5 results about "Ceric ammonium nitrate" patented technology

This invention discloses a cerium-doped diatom-based silicon-carbon anode material, its preparation method, and its application, belonging to the technical field of lithium battery anode materials and their preparation. Using a diatom shell as a framework, a bio-doping method is employed. When the diatoms grow to the early logarithmic phase in a culture medium, cerium ammonium nitrate is added to the diatom culture medium for co-cultivation. The co-cultivated diatom shells are then calcined at high temperature to obtain the cerium-doped diatom-based silicon-carbon anode material. This invention employs a two-stage cultivation strategy, introducing cerium ammonium nitrate after the diatoms have reached the early logarithmic phase to avoid toxic inhibition during the growth-sensitive period. Simultaneously, it utilizes the efficient absorption and doping capabilities of diatoms during the active biomineralization phase, achieving a balance between high doping efficiency and structural integrity. This method utilizes the biomineralization capabilities of diatoms to achieve uniform elemental doping, resulting in a simple, low-cost, and environmentally friendly process; providing a new approach for the development of high-performance silicon-carbon anode materials.

This invention belongs to the field of anti-corrosion coating technology and discloses a thin-layer high-barrier heavy-duty anti-corrosion coating and its preparation method. The coating comprises component A and component B, wherein component A is composed of fluorocarbon-polyurethane hybrid resin, glass flakes, cerium-doped carbon nitride, additives, and solvent, and component B is a curing agent and a diluent. The fluorocarbon-polyurethane hybrid resin is prepared by reacting fluorocarbon resin with a mixed isocyanate, which is a compound of aliphatic and aromatic isocyanates; the cerium-doped carbon nitride is obtained by calcining urea followed by secondary calcination with cerium ammonium nitrate. This invention, through resin hybrid design and synergistic use of functional fillers, achieves excellent acid and alkali corrosion resistance and long-term barrier effect under thin-layer conditions. The coating maintains surface integrity and stable adhesion even after immersion in corrosive media, and is easy to apply and low in cost, making it suitable for steel structure protection in harsh corrosive environments.

This invention discloses a rust-proof steel wire and its preparation process, belonging to the field of steel wire post-treatment technology. The rust-proof steel wire comprises a copper-plated steel wire and a passivation layer on the surface of the copper-plated steel wire. The passivation layer is made from a passivation solution, which comprises the following raw materials in the indicated mass fractions: 4-8% vegetable fatty acids, 2-6% boric acid, 1-3% cerium ammonium nitrate, 2-8% polyepoxysuccinic acid terpolymer, 1-3% polyacrylamide, 0.5-2% disodium ethylenediaminetetraacetate, 4-6% aminosilane coupling agent, and the balance being deionized water. The polyepoxysuccinic acid terpolymer contains thiourea molecules in its side chains. The rust-proof steel wire, through the combination of raw materials in the passivation solution, obtains a passivation layer that is a composite of organic and inorganic substances, thereby constructing a dual physical barrier that provides long-term rust protection for the steel wire. Simultaneously, the passivation layer also has a certain coupling effect, which can improve the bonding force between the rust-proof steel wire and the plastic matrix, enhancing the adaptability of the rust-proof steel wire in plastic hoses.

The present application belongs to the technical field of environment-friendly hydrogel slow-release fertilizer, and discloses an environment-friendly humic acid (salt) embedding hydrogel slow-release fertilizer and a preparation method thereof. In a reaction medium of water, original starch, monomer, embedding substance of humic acid or salt, double initiator and crosslinking agent are subjected to graft polymerization reaction in a reaction extruder to obtain the environment-friendly humic acid (salt) embedding hydrogel slow-release fertilizer. The double initiator is cerium ammonium nitrate and persulfate. The monomer is one or more than one of acrylamide and acrylic acid monomer. The preparation method is a reaction extrusion method combined with a double initiation system. The reaction only needs about 10 minutes, the grafting efficiency and polymerization efficiency in the chemical reaction are improved, and it is beneficial to form a complete and dense three-dimensional network structure. The prepared slow-release fertilizer has higher humic acid (salt) loading capacity, higher gel strength and good slow-release performance, and the slow-release period is up to 70 days or more.

A method for preparing a rare-earth-containing heterojunction catalyst material CeO2 / Sm-MOF involves dissolving samarium nitrate hexahydrate and H4TBAPy in a composite solvent to form a mixed solution, followed by hydrothermal reaction to obtain Sm-MOF. Cerium ammonium nitrate and Sm-MOF are then dissolved in an aqueous solution of γ-valerolactone, followed by the addition of H2O2 and triethanolamine to form a mixed solution. The mixture is magnetically stirred at 45-55°C for 2-3 hours, followed by hydrothermal reaction and calcination. This invention improves the thermal stability of Sm-MOF by using cerium ammonium nitrate as the Ce source and combining a two-step heat treatment process. This effectively enhances the bonding force and distribution uniformity of CeO2 on the Sm-MOF surface, improving the catalytic activity and cycle stability of CeO2 / Sm-MOF. It exhibits excellent degradation efficiency for MB, RhB, ATZ, CIP, etc., and demonstrates excellent cycle stability during cycling.