36results about How to "Increase the adsorption point" patented technology

The invention belongs to the technical field of biosensors, and in particular discloses an electrochemical sensor based on a metal organic framework-vertical graphene composite structure and a preparation method thereof. The preparation method specifically comprises the following steps: (1) growing vertical graphene on a stainless steel substrate; (2) synthesizing various different metal organic framework (MOF for short) materials such as ZIF-8, KAUST-1 and Ni-MIL-77 by taking the vertical graphene on the stainless steel substrate as a template; and (4) constructing the electrochemical sensorby taking the MOF-vertical graphene composite nanostructure as an electrode material. The electrochemical sensor has higher electric conductivity, larger specific surface area and more types of responsive substance surfaces, and the preparation method is relatively clear, different MOFs can be made by selecting materials according to performance of chemical reactions directly, and the spatial structure of the MOF material can be altered according to performance demand, so that the electrochemical sensor which further meets the demand can be manufactured more easily, and is wide in applicationrange.

Provided are a hard coating composition and a hardened membrane containing the same. The hard coating composition comprises, by weight, 30 to 80 parts of hydroxyl-containing acrylate monomers, 1 to 10 parts of an photoinitiator, 20 to 70 parts of a solvent and 0.1 part to 5 parts of a reactive organosilicon surface wetting auxiliary agent, wherein, the hydroxyl-containing acrylate monomers are a mixture of hydroxyl-containing multi-functional acrylate monomers and hydroxyl-containing low functional acrylate monomers mixed according to a weight ratio of 2:8 to 8:2. The composition provided in the invention has excellent adhesion to a PET substrate surface which is never treated and a PET substrate surface which has corona or a failure coating bottom; hardness of the hardened layer of the obtained hardened membrane is greater than 1H, and therefore, the hardened membrane can be used as a hardened membrane of an indium tin oxide (ITO) touch screen, an in-mold label (IML), or the like.

The invention discloses pillared modified kieselguhr for adsorbing Pb<2+> and/or Cd<2+> and a preparation method and application of pillared modified kieselguhr. The method comprises the following steps of: preparing pillaring liquid at a certain molar concentration according to requirements; allowing the prepared pillaring liquid to react with purified kieselguhr in a molar mass ratio of [Al] to kieselguhr of (10-15 mmol/g):1 at the temperature of between 60 and 80 DEG C for 120 to 180 minutes, putting the mixture into a drying oven, and activating at the temperature of between 105 and 120 DEG C for 16 to 18 hours to obtain polyhydroxy aluminum pillared modified kieselguhr. Compared with the conventional kieselguhr modifying method of washing, acid washing, roasting, microwaves and the like, the preparation method for the pillared modified kieselguhr has the advantages that the adsorption performance of the kieselguhr on Pb<2+> and Cd<2+> can be improved obviously; the adsorption capacity of the modified kieselguhr on Pb<2+> and Cd<2+> is improved by 31.1 percent and 45.7 percent respectively compared with kieselguhr raw ores; a process is simple and low in energy consumption; and effluent generated in the acid-washing process can be used as wastewater for treating a flocculating agent, and secondary pollution is avoided.

The invention belongs to the technical field of adsorbent materials, and particularly relates to a modified attapulgite adsorbent and a preparation method thereof. The preparation method comprises: S1, pretreatment: breaking attapulgite, and grinding to obtain attapulgite powder; S2, acid modification: dispersing the attapulgite powder obtained in the step S1 in a hydrochloric acid solution for 2h at a constant temperature of 20 DEG C, washing with ultrapure water to achieve a neutral state, and carrying out vacuum drying at a temperature of 100-110 DEG C so as to be spare; S3, thermal modification: calcining the acid-modified attapulgite powder obtained in the step S2 for 2 h at a temperature of 550-850 DEG C, naturally cooling, and screening with a 200 mesh sieve so as to be spare; andS4, modification with lanthanum: adding the modified attapulgite powder obtained in the step S3 in a lanthanum nitrate solution at a constant temperature of 20 DEG C, impregnating for 2 h, dispersingfor 2 h, washing with ultrapure water to remove residual lanthanum ions, carrying out vacuum drying at a temperature of 100-110 DEG C, and screening with a 230 mesh sieve. According to the present invention, the modified attapulgite adsorbent can effectively remove phosphorus from wastewater.

The invention provides a stabilization repairing agent for soil pollution, wherein the agent includes components such as quicklime, potassium dihydrogen phosphate, phosphate rock powder and demineralized and modified humic acid, and is prepared from, by mass, combination of the components. After the stabilization repairing agent is applied to soil contaminated by lead and cadmium and is subjectedto stabilized treatment and maintenance for one week, the concentration of lead and cadmium in a leach liquor of the soil can meet standards of groundwater quality class IV. The mixed component in thestabilization repairing agent of the invention fully exerts a synergistic effect, the effective state of heavy metals in the soil can be reduced by the action of precipitation, adsorption, improvement, pH adjustment, and the like, and the prepared soil repairing agent has good effects in repairing lead and cadmium contaminated soil. The stabilization repairing agent for the soil pollution has theadvantages of simple preparation method, feasibility and good treatment effect.

The invention relates to a preparation method of a chitosan-based organic-inorganic hybridized porous thin film, which relates to the technical field of the treatment of heavy metal-containing waste water. CS and amino silane coupling agent are used as main raw materials to be mixed with an appropriate pore forming agent NaCl, and the chitosan-based organic-inorganic hybridized porous film can be prepared by virtue of a series of steps such as solution premixing, in-situ sol-gel reaction, casting and film forming, natural air drying, treating with alkaline solution, washing, drying and the like. The CS is hybridized and cross-linked with the amino silane coupling agent, so that not only can the solubility of the CS in the acid waste water be inhibited, but also by introducing the amino, adsorption locus for metal ions is increased, and the adsorption of chromium, lead and cadmium ions in the waste water can be realized. Moreover, after being regenerated, the hybridized porous thin film after the adsorption can be reused, and the adsorption effect is not apparently decreased.

The invention provides an adsorbent for simultaneously strengthening removal of trace phosphorus and organic matter and a preparation method thereof, relates to an adsorbent and a preparation method thereof and aims at solving the problem that an existing adsorbent has low removal rate to the trace phosphorus in water and cannot remove the organic matter and phosphorus simultaneously.The adsorbent is a lanthanum-polyacrylonitrile based carbon nano fiber material.The method comprises the steps that 1, La(NO3)3 6H2O is dissolved in DMF, PAN is added, dissolution is performed to obtain a DMF solution of the PAN, high-pressure electrostatic spinning is conducted on the solution to obtain a spinning membrane, the obtained spinning membrane is subjected to alkali solution treatment, then repeated flushing is performed by using deionized water, and drying is performed; 2, the dried spinning membrane is put in a tubular furnace, pre-oxidation and carbonization are conducted in the air, the carbonized material is immersed in an alkali solution, a carbon material is flushed with the deionized water to be neutral after soaking, and drying is performed to obtain the adsorbent.The adsorbent can simultaneously and effectively remove the trace phosphorus and the organic matter and is used in the field of carbon adsorption materials.

The invention discloses a microporous molecular sieve loaded bimetallic material for removing nitrogen oxides in diesel vehicle tail gas at low temperature, a preparation method and application thereof. The method comprises the following steps: (1) pre-treating a commercial small-pore molecular sieve H-SSZ-13; (2) uniformly loading a Pd component on the surface of the treated molecular sieve in anion exchange or impregnation manner to prepare a Pd-based single-component molecular sieve system; and (3) doping a second component Ce into the Pd-SSZ-13 system by using an ion exchange means to prepare the bimetallic supported molecular sieve PNA system. According to the method, more NOx adsorption sites can be provided, the NOx adsorption efficiency of the PNA system at a low temperature can be improved, and the poisoning resistance of the molecular sieve type PNA system can be effectively improved, so that efficient removal of NOx at a low temperature can be effectively realized, and themethod can be widely applied to the field of atmospheric pollution treatment.

The invention discloses a novel harmful gas adsorbing particle, and a preparation method thereof. The novel harmful gas adsorbing particle comprises, by weight, 100 parts of calcium silicate powder, 0.5 to 3 parts of a photocatalysis nanometer powder material, 2 to 20 parts of a modifying agent, 5 to 20 parts of a coagulant, and 3 to 8 parts of a wetting agent. The preparation method comprises following steps: the raw materials are added successively, and an obtained mixture is subjected to granulation, screening, and drying. The novel harmful gas adsorbing particle is capable of maintaining the porous performance of microcellular calcium silicate, is fine in pore structure development, large in specific surface area, excellent in nanometer performance, and high in absorption capacity; the high porosity structure and the nanometer sheep structure are capable of improving the absorption capacity, and excellent absorption effect onaldehydes, benzenes, and a plurality of harmful gas are achieved.

The invention generally relates to the technical field of environmental functional materials and water treatment, and provides a porous biochar/zinc ferrite composite material; porous biochar serves as a matrix, magnetic zinc ferrite particles are loaded on the surface, and the particle size of the magnetic zinc ferrite particles is 50-400 nm; the mass ratio of the porous biochar to the zinc ferrite nanoparticles is (1:1) to (1:2); the specific surface area of the porous biochar is 1000-1200 m<2>*g<-1>, the pore volume is 0.40-0.50 cm<3>*g<-1>, and the pore diameter is 3.00-3.50 nm. Crop strawis used as a raw material for preparing the porous biochar, ZnCl2 analytically pure and FeCl3.6H2O analytically pure are used for preparing zinc ferrite, nitrilotriacetic acid is used for modification in the compounding process of the zinc ferrite and the porous biochar, and the obtained porous biochar/zinc ferrite composite material can be used for adsorbing heavy metals in water and enhancing the adsorption effect of the zinc ferrite; and an adsorbing material can be recycled by magnetic separation.

The invention discloses a hydrophobic nanogel and a preparation method thereof. The hydrophobic nanogel adopts polyglycidyl methacrylate as a framework, has a particle size of 10-250 nm, a Zeta potential of -40 to -50 mV and a dispersion index of 0.1-0.2, and has a structure containing a hydrophobic glyceride group and a highly-active epoxy group structure, represented by formula (I), and each ofm and n in the formula (I) is an integer greater than zero. The novel hydrophobic nanogel has the dual characteristics of a hydrogel and a nanomaterial, has the advantages of small size, stable dispersion, uniform distribution and large specific surface area, and can be combined with other biochemical separation media to increase internal adsorption sites in the media in order to increase the adsorption amount; and the polyglycidyl methacrylate and other polymer materials with good biocompatibility are used, so the nanogel is highly safe.

The invention provides a refrigerator. The refrigerator comprises a shell and a partition plate assembly, wherein an opened hollow cavity structure is arranged at one end of the shell, and a hollow cavity is divided into a refrigerating chamber, a soft freezing chamber and a freezing chamber; the partition plate assembly is arranged in the soft freezing chamber, located in an installing cavity inthe top of the soft freezing chamber and used for variable temperature adjustment of the soft freezing chamber. The refrigerator is provided with the refrigerating chamber, the soft freezing chamber and the freezing chamber and provides multiple choices for a user; furthermore, the partition plate assembly is arranged at the top of the soft freezing chamber, the variable temperature adjustment ofthe soft freezing chamber is achieved through the heat insulation performance of the partition plate assembly, and when no food is stored in the soft freezing chamber, the refrigeration of the soft freezing chamber can be finished. Compared with the prior art, the variable temperature adjustment of the soft freezing chamber can be achieved, the refrigerating device can be turned off when no food is stored in the soft freezing chamber, and the effects of energy conservation and emission reduction are achieved while use experience is improved.

The invention discloses a processing technology of Enteromorpha used for sewage treatment, comprising the following steps: (1) Enteromorpha pretreatment (2) pickling (3) anticorrosion treatment (4) alkalization treatment (5) immobilization treatment (6) Post-treatment, Enteromorpha after the process of the present invention has better filtering effect and adsorption performance, and large adsorption capacity, as an adsorption material in the sewage treatment system, it can effectively remove heavy metal ions and organic pollution in sewage It can remove pollutants and inorganic pollutants, purify water quality, and greatly improve the anti-corrosion performance. It can be replaced regularly, and will not cause secondary pollution due to the corruption of Enteromorpha.

The invention discloses a method for preparing magnetic biomass charcoal from potamogeton crispus and application thereof. The method comprises the following steps: 1, cleaning, drying and smashing potamogeton crispus and putting into a crucible, compacting potamogeton crispus powder to fill the crucible, covering the crucible with a crucible cover, and then using aluminum-foil paper for wrappingand sealing the crucible; putting the wrapped crucible into a muffle furnace, carrying out constant-temperature pyrolysis at 300-500 DEG C for 1 hour, and carrying out post-treatment to obtain potamogeton crispus biomass charcoal; 2, putting the potamogeton crispus biomass charcoal into a suction flask, connecting one end of the potamogeton crispus biomass charcoal into a vacuum pump, connecting the other end of the potamogeton crispus biomass charcoal into a beaker filled with a Fe < 3 + > solution, starting a vacuum pump to pump out air in pores of potamogeton crispus biomass charcoal powder, and closing the vacuum pump to suck the Fe < 3 + > solution into the suction flask; transferring the mixture in the suction flask into a three-neck flask, and adding a Fe < 2 + > solution; and carrying out constant-temperature magnetic stirring under a nitrogen condition, dropwise adding an alkaline solution until the pH value is equal to 10-11, and reacting to obtain the magnetic potamogeton crispus biomass charcoal. The method has the advantages of energy conservation, environmental protection, better environmental benefit and economic benefit and the like.

The invention provides a high-sensitivity nitrite ion electrode based on poly(3,4-ethylenedioxythiophene). The high-sensitivity nitrite ion electrode sequentially comprises a metal wire, a conductive poly(3,4-ethylenedioxythiophene) film, a nitrite ion sensitive film and a glass tube from inside to outside. The nitrite ion sensitive film comprises a 3,4-ethylenedioxythiophene film - styrene sulfonic acid copolymer. The 3,4-ethylenedioxythiophene film - styrene sulfonic acid copolymer is adopted to serve as a film-forming material of the sensitive film and replace PVC in the prior art, has good compatibility with conductive poly(3,4-ethylenedioxythiophene) of an adjacent layer, improves interlayer acting force and reduces interlayer signal transmission loss, so that the sensitivity of the ion electrode is further enhanced, and the lower limit of the electrode detection concentration is as low as 108 mol/L. Adsorption points of the copolymer are increased, the ion adsorption capability of the copolymer is improved, and the detection range of nitrite ions is expanded.