPDBP into a mixed solvent of N, N-dimethylacetamide and methanol to carry out solvothermal reaction, cooling, filtering, washing and drying to obtain a product. The preparation method is simple, convenient and stable in yield. The material shows strong blue fluorescence emission under a 365nm ultraviolet lamp at room temperature, and has good thermal stability, and the fluorescence quantum yield is up to 98.1%.

The invention belongs to the technical field of photocatalysis, and particularly relates to a NiO / Ag / CdS photocatalyst as well as a preparation method and application thereof. The method comprises the following steps: dissolving nickel nitrate hexahydrate in water, adjusting the pH value to 8, stirring in a water bath, heating to 300 DEG C after drying, and keeping at a constant temperature to obtain NiO; then dissolving in water, carrying out ultrasonic treatment, adding AgNO3, stirring, and irradiating under a xenon lamp to obtain a NiO / Ag composite material; and dissolving cadmium nitrate and thiourea in ethylenediamine, then adding the NiO / Ag composite material, stirring to obtain a precursor solution, then transferring the precursor solution into a high-pressure reaction kettle, placing the high-pressure reaction kettle in a forced air drying oven, and carrying out heat treatment, cooling, washing and drying to obtain the NiO / Ag / CdS photocatalyst. According to the invention, the Z-type heterojunction is constructed by using the Ag nanoparticles as an electron medium, so that the recombination path of CdS conduction band electrons and NiO valence band holes is accelerated, and meanwhile, the light response range is widened by virtue of the SPR (Surface Plasmon Resonance) effect.

The utility model discloses a reactor shutdown system and a reactor pressure vessel pressure stabilizing system. The reactor shutdown system comprises a reactor pressure vessel, a storage tank, a high-pressure gas cylinder group and a pipeline, a cadmium nitrate solution is stored in the storage tank; high-pressure nitrogen is stored in the high-pressure gas cylinder group; the high-pressure gas cylinder group, the storage tank and the reactor pressure vessel are sequentially communicated through a pipeline; according to the utility model, the cadmium nitrate solution in the storage tank is pushed into the reactor pressure vessel by using the high-pressure nitrogen in the high-pressure gas cylinder group, so as to realize shutdown of the reactor pressure vessel; a passive injection mode is adopted, so that the reliability of the system is improved, a reactor shutdown system can still be executed under the condition that a power supply is completely lost, the diversified requirements of the reactor shutdown system means are met, and the reliability of the system is improved; a novel injection material is used, existing pipelines in the system are utilized, a large number of devices are reduced, and the requirement for spatial arrangement is reduced.

The invention belongs to the technical field of photocatalysis, and particularly relates to a NiCoP / CdS photocatalyst as well as a preparation method and application thereof. The method comprises the following steps: dissolving Ni (NO3) 2.6 H2O, Co (NO3) 2.6 H2O and C6H12N in water, stirring, and calcining with NaH2PO2.H2O in an N2 atmosphere to obtain NiCoP; dissolving cadmium nitrate and thiourea in ethylenediamine, then adding NiCoP, and mixing under a magnetic stirrer to obtain a precursor solution; and finally, putting into a high-pressure reaction kettle, carrying out heat treatment in a forced air drying oven, and cooling, centrifuging, washing and drying after the heat treatment is finished, so as to obtain the NiCoP / CdS photocatalyst. The catalyst provided by the invention has relatively strong visible light absorption capacity, relatively large specific surface area and efficient photo-induced electron transfer from an interface to NiCoP, and shows a wide application prospect in the field of photocatalytic hydrogen production.

The application discloses a chlorophyll-modified CdS / UiO-67-NH2 artificial photocatalyst and a preparation method thereof, and belongs to the field of photochemical energy conversion and photocatalytic degradation. The application relates to the preparation of an artificial photocatalyst composite material, and mainly solves the problems of poor catalytic performance of the material, fast carrier recombination and complicated preparation. The application has the following steps: firstly, zirconium tetrachloride, 2-amino-4,4'-biphenyldicarboxylic acid and acetic acid are added into a N,N-dimethylformamide solvent and stirred, and then heated; after cooling, the product is cleaned with ethanol, and vacuum drying is conducted to obtain UiO-67-NH2 powder; secondly, the UiO-67-NH2 is dispersed in deionized water, and then cadmium nitrate tetrahydrate and thioacetamide are added and dissolved, and then heated and continuously stirred; after cooling, the product is cleaned with deionized water, and vacuum drying is conducted to obtain CdS / UiO-67-NH2 powder; thirdly, spinach is ground in ethanol, and then a large amount of ethanol is added and stirred, and then centrifuged, and then the upper liquid is taken to obtain a chlorophyll solution; and fourthly, a proper amount of CdS / UiO-67-NH2 powder is taken into a mortar, the chlorophyll solution is added, and then ground until dry to obtain Chl@CdS / UiO-67-NH2 composite material powder.

The application discloses a three-dimensional cadmium metal organic framework material with a fluorescent detection function, and synthesis and application thereof, and has a chemical formula of Cd4(BTB)3(DMF)2(H2O)6·((CH3)2NH2). The synthesis method of the three-dimensional cadmium metal organic framework material is generated by a solvothermal reaction of 1,3,5 benzene-triphenylmethane acid BTB and anhydrous cadmium nitrate. The three-dimensional cadmium metal organic framework material with the fluorescent detection function is applied to detection of p-nitrophenol. The complex can specifically detect p-nitrophenol, has strong anti-interference ability, low detection limit and fast response speed, has strong acid and alkali resistance, and good fluorescent stability. In addition, the three-dimensional cadmium metal organic framework material has low raw material cost, simple and environment-friendly synthesis method, and high yield.

The invention provides an in-situ heterojunction CdS / MoS2 catalyst, a preparation method and application, and relates to the technical field of photocatalytic water decomposition, and the preparation method comprises the following steps: adding ammonium molybdate and cadmium nitrate into deionized water, and uniformly stirring and mixing to form a transparent solution; absolute ethyl alcohol is added into the transparent solution, the pH value is adjusted, and a CdMoO4 precursor stable system is generated; adding sodium sulfide and sodium sulfite into the CdMoO4 precursor stable system to obtain a mixed solution; the mixed solution is subjected to a reaction under the illumination condition, and the in-situ heterojunction CdS / MoS2 catalyst is generated. According to the in-situ heterojunction CdS / MoS2 catalyst, the preparation method and the application provided by the invention, the interface structure and performance of the catalyst can be optimized, and the photocatalytic efficiency is remarkably improved.