383 results about "4-Nitrophenol" patented technology

The invention belongs to a loaded two-dimensional layered molybdenum sulfide composite material, and discloses a composite nano catalytic material loaded with precious metals (Ag, Au) and its application in catalytic reduction of p-nitrophenol. The present invention adopts a two-step synthesis technique, first using a hydrothermal method to synthesize molybdenum sulfide nanosheets with a porous and ultra-thin structure, and then using ultraviolet light reduction technology to load noble metal nanoparticles onto the two-dimensional layered compound molybdenum sulfide with a sandwich structure On the surface, combining the nano-confined growth effect can effectively avoid the agglomeration phenomenon in the preparation process of noble metals, and finally obtain noble metal nanoparticles with uniform size distribution. In this supported catalyst system, the metal catalytic active center and the carrier jointly constitute the catalyst, due to the localized surface plasmon resonance effect of the noble metal active component and the synergistic effect between the noble metal active component and the carrier.

The invention provides a preparation method of a nitrogen-doped mesoporous carbon catalyst for wastewater degradation. The preparation method comprises the following steps: zinc salt and nitrogen-containing ligand at the mole ratio of (1:1) to (5:1) are dissolved in an organic solvent to form a homogeneous solution, 5-20 mL of triethylamine is added into the solution dropwise, the solution is stirred for 0.5-3 h and filtered to obtain a solid product, and the solid product is subjected to washing, solvent exchange and vacuum drying to obtain powder of metal-organic frameworks containing nitrogen and zinc; the powder of metal-organic frameworks containing nitrogen and zinc is heated in a nitrogen atmosphere to be greater than or equal to 910 DEG C at the speed of 2-20 DEG C / min, and the temperature is kept for 1-12 h, and then is reduced to the room temperature, so that the catalyst is obtained. The invention further provides the nitrogen-doped mesoporous carbon catalyst for wastewater degradation, which is prepared by the preparation method, and application of the catalyst to wastewater degradation. The catalyst does not contain metals, has a low nitrogen content and a larger specific surface area, is easy in preparation method and economic in step, and can efficiently degrade 4-nitrophenol in wastewater.

The invention belongs to the technical field of nano-materials, and relates to a preparation method of recyclable supported nano-silver catalyst materials and an application of the materials, in particular to a silver nano-catalyst preparation method based on surface-functionalization cellulose paper base and application of the preparation method to circular catalysis and transformation of environmental pollutants. The preparation method of the recyclable cellulose paper base nano-silver catalyst materials includes the steps: taking cellulose paper base materials as a support; performing amino modification on support surfaces by the aid of silane coupling agents; enabling amino of the modified support surfaces and metal precursor ions to chelate; adding reducing agents to reduce to form the cellulose paper base nano-silver catalyst materials. The prepared cellulose paper base nano-silver catalyst materials serve as a catalyst to reduce 4-aminophenol by the aid of 4-nitrophenol, are high in catalytic activity and good in reusable performance and still keep higher catalytic activity when continually and circularly being used by 20 times or more, support stability and silver nano-stability are high, and catalysts are easily recycled.

The invention discloses a preparation method for a catalyst efficiently catalyzing hydrogenation reduction of 4-nitrophenol, and belongs to the technical field of nanometer material preparation and application. Employed graphene-shaped non-integer-ratio cobaltous selenide (Co[0.85]Se) has the thickness not larger than 10 nanometer, and titanium dioxide supported by the cobaltous selenide (Co[0.85]Se) has the particle size of about 10 nanometer. The catalyst is large in specific surface area, has high catalytic efficiency on hydrogenation reduction of 4-nitrophenol, does not employ noble metals and is low in cost. The preparation method is simple, easy to operate, free of organic templates and surfactants, and suitable for industrial production. The prepared titanium dioxide / cobaltous selenide (Co[0.85]Se) is pure in phase, large in specific surface area, good in catalytic reduction effect on 4-nitrophenol and high in repeated utilization value, and has potential utilization value on the aspect of sewage processing.

A disclosed fertilizer quick-acting long-acting synergist comprises the following raw materials: 2, 4-dinitrophenol sodium salt, 4-nitrophenol sodium salt, 2-nitrophenol sodium salt, polyaspartic acid, polyglutamic acid, hydroquinone, thiourea, 3,4-dimethyl-1H-pyrazolium dihydrogen phosphate, acrylamide, dicyandiamide, N-J N-(N-butyl)thiophosphoric triamide, 2-methoxy-5-nitrophenol, sodium alpha-naphthyl acetate, 6-benzylaminopurine, humic acid and potassium hydroxide. The fertilizer quick-acting long-acting synergist is substantially improved in selection and proportion of the raw materials; by cooperating with a fertilizer, the synergist is capable of making the fertilizer rapidly work, keeping long-term effectiveness of the fertilizer, prolonging the fertilizer effectiveness up to 140 days mostly, comprehensively improving fertilizer effective availability by 30% or more and saving fertilizer usage amount by 20%, wherein crops applied with the synergist have substantial effect on absorption and growth just after 1-2 days.

The invention discloses a preparation method of arbidol hydrochloride. The preparation method comprises the following steps of: (1) performing hydroxylation reaction on 3-iodo-4-nitrophenol serving as a raw material by using acetyl chloride to obtain a compound I; (2) performing substitution reaction on the compound I and ethyl acetoacetate under the action of alkali to obtain a compound II; (3) performing reduction-condensation concerted reaction on the compound II under the conditions of acetic acid and iron powder to synthesize an indole ring, and obtaining a compound III; (4) performing N-methylation reaction on the compound III by using dimethyl sulfate to obtain a compound IV; (5) performing di-bromination reaction on the compound IV in carbon tetrachloride by using bromine to obtain a compound V; (6) reacting the compound V and thiophenol under the alkali condition, and obtaining a compound VI after acidifying; (7) preparing a compound VII from the compound VI in the presence of a reaction solvent, namely aqueous solution of dimethylamine and formaldehyde; and (8) acidifying the compound VII in hot acetone to obtain the arbidol hydrochloride. The preparation method is facile in raw materials, mild in reaction conditions, high in yield, easy in separation and purification, low in cost and suitable for industrialized production.