34results about How to "Adjustable specific surface area" patented technology

The invention provides a preparation method of carbon aerogel fibers. The method comprises the following steps that a spinning stock solution is prepared; a coagulating bath is prepared; the spinning stock solution is added into the coagulating bath, wet spinning is conducted, and cellulose gel fibers are obtained; the cellulose gel fibers are subjected to winding and immersed into an ageing solution for normal temperature ageing for 15 min to 1 h, the aged cellulose gel fibers are washed to be neutral with deionized water, solvent replacement is conducted with deionized water or ethyl alcohol or tert butyl alcohol, drying is conducted, and cellulose aerogel fibers are obtained; the cellulose aerogel fibers are put into a tubular furnace to be carbonized in a nitrogen environment, and the carbon aerogel fibers are obtained. The preparation method of the carbon aerogel fibers has the advantages that the raw materials are wide in resource, low in price and easy to obtain, the preparation process is simple, the spinnability is good, and the method is green and environmentally friendly, and the problem that a carbon aerogel cannot form fibers easily is solved.

The invention provides a continuous cellulose aerogel fiber and a preparation method thereof. The preparation method comprises the following steps: dispersing cellulose into a dispersing agent so as to obtain a spinning stock solution; extruding the spinning stock solution into a coagulating bath for wet-method spinning so as to obtain cellulose aerogel fiber; winding the cellulose aerogel fiber in the coagulating bath, and soaking into an aging liquid for aging; washing the aged cellulose aerogel fiber till the pH is neutral, and drying, so as to obtain the continuous cellulose aerogel fiber. The preparation method provided by the invention has the characteristics that raw materials are cheap and easy to obtain, the preparation process is simple, green and pollution-free, the continuous cellulose aerogel fiber is good is spinnability, and the problem that cellulose aerogel is hard to spin into fiber is solved. The diameter of the cellulose aerogel fiber provided by the invention is smaller than 120 [mu]m, the cellulose aerogel fiber has the characteristics of high specific surface area (greater than or equal to 88m<2>/g), high porosity (greater than or equal to 85%), and low density (less than or equal to 0.2/cm<3>), meanwhile the fiber specific surface area can be adjusted, and the cellulose aerogel fiber can be used in fields such as functional clothes, sensing, catalyst loading and adsorption filtration, cosmetics and biological treatment.

The invention discloses a preparation method for a lithium battery anode material by taking a metal organic frame as a template. The preparation method of the lithium battery anode material comprises the steps of 1, synthesizing organic ligand 4, 4 Hopybz; 2, synthesizing a Pb-MOF material, weighing Pb(NO3)2 and the ligand 4, 4 Hopybz, dissolving the Pb(NO3)2 and the ligand 4, 4 Hopybz into solvent, carrying out heating and reacting in a reactor and cooling to a room temperature after reaction, thereby obtaining the Pb-MOF material; 3, preparing the lithium battery anode material, and heating to activate the Pb-MOF obtained in the step 2, thereby obtaining the lithium battery anode material. Compared with the prior art, the method has the advantages that a porous metal organic frame complex is synthesized, the complex is further activated, the complex is directly applied to a lithium battery as the anode material of the lithium battery, the structure and specific surface area of the metal organic frame are adjustable, and the prepared lithium battery anode material has good electrochemical performance.

The invention discloses a bacterial cellulose membrane/porous carbon adsorbent and preparation thereof. The bacterial cellulose membrane/porous carbon adsorbent is prepared by taking a bacterial cellulose membrane as a matrix, taking different saccharides as carbon sources and using a hydrothermal carbonization method; due to the anchoring function of a large number of hydroxyls on the surface of the bacterial cellulose, the porous carbon can be preferably dispersed in the bacterial cellulose membrane and different nano pore diameters can be obtained by adjusting the growth process of the bacterial cellulose membrane. The adsorbent combines the filtration of the nano pore diameters of the membrane and the adsorption of the porous carbon, is used for adsorbing and dispelling PM2.5 smoke and poisonous gas and has the advantages f being environmentally friendly and high in efficiency.

The invention discloses a method for preparing nitrogen-doped nanoporous carbon microspheres by using sepia as a raw material. The method comprises: A, taking live squid, taking out ink sac, extrudingink, carrying out centrifuging grading, and taking the black pigment of the precipitate; B, pre-carbonizing the precipitate obtained in the step A, and naturally cooling; C, placing the pre-carbonized product obtained in the step B in a potassium hydroxide aqueous solution, and completely activating; D, carbonizing the activated product obtained in the step C again, and naturally cooling; E, soaking in a hydrochloric acid solution; and F, carrying out suction filtration cleaning with pure water, and drying to obtain the monodisperse nitrogen atom-doped nanoporous carbon microspheres. According to the present invention, the method can improve the deficiencies in the prior art, and is simple, and the product has high performance price ratio.

The invention discloses a method for preparing a basic nickel silicate catalyst from silicon-containing industrial solid waste, and belongs to the technical field of solid waste resource utilization.Pretreated silicon-containing industrial solid waste is adopted as a silicon source, a silicon-based precursor and a nickel-based precursor are added at the same time, three-dimensional basic nickel silicate is synthesized in a one-step hydrothermal mode, and the defect that a step-by-step synthesis method is tedious in step is overcome. Silicon-containing industrial solid waste is adopted as a silicon source, the nickel silicate material is prepared through a one-step hydrothermal method, the process is simple, operation is easy and convenient, the preparation period is short, and a special reaction container is not needed. The used raw materials are relatively low in cost, high-valued utilization of wastes is realized, and the method is suitable for batch production. The basic nickel silicate catalyst obtained by the invention has the advantages of high specific surface area, high mechanical strength, high activity, high stability, good thermal stability and low cost, and is suitablefor high-temperature catalytic reaction after reduction.

The invention relates to a method for preparing high-specific-surface-area continuous SiO2 porous fiber through a natural drying method. The method includes the steps of preparing a spinning solution from silicate or silanol sol, adding the spinning solution to an acid solution coagulating bath, conducting reaction and wet spinning to obtain orthosilicic acid/silicate fiber, winding the orthosilicic acid/silicate fiber, ageing the orthosilicic acid/silicate fiber at the normal temperature, washing the orthosilicic acid/silicate fiber with deionized water to be neutral, conducting solvent replacement through ethyl alcohol, and conducting natural drying. The method has the advantages that devices are simple, raw materials are low in price and easy to obtain, the reaction process is simple and spinnability is good, the problem that inorganic porous fiber can hardly be spun into fiber is solved, and meanwhile drying of the porous fiber is achieved through natural drying. The prepared SiO2 porous fiber has abundant pores, an ultrahigh specific surface area, high temperature resistance and chemical corrosion resistance, the specific surface area of the fiber can be adjusted, and the method can be used for the fields of catalyst carriers, adsorption filtration and the like.

The invention relates to a method for preparing continuous hollow SiO2 porous fibers through non-coaxial spinning. The method comprises steps as follows: a spinning solution is prepared from silicate; a strong acid solution is added to a coagulating basin to serve as a coagulating bath; the spinning solution is put in the coagulating bath, has a reaction and performs wet spinning, hollow orthosilicic acid/silicate fibers are obtained and subjected to winding, and the fibers after winding are immersed in an ageing solution for ageing; the fibers are washed to be neutral with deionized water after ageing, solutions in the fibers are replaced through ethanol, the fibers are dried, and the continuous hollow SiO2 porous fibers are obtained. According to the method, equipment is simple, raw materials are cheap and easy to obtain, the reaction process is simple, and the spinnability is good. The hollow inorganic SiO2 porous fibers prepared with the method have rich pores, ultrahigh specific surface area and high temperature resistance and chemical corrosion resistance, meanwhile, the specific surface area of the fibers can be adjusted, and the continuous hollow SiO2 porous fibers have more advantages in the fields such as catalysis, adsorption, filtration and the like than ordinary porous fibers.