37results about How to "High degree of carbonation" patented technology

The invention relates to a preparing method for a doped carbon material of a super-capacitor, which comprises the following steps: mixing polyvinylidene chloride, strong base and strong polar solvent for obtaining a mixture; then grinding the mixture; after grinding, calcining the ground mixture in an inert gas; and then performing cleaning and drying for obtaining the doped carbon material. The strong base is alkaline-earth metal hydroxide, alkaline-earth metal oxide, zinc oxide, alkaline-earth metal amide, alkaline-earth metal sulfide, alkaline-earth metal nitride or alkaline-earth metal alkoxide. The strong polar solvent is N,N-Dimethylformamide, N,N-Dimethylacetamide, dimethyl sulfoxide or N-methyl pyrrolidone. The preparing method has advantages of low price and easy availability of raw material, low cost, simple preparing process, high safety and environment-friendly performance. The prepared carbon material has excellent double-layer capacitance and important popularization value.

The invention discloses a transition metal-nitrogen co-doped carbon-based composite material and a preparation method thereof. Transition metal chloride salts and nitrogen-containing organic small molecules are used as transition metal sources and carbon and nitrogen sources, and transition metals are directly obtained by a one-step method. Coordinated macrocyclic mixtures, and then carbonized to obtain transition metal-nitrogen-doped carbon-based composites, the preparation method is simple and quick, suitable for large-scale production preparation; the structure of the synthesized transition metal-nitrogen-doped carbon composites Nanosheets are produced, and the transition metals on the nanosheets exist in two forms, one is transition metal nanoparticles and the other is transition metal nitride nanoparticles; the synthesized transition metal and nitrogen-doped carbon composites have nitrogen-doped Carbon, transition metals and nitrogen atoms are coordinated and active sites with more defects and have a larger specific surface area; it is conducive to the application of transition metals and nitrogen-doped carbon-based composites in the fields of catalysis and energy storage.

The invention discloses an amphiphilic graphene quantum dot material, a preparation method thereof, fluorescent coding anti-counterfeiting ink based on the amphiphilic graphene quantum dot material and a preparation method of the fluorescent coding anti-counterfeiting ink. Hydrophobic citrate is used as a carbon source, hydrophilic amino alcohol is used as a nitrogen doping agent, and the amphiphilic graphene quantum dot material with hydrophobic ester groups and hydrophilic alcoholic hydroxyl edge groups is prepared through carbonization treatment. The prepared amphiphilic graphene quantum dot material has a high fluorescence quantum yield and good light, heat and chemical stability, and can be dispersed in various polar and non-polar solvents. Under certain conditions, the amphiphilic graphene quantum dot material can form an aggregate on the surfaces of a solution and a solid, and fluorescence emission of the amphiphilic graphene quantum dot material is changed from a single peak tomultiple peaks. The aggregation degree and aggregation state of the amphiphilic graphene quantum dot material are regulated and controlled, so that the fluorescence emission intensities of the amphiphilic graphene quantum dot material at different wavelengths are correspondingly changed, and the fluorescence coding marking based on the fluorescence intensity ratio is realized.

The present invention provides a γ-C 2 The activation modification method of S, the activation modification method, comprises the following steps: 1) according to the calcium-silicon molar ratio of 2:1, mixes the calcium raw material and the silicon raw material, then, adds the metal ion compound, mixes by ball milling, and obtains sintering raw materials; 2) mixing the sintering raw materials with 10% alcohol, pressing them into green bodies, drying, sintering, and natural cooling to obtain metal ion-doped γ-C 2 S. The present invention adopts metal ion doping firing pair γ-C 2 S was modified to prepare γ‑C with high specific surface area and high carbonization activity 2 S, and after being doped with metal ions and fired, the metal ions are enriched at the grain boundaries and replace part of the calcium ions to form a continuous solid solution. The carbonized products prepared by the activated γ-C2S have a higher degree of carbonization and resistance to carbonization. compressive strength.

The invention discloses a graphene quantum dot material with high ultraviolet absorption characteristics and lipophilicity and a preparation method of the graphene quantum dot material. The preparation method prepares the graphene quantum dot material with the high ultraviolet absorption characteristics and the lipophilic characteristics by using an ester of a polycarboxylic acid molecule as a carbon source through heat carbonization; the ester of the polycarboxylic acid molecule used in the method is in a liquid state under normal temperature or heating conditions and has a high boiling point, by using the feature, uniform carbonization of the carbon source can be realized through a simple heating manner without using any solvent, no special requirements for a heating atmosphere and carbonization pressure are needed in the solventless carbonization process, the carbonization efficiency is high, the environmental friendliness is realized, possible side reactions between the solvent andthe carbon source are prevented, the product separation and purification process is greatly simplified, and in the subsequent reaction process, a crude product can be purified only by dispersing andprecipitating treatment; and the prepared material has good lipophilicity and high ultraviolet absorption characteristics.

The invention relates to a method for preparing a heteroatom-doped carbon material at a room temperature. The method comprises the following steps: mixing a halogenated macromolecule and strong base with a strong polar solvent so as to obtain a mixture, grinding the mixture at the room temperature, and directly cleaning and drying after completion of grinding, so as to obtain the heteroatom-doped carbon material, wherein the halogenated macromolecule is polyvinylidene difluoride, polyvinylidene chloride or polyvinyl chloride, the strong base is alkali (earth) metal hydroxide, alkali (earth) metal alkoxide, alkali (earth) metal sulfide, alkali (earth) metal amides or alkali (earth) metal nitride, the strong polar solvent is N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide or nitrogen methyl pyrrolidone and the room temperature refers to 10-40 DEG C. According to the method, the raw materials are cheap and easy to obtain, the operation is simple, safety is high and the method is very suitable for industrial expanded production.

The present invention is a carbon dioxide curing prefabricated permeable concrete and a preparation method thereof. The permeable concrete consists of the following parts by mass: 55-80 parts of recycled aggregate, 7-30 parts of nickel slag sand, 18-40 parts of cementing material, 5 parts by mass ~25 parts of water, 0.01~2 parts of naphthalene-based water reducer, 0~0.02 parts of cellulose ether, and 0~0.01 parts of Wenlun rubber. The cementing material is composed of the following parts by mass: 70-90 parts of ordinary Portland cement, 5-15 parts of fly ash, 10-30 parts of steel slag, 5-15 parts of lime or lime slag, 0.02-1 part of nano-carbonate calcium composition. The invention has a simple process, fully utilizes the structural advantages of permeable concrete and the material properties of industrial by-products such as nickel slag, steel slag, and fly ash, and uses carbon dioxide curing to realize efficient, fast, and environmentally friendly production, while obtaining high-strength and high-durability permeable concrete products , which not only reduces energy consumption, but also effectively utilizes industrial tail gas, smelting waste residue and construction waste, and has good economic, environmental and social benefits.