115 results about "Fe doped" patented technology

The invention discloses a preparation method of a three-dimensional layered structure Fe-doped Ni-MOF nano-array (Fe0.1-Ni-MOF / NF) which is grown in situ on foamed nickel and has high regular array. Nickel foam is used as a conductive substrate. The NiFe-LDH nano-array (NiFe-LDH / NF) firstly grows by a hydrothermal method, and then terephthalic acid is used as an organic ligand to convert a NiFe-LDH / NF precursor template to Fe0.1-Ni-MOF / NF by a solvothermal method, and the product is used as an electrocatalyst for water oxidation reaction. The electrocatalyst shows excellent catalytic activity(eta 100mA cm-2=263mV) in 1M KOH electrolyte, which is much better than undoped Ni-MOF / NF material (eta 100mA cm-2=298mV). The invention fully utilizes the doping introduction impurity level to regulate the electronic configuration and induce the synergy effect between metals, and the highly regularly arranged layered structure nano-array reduces the series resistance, exposes more active sites and promotes the diffusion of electrolytes and evolved gases. A novel energy-transduction material with high electrocatalytic activity, good cycle stability, durability and low cost is constructed.

The invention discloses a preparation method of a fe-doped carbon nitride / mesoporous graphite carbon composite catalyst. The method comprises the steps that 1, dicyandiamide is added into hot water, ferric salt is added for a period of time after the dicyandiamide is dissolved completely, mesoporous graphite carbon is added, continuous heating is performed till water is evaporated completely, and slight grinding is performed to obtain black powder; 2, the black powder is placed into a tube furnace to be calcined under the protection of nitrogen gas, and the fe-doped carbon nitride / mesoporous graphite carbon composite catalyst is obtained. The invention further discloses the catalyst obtained through the preparation method and an application method of the catalyst. Due to mutual effects of Fe, graphite phase carbon nitride and mesoporous graphite carbon, Fe is mainly dispersed into the catalyst in an N-coordinate mode, and the quite high Fenton-like catalytic activity can be shown.

An EA-DFB module including a DFB laser diode and an EA modulator formed on an InP first-conductivity-type substrate has a mesa stripe, a current blocking structure formed on both side surfaces of the mesa strip and a second InP cladding layer formed on top of the mesa stripe and the current blocking structure. The current blocking structure includes a Fe-doped semi-insulating film, a first conductivity-type buried layer and a carrier-depleted layer. The carrier-depleted layer reduces the parasitic capacitance at the boundary between the first-conductivity-type buried layer and the second InP cladding layer.

The invention discloses a Fe-doped two-phase nickel sulfide nano array material which comprises a conductive substrate material and a Fe-doped two-phase nickel sulfide nano array structure material growing on the conductive substrate material. The invention further discloses a preparation method of the Fe-doped two-phase nickel sulfide nano array material and application of the Fe-doped two-phasenickel sulfide nano array material in an anode material for oxygen evolution with electrolytic water.

The invention discloses a preparation method of a Fe-doped oxyhalogen bismuth nanometer material. The method comprises the following steps of respectively preparing an ethylene glycol solution of pentahydrate bismuth nitrate and a water solution of halite and iron nitrate nonahydrate; at the room temperature, dripping the obtained water solution into the ethylene glycol solution; using the ultrasonic effect as an auxiliary measure to take reaction; finally, washing, drying and cooling obtained precipitates to obtain the Fe-doped oxyhalogen bismuth nanometer material. The preparation method has the advantages that the one-step synthesis process of the Fe-doped oxyhalogen bismuth nanometer material can be realized under the room-temperature condition; high-temperature and high-pressure conditions are not needed; the reaction conditions are mild; the reaction time is short; the energy is saved; the consumption is reduced; the related synthesis process is simple; the raw material cost and the production cost are low; the repeatability is good; the preparation method is suitable for industrial popularization and application.

The present invention belongs to the field of deep water treating and photocatalyzing technology, and provides process of eliminating nitrate nitrogen from water, especially underground water and drinking water. The present invention features that zero-valent Fe doped TiO2 is prepared through chemical reduction and utilized in reducing nitrate nitrogen and decreasing total nitrogen content in water through photocatalytic reaction to avoid formation of harmful ammonia nitrogen and nitrite nitrogen during eliminating dissolved oxygen and replenishing formic acid as electron donor. The present invention provides one new kind of photocatalyst for reducing nitrate nitrogen and decreasing total nitrogen content in water effectively in low cost.

The invention discloses a microspherical Fe-doped trinickel disulfide nanostructure material composed of nanosheets, and a preparation method and application thereof. The preparation method comprisesthe following steps: dissolving a nickel salt, an iron salt and thiourea in ethylene glycol, transferring the formed solution into a reaction vessel, obliquely placing foamed nickel into the solution,performing a solvothermal reaction, carrying out cooling to room temperature after completion of the reaction, and washing and drying a product so as to obtain the microspherical Fe-doped trinickel disulfide nanostructured material composed of nanosheets. Compared with the prior art, the invention is different in that the microspherical Fe-doped Ni3S2 nanostructure composed of the nanosheets is designed and synthesized on a conductive foamed nickel substrate. Fe doping is used for improving the electrochemically active area and conductivity of the material. The microspherical Fe-doped Ni3S2 nanostructured material composed of the nanosheets in the invention is applied as an electrocatalyst for oxygen evolution reactions, hydrogen evolution reactions and full water decomposition reactionsand has the advantages of high catalytic activity, excellent stability, simple preparation process and low cost.

A semiconductor laser includes a p-type InP substrate and a ridge section of a p type InP first cladding layer, an AlGaInAs strained quantum well active layer and a n type InP second cladding layer, laminated one atop the other. On both sides of the ridge section, a current blocking layer including a p-type InP first burying layer, an n-type InP second burying layer, and a semi-insulating Fe-doped InP third burying layer are laminated, one atop the other. A top face of the third burying layer is covered with an n-type InP semiconductor layer. This structure suppresses leakage current on the top face of the third burying layer and improves reliability of the semiconductor laser.

The invention relates to a Czochralski growth method of a terbium gallium garnet (TGG) magneto-optical crystal, comprising the following steps: preparing a Tb3Ga5-xMxO12 polycrystal by liquid-phase coprecipitation and letting the TGG magneto-optical crystal grow by using a Czochralski method, wherein M represents one or two elements selected from Al or Fe. The method combines the advantages of the TGG crystal and a TAG crystal, lets an Al-doped TGG (Tb3Ga5-xAlxO12, x=0-0.5) magneto-optical crystal, an Fe-doped TGG (Tb3Ga5-xFexO12, x=0-0.5) magneto-optical crystal or a TGG double doped with Al and Fe (Tb3Ga5-x-yAlxFeyO12, x+y=0-0.5) magneto-optical crystal grow by using the Czochralski method, the growth process is simple and easy to industrialize, the Verdet constant of the TGG magneto-optical crystal is 10-20 % higher than that of the TGG crystal, the crystal size of the TGG magneto-optical crystal is several times higher than that of the TAG crystal, and the TGG magneto-optical crystal is an optical isolator material having excellent performance.

The invention relates to a preparation method of a Fe-MnO2 catalyst for purifying VOCs through efficient photo-thermal synergistic catalysis. The preparation method has the beneficial effects that a target catalyst is only synthesized from soluble Fe(II) salt, Mn(II)salt and KMnO4 which are low in cost and easily available through hydrothermal reaction, reaction conditions are mild, the process is simple, no additive is added, the high-temperature calcination is not required, and heavy metals do not need to be loaded, so that the production cost is greatly lowered. A Fe-doped MnO2 composite catalyst prepared by virtue of the preparation method has very strong absorbency in an ultraviolet spectrum, a visible spectrum and an infrared spectrum and has efficient catalytic activity and stability for photoinduced thermocatalytic degradation of VOCs in the ultraviolet spectrum, the visible spectrum, the infrared spectrum and a full spectrum, and the photoinduced thermocatalytic activity of the catalyst is far higher than that of commercial TiO2 (P25) as a standard photocatalyst, and the deficiency that TiO2 (P25) only has ultraviolet light catalytic activity is overcome.

The invention discloses an immobilized ionic liquid catalyst, and a preparation method and an application thereof. The method is characterized in that an acidic ionic liquid is immobilized to the surface of a Fe-doped meso-porous material SBA-15 which is Fe-SBA-15 through a bonding grafting technology; the immobilization capacity of the acidic ionic liquid on the Fe-SBA-15 is 0.5-1.5mmol / g; and the doping mass fraction of Fe in the Fe-SBA-15 is 0.5-3.6%. The prepared catalyst simultaneously has Lewis acidity and Bronsted acidity. The catalyst has the advantages of high catalysis activity, low corrosion, mild reaction conditions, easy separation and recovery, and reusability in a reaction for synthesizing biodiesel through esterifying oleic acid and short chain alcohol.

The invention belongs to the production of two-dimensional nano-materials, and concretely relates to a chemical vapor deposition preparation method for an Fe-doped monolayer MoS2. Sublimed sulfur is used as a sulfur source, molybdenum trioxide is used as a molybdenum source, an Fe compound is selected as an Fe element dopant, highly-pure argon is used as a current carrying gas to transport a precursor to a reaction area, a substrate selects SiO2 / Si, and the substrate is pretreated before a growth reaction. The whole growth process comprises a spatial gas phase reaction process and a surface growth process. Low-valence transition metal oxide, transition metal oxysulfides, transition metal sulfides and various other intermediate groups are generated in the spatial gas phase reaction process,the Fe compound reacts with all the various intermediate groups on the upper part of the substrate together with the current carrying gas, a large area of the Fe-doped monolayer MoS2 grows on the substrate through adsorption, diffusion, reaction and desorption processes, and the largest size can reach 30 [mu]m.

An EA-DFB module including a DFB laser diode and an EA modulator formed on an InP first-conductivity-type substrate has a mesa stripe, a current blocking structure formed on both side surfaces of the mesa strip and a second InP cladding layer formed on top of the mesa stripe and the current blocking structure. The current blocking structure includes a Fe-doped semi-insulating film, a first conductivity-type buried layer and a carrier-depleted layer. The carrier-depleted layer reduces the parasitic capacitance at the boundary between the first-conductivity-type buried layer and the second InP cladding layer.

The invention discloses an electro-deposition method for preparing the three band gap Fe-doped with copper gallium sulfur solar cell materials. The method includes the following steps: dissolving the copper chloride, the gallium chloride and the ferric chloride in the ionic liquid, depositing the Cu, Ga and Fe prefabricated layers on the constant potential of the substrate, conducting the vulcanization annealing treatment on the prefabricated layers, and finally preparing the Fe-doped with copper gallium sulfur thin film materials. The electro-deposition method for preparing the three band gap Fe-doped with copper gallium sulfur solar cell materials can effectively reduce the adverse effect of the hydrogen evolution reaction on the quality of the thin film due to the fact that the ionic liquid is used as the solvent, simple in preparation technology, high in utilization rate of raw materials, low in production cost, strong in controllability, good in repeatability, capable of realizing the preparation of the large-area high-quality thin film and large-scale production, good in crystallinity, compact and flat in surface topography, and capable of broadening the absorption of the solar energy spectral by the materials through the generated sub-band gap and obviously increasing the photo-generated current of materials.

The invention provides a ZIFs-derived non-noble metal oxygen reduction catalyst and a preparation method thereof and application thereof. The preparation method comprises the following steps of: 1) dissolving iron salt, zinc salt and 2-methylimidazole in a solvent for reaction to obtain a Fe-doped ZIFs precursor and perform drying; 2) performing primary thermal treatment of the dried Fe-doped ZIFsprecursor in the protection of a protection gas; 3) performing pickling, filtering, washing and drying of the primary thermal treatment product; 4) performing secondary thermal treatment of the driedproduct to obtain a ZIFs-derived non-noble metal oxygen reduction catalyst. The ZIFs-derived non-noble metal oxygen reduction catalyst has a porous structure and rich micropores and mesopores, is high in doping amount of hetero atoms, contains two active sites of Fe2N and FeNx, and facilitates improvement of the oxygen reduction activity.

The invention discloses a preparation method and application of an Fe-doped PTFE-PbO2 / TiO2-NTs / Ti electrode. The preparation method comprises the following steps of: polishing and cleaning previously cut titanium plates, and placing the cleaned titanium plates respectively as an anode and a cathode into a solution for electrolysis; taking out an anode electrode after the electrolysis, washing to be clean by using water, drying, then placing into a muffle furnace, and baking to obtain a TiO2 nanotube; and electrodepositing in electrolyte by taking the TiO2 nanotube as the anode and graphite as the cathode to prepare the Fe-doped PTFE-PbO2 / TiO2-NTs / Ti electrode which takes Ti as a base plate. The Fe-doped PTFE-PbO2 / TiO2-NTs / Ti electrode prepared through the method disclosed by the invention has the advantages of higher treatment efficiency on industrial wastewater, stability in catalytic oxidation effect and longer electrode service life 8.1 times longer than that of common PbO2 / Ti, has higher oxygen evolution potential under a same condition and is difficult to generate oxygen evolution side reaction and more favorable to sufficiently carrying out electrocatalytic oxidation reaction.

Techniques for device isolation for III-V semiconductor substrates are provided. In one aspect, a method of fabricating a III-V semiconductor device is provided. The method includes the steps of: providing a substrate having an indium phosphide (InP)-ready layer; forming an iron (Fe)-doped InP layer on the InP-ready layer; forming an epitaxial III-V semiconductor material layer on the Fe-doped InP layer; and patterning the epitaxial III-V semiconductor material layer to form one or more active areas of the device. A III-V semiconductor device is also provided.

The invention provides a method for preparing a Fe-doped ZnO room temperature diluted magnetic semiconductor material, which adopts a coprecipitation method and includes: A. prepare a mixed solution of Fe<3+> and Zn<2+> and a NaOH solution; B. mix the mixed solution of Fe<3+> and Zn<2+> and the NaOH solution to form a precipitate, then filter, separate and wash the precipitate; C. dry, pre-sinter, grind, tablet and sinter the precipitate to obtain the Fe-doped ZnO room temperature diluted magnetic semiconductor material. The invention provides a completely new method for preparing the Fe-doped ZnO room temperature diluted magnetic semiconductor material and the Fe-doped ZnO room temperature diluted magnetic semiconductor material prepared by the method has room temperature ferromagnetism.

The invention provides a high-performance bismuth vanadate photo-anode film and a preparation method thereof. The photo-anode film comprises a gradient molybdenum doped bismuth vanadate film light absorption layer and a Fe doped NiO ultra-thin section catalyst on the surface of the light absorption layer. The preparation method includes the steps: 1) depositing a bismuth film on an FTO conductingglass substrate; 2) reacting the bismuth film and vanadiumoxy acetylacetonate at the 450 DEG C to obtain an undoped bismuth vanadate film; 3) doping the bismuth vanadate film by the aid of the vanadiumoxy acetylacetonate and diacetylacetone diacetone oxide to obtain a gradient molybdenum doped bismuth vanadate film; 4) rotatably coating the molybdenum doped bismuth vanadate film with a Fe doped Ni(OH)2 ultra-thin section, and performing heat treatment to obtain the bismuth vanadate photo-anode film loaded the Fe doped NiO catalyst. The method is simple, convenient and environmentally friendly,and the prepared bismuth vanadate photo-anode film effectively facilitates electric charges to be separated and transmitted and has good visible light absorption performance and photoelectric water decomposition performance.

The invention discloses a Fe-doped stannic oxide / reduced graphene oxide (Fe-SnO2 / RGO) nanometer composite wave absorption material and a preparation method thereof. The Fe-SnO2 / RGO binary composite material is prepared by taking graphene oxide (GO), tin tetrachloride pentahydrate and iron nitrate nonahydrate as a precursor and by one-step hydrothermal reaction. The preparation method is green andenvironmental-friendly, no any harmful side product is generated, and the preparation process is simple and is low in cost. The prepared binary nanometer composite wave absorption material has the characteristics of high absorption strength, dual-band (C and Ku bands) absorption, low density and the like; and by adjusting the content of Fe<3+> doped in the composite material and the thickness of awave absorption coating layer, effective absorption of electromagnetic waves at different bands can be achieved, and the preparation method has important application value in the field of electromagnetic absorption and electromagnetic shielding.

The invention provides a preparation method of an Fe-doped nickel-based activated carbon catalyst and application thereof in hydrogenation reaction of nitrocyclohexane. According to the preparation method, activated carbon is acidified first, then the acidified activated carbon is used as a carrier to be loaded with nickel and iron simultaneously, and then the Fe-doped nickel-based activated carbon catalyst is applied to the hydrogenation reaction of nitrocyclohexane. The preparation method uses Fe for carrying out doping modification, has low cost and low pollution, cannot corrode equipment, and adopts the non-noble metal nickel as the active component and activated carbon as the carrier, thus obviously reducing the cost; and the prepared catalyst is used in the hydrogenation reaction of the nitrocyclohexane and can improve the conversion rate of nitrocyclohexane and the selectivity of cyclohexanone-oxime in relatively mild reaction conditions, thereby realizing production of high-quality cyclohexanone-oxime with a low-cost catalyst.

Belonging to the technical field of photocatalyst preparation, the invention relates to a preparation method for molecular imprinting-Fe doped TiO2 with high catalytic degradation activity under visible light. According to the invention, TiCl4 is adopted as the titanium source to synthesize Fe doped TiO2 by a hydrothermal technique, then p-phenylenediamine is taken as the monomer and cross-linking agent, and an organic pollutant is employed as the template molecule to carry out chemical oxidation polymerization to synthesize molecular imprinting-Fe doped TiO2. Compared with Fe doped TiO2, the synthesized molecular imprinting-Fe doped TiO2 has stronger adsorption capacity on organic pollutants, has higher catalytic degradation activity on organic pollutants under visible light, and has the catalytic degradation ability increased by 35%, thus having high practical application value.

The invention discloses Fe-doped walnut shell activated carbon for treating dye wastewater as well as a preparation method and an application of the activated carbon. The Fe-doped walnut shell activated carbon takes walnut shells as a raw material and is prepared through acid solution treatment, inorganic salt treatment, pyrolysis treatment, activating treatment and high-temperature heat treatment. The Fe-doped walnut shell activated carbon has the Fe content of 2.15%(wt%), the specific surface area of 1779.31 m<2> / g, the maximum adsorption of 531.08 mg / g for methylene blue as well as the adsorption exceeding 500 mg / g for other dyes including methyl orange, malachite green and methyl red. The Fe-doped walnut shell activated carbon is high in adsorption capacity, high in adsorption speed, easy to recycle and reusable, and the treatment cost is greatly saved. Meanwhile, according to the method, the waste walnut shells are taken as the raw material, operation is convenient, the cost is low, secondary pollution cannot be caused, and agricultural waste is recycled.

The invention discloses a preparation method of an Fe-doped TiO2 nanotube photocatalyst, which comprises the following steps: adding P-25 TiO2 powder and Fe(NO3)3.9H2O into an NaOH solution, magnetically stirring for 0.5 hour, transferring into a polytetrafluoroethylene beaker, reacting at 105 DEG C for 24 hours, taking out, cooling to room temperature, washing with distilled water to a neutral state, soaking in 0.1 mol / L hydrochloric acid for 0.5 hour, washing to a neutral state, drying at 60 DEG C, calcining in a muffle furnace at 500-550 DEG C for 2 hours, and grinding to obtain the Fe-doped TiO2 nanotube photocatalyst. The result proves that the 550 DEG C calcined Fe-doped nanotube TiO2 catalyst has favorable catalytic effect. The catalyst disclosed by the invention has the advantages of no toxicity, low price, strong corrosion resistance, large specific grain surface area, multiple adsorption sites and high removal rate for pollutants.

The invention discloses a Fe-doped Ni3Se4 nanorod / nanosheet grading array structure material, a preparation method and application of the material. The preparation method comprises the following steps that Se powder and a reducing agent are dissolved into a mixed solution of ammonia water and deionized water, foam nickel is obliquely put into the mixed solution, and foam nickel with a precursor is obtained through a hydrothermal reaction; iron salt is dissolved into a mixed solution of ethanol and NaClO, and the foam nickel with the precursor is put in, and a product is obtained through a solvothermal reaction. Compared with the prior art, by means of a low-temperature liquid phase synthesis method, Fe<3+> ions are doped into a lattice of a Ni3Se4 grading nano-structure, the method is simple, and the cost is low; the material serving as an electrocatalyst of an oxygen evolution reaction (OER), a hydrogen evolution reaction (HER) and a whole water decomposition reaction has the advantages of being large in active area, good in electrical conductivity and the like; the Fe-doped Ni3Se4 nanorod / nanosheet grading array structure material can achieve high-efficiency whole water decomposition at high electric current density, and the excellent stability is shown at the low electric current density and the high electric current density.

The invention discloses a preparation method and application of an Fe-doped nanotube array membrane. By adopting the method disclosed by the invention, a porous nanotube array membrane of which the diameter is 40-60nm can be formed, and nanotubes are arranged perpendicular to the surface of a matrix. Compared with a TiO2 nanotube array membrane sample, the Fe-doped nanotube array membrane disclosed by the invention has better photocatalytic activity.

The invention discloses a catalyst for decomposing ozone, and a preparation method of the catalyst. The catalyst is prepared from diatomaceous earth and Fe-doped manganese oxide loaded on the diatomaceous earth, wherein the mass of Mn element in the manganese oxide accounts for 2-10% of the total mass of the catalyst. The preparation method of the catalyst comprises the following steps: (1) soaking the diatomaceous earth into a mixed solution of manganese acetate and iron salt, and enabling the diatomaceous earth to be evenly dispersed in the solution, wherein the adding amount of the diatomaceous earth is 25-200g / L; (2) separating the diatomaceous earth out from the solution, drying and then calcining to obtain the catalyst.

The invention discloses a Fe-doped hydroxyl cobalt phosphite nanosheet array structure material as well as a preparation method and application thereof. The preparation method comprises the followingsteps: dissolving ferric salt, cobalt salt and sodium hypophosphite into a mixed solvent of water and isopropanol; transferring the solution into a reaction kettle; obliquely putting foamed nickel into the solution for carrying out a solvothermal reaction, and cooling to room temperature after the reaction is finished; and washing and drying the product, so that the Fe-doped Co11(HPO3)8(OH)6 nanosheet array structure material can be prepared. According to the invention, a Fe-doped Co11(HPO3)8(OH)6 nanosheet array structure is designed and synthesized on a foamed nickel substrate; an electronicstructure of Co11(HPO3)8(OH)6 can be effectively adjusted by utilizing Fe doping, thereby reducing resistance, increasing active sites, improving hydrophilicity, and accelerating electron transfer rates; and the Fe-doped Co11(HPO3)8(OH)6 nanosheet array structure material is used as an electrocatalyst for oxygen evolution reaction, hydrogen evolution reaction and total hydrolysis reaction, has the advantages of high activity, good durability, simple preparation process and low cost, and has a very high value for researching the practical application of a water decomposition electrocatalytic electrode material.

The invention relates to a Fe-doped biochar loaded TiO2 composite material preparation method and application. A composite material takes biochar as a matrix, and calcined Fe-doped TiO2 is loaded on the surface of the matrix. The preparation method includes steps: soaking biomass powder into tetra-n-butyl titanate, ferric nitrate and absolute ethyl alcohol solution, preparing Fe-doped biomass gel, and finally subjecting the gel to pyrolysis through a tubular atmosphere furnace in an N2 atmosphere to obtain the composite material. In a Fe-doped biochar loaded TiO2 composite material preparation process, biomass pyrolysis and Fe-doped TiO2 calcination are carried out in a same heat treatment process, so that preparation cost is reduced, and preparation time is shortened. The Fe-doped biochar loaded TiO2 composite material has a great degradation effect on dyes in wastewater.

A method of preparing large-size high-porosity Fe-doped photocatalytic porous magnetic microspheres, including: dissolving a soluble macromolecule in a distilled water to obtain a solution A having a concentration of 0.5-1.5 wt %; adding a photocatalyst to the solution A, and uniformly stirring the solution A to obtain a suspension B; mixing a saturated soluble ferric salt solution with the suspension B, and uniformly stirring the mixture to obtain a suspension C; dropwise adding the suspension C to a high-concentration alkali solution by a syringe equipped with a suitable needle size to form microspheres; ageing the reaction system and drying the formed microspheres after adding; calcining the dried microspheres at 600-1100° C.; cooling the calcined microspheres to obtain the large-size high-porosity Fe-doped photocatalytic porous magnetic microspheres.