9 results about "Squaric acid" patented technology

The invention relates to the technical field of photocatalysis, in particular to a Yb < 3 + > / Er < 3 + > co-doped full-spectrum response Ti-MOF / BiOBr S type heterojunction as well as a preparation method and application thereof. The invention provides an S-type heterojunction composite catalyst, which is mainly prepared from squaric acid, a titanium source, Yb < 3 + > and Er < 3 + > doped BiOBr nanosheets, and the mass ratio of the BiOBr nanosheets in the catalyst is 60%-95%. The high specific surface area of the IEF-11 is beneficial to pollutant enrichment, and the addition of the nanosheet can expand the photoresponse range and can be used as an electron trapping agent, so that the sunlight utilization rate and the photocatalytic performance are improved; the constructed S-type heterojunction can promote separation of photon-generated carriers, and meanwhile, the strong oxidation-reduction capacity of a composite system is reserved. The catalyst has the capabilities of full-spectrum response, efficient degradation of organic pollutants and inactivation of microorganisms, and has a wide application prospect.

The invention belongs to the technical field of enzyme composite materials and biological catalysis, and particularly relates to an immobilized enzyme catalyst based on a copper-based metal organic framework as well as a preparation method and application of the immobilized enzyme catalyst. Cytochrome c (Cyt c), squaric acid and copper ions are uniformly mixed through an in-situ co-precipitation method, in-situ embedding of Cyt c is achieved through hydrogen bonds and coordinate bonds generated in the Cu-MOF forming process, the Cyt c-coated Cu-MOF compound enzyme catalyst is prepared, a constructed Cu-MOF carrier is of a mesoporous structure, a stable protective microenvironment can be provided for Cyt c, enzyme leaching is effectively inhibited, and the catalyst has the advantages of being capable of being used for preparing the complex enzyme catalyst. The operation stability and the environmental tolerance are remarkably improved, and the catalyst shows efficient catalytic degradability in organic pollutants including phenolic compounds and dyes, and has wide application prospects in the fields of biological catalysis and the like. Moreover, the method is mild in condition, simple and convenient to operate, low in cost and easy for large-scale production.

The invention relates to an aromatic polymer material, a preparation method thereof and application of the aromatic polymer material as a fluorescence sensor in active carbonyl compound detection, and belongs to the field of fluorescence sensing. The preparation method comprises the following steps: by taking squaric acid (SA) and 1, 3, 5-tri (4-aminophenyl) benzene (TAPB) as monomers, carrying out solvothermal condensation reaction in a water-phase solvent to prepare the aromatic polymer material SA-TAPB. The polymer material presents a regular microsphere morphology and has good fluorescence performance, the invention also discloses application of the material in the field of fluorescence sensing, especially detection of active carbonyl compounds, and the material has high specific recognition capability on active carbonyl compounds such as formaldehyde (FA), glyoxal (Gly), acrolein (MGO) and the like in various analytes, and has good application prospects. High-selectivity and high-sensitivity fluorescent sensing of the compounds can be realized, and the preparation method is simple, convenient and efficient and has extremely high practicability.

This invention relates to a method for synthesizing squaric acid, the method comprising the following steps: (1) reacting alkyl vinyl ether, trichloroacetyl chloride, and zinc to obtain 2,2-dichloro-3-alkoxycyclobutanone; (2) subjecting 2,2-dichloro-3-alkoxycyclobutanone to chlorination with chlorine to obtain 2,2,4,4-tetrachloro-3-alkoxycyclobutanone; (3) subjecting 2,2,4,4-tetrachloro-3-alkoxycyclobutanone to elimination reaction with a base to obtain 2,4,4-trichloro-3-alkoxycyclobuten-1-one; and (4) subjecting 2,4,4-trichloro-3-alkoxycyclobuten-1-one to hydrolysis to obtain the squaric acid. The synthesis method provided by this invention avoids the use of the prohibited raw material perchloro-1,3-butadiene and has lower energy consumption, meeting the needs of green and clean production.

The invention belongs to the technical field of photocatalysis, and particularly relates to a porous squaric acid-phenylenediamine polymer and a preparation method and application thereof.The preparation method comprises the steps that squaric acid and phenylenediamine are subjected to a solvothermal reaction to form a Schiff base polymer, and the porous squaric acid-phenylenediamine polymer is obtained; the phenylenediamine is o-phenylenediamine or m-phenylenediamine. The prepared porous squaric acid-phenylenediamine polymer serves as a catalyst, the light absorption range of the porous squaric acid-phenylenediamine polymer is widened to the infrared range, and due to effective electron and hole regulation and control, H2O2 can be efficiently produced in a visible light source and pure water without the existence of a sacrificial agent. And the produced H2O2 is further disinfected and sterilized, and pollutants are removed through an in-situ Fenton reaction, so that relatively good application potential is shown.

The application provides a preparation method of a sodium iron phosphate pyrophosphate positive electrode material, a positive electrode material and an electrochemical device. The preparation method comprises the following steps: mixing a sodium source, an iron source, a phosphorus source and a first carbon source, performing one-time grinding and drying, and then performing one-time sintering to obtain a sodium iron phosphate pyrophosphate precursor; dispersing the sodium iron phosphate pyrophosphate precursor, the first carbon source and an organic acid in a solvent, performing two-time grinding, and then drying to obtain a powder, wherein the organic acid comprises at least one of glyoxylic acid, phthalic acid, maleic acid, malic acid, oxalic acid, citric acid, acetic acid, squaric acid and tartaric acid; and performing two-time sintering on the powder to obtain the sodium iron phosphate pyrophosphate positive electrode material. The sodium iron phosphate pyrophosphate positive electrode material prepared by the preparation method has the advantages of low surface residual alkali content, good air stability and excellent electrochemical performance.

The application discloses a preparation method of a transition metal selenide catalyst based on a Co-based MOF of a square acid. The Co-based MOF of the square acid is a dice-shaped square Co nanocage, and the Co-based MOF of the square acid is stable in thermodynamic properties and chemical properties. Then, the transition metal selenide catalyst is prepared by using selenium (Se) powder as a Se source and through an anion exchange method. The prepared transition metal selenide (CoSe2) has a large interface contact area, which is beneficial to exposing more surface active sites and improving catalytic activity.

Provided are a resin composition, a coated and dried product or a melt-kneaded product, an optical filter including the same, an image display device and a solid-state imaging element including the optical filter, and an octahydroxy acid compound represented by a specific formula and a method for producing the same, the resin composition containing an octahydroxy acid compound and a resin, wherein the octahydroxy acid compound includes at least one selected from octahydroxy acid compounds represented by a specific formula.

The present invention aims to provide a resin composition comprising a melt mixture of a near-infrared absorbing pigment and a resin, which can produce a molded article having good optical properties even when used in melt molding. The present invention is a resin composition comprising a melt mixture of a cyanine pigment and / or a squaryllium pigment and a resin, wherein the cyanine pigment is a compound comprising a cation formed of a cyanine structure and an anion formed of tetrakispentafluorophenylborate, wherein the cation formed of the cyanine structure has a specific structure or a specific structure at at least one end of a polymethine backbone, and the squaryllium pigment is a compound having at least one structure added to the squaric acid portion that includes a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring, or at least one structure added to the squaric acid portion that includes a nitrogen-containing conjugated system composed of a 5-membered ring and a 6-membered ring through one carbon in the conjugated system.