352 results about "Metal free" patented technology

The invention discloses an environment-friendly PVC-U plastic pipe fitting and a manufacturing method thereof, and relates to the technical field of plastic waste recycling, and the environment-friendly PVC-U plastic pipe fitting is prepared from the following raw materials in parts by weight: 30-50 parts of regenerated PVC particles and 50-70 parts of raw PVC resin. Plasma-nano SiO2 co-activation is combined with a supercritical CO2 extraction technology, plasticizer residues in regenerated PVC are efficiently removed, the surface activity is improved, a multi-scale mechanical interlocking structure is constructed in cooperation with a four-level plant fiber reinforcing agent, gradient density design is combined, the ring stiffness larger than or equal to 8 kN / m < 2 > is achieved under the condition that no metal reinforcing layer exists, and the performance of the regenerated PVC is improved. Meanwhile, by utilizing the synergistic effect of maleic anhydride grafting modification and pulsed magnetic field orientation curing, the compatibility of the reclaimed material and primary resin is improved, a modulus gradient interface is formed, stress concentration is effectively relieved, the recovery rate of the waste PVC pipe is increased, and the product has the self-cleaning and electromagnetic shielding functions.

A metal-free signal cable made of at least 24 carbon rovings twisted together for use in music reproduction as a loudspeaker cable, small signal cable or bridge, which is kept free from external influences by spacers made of electromagnetically practically neutral aluminum-magnesium alloy. Even the highest-quality hi-fi systems sound significantly more energetic, clearer, more accurate, more tangible, and even more "in the room" when using my invention. Transients are much more realistic, the reproduced stage size increases significantly, the sound and positioning of the instruments involved are noticeably improved, and each individual note becomes significantly more subtle, complex, and rich in nuance. Even the smallest sound events become perceptible, which are lost with conventional solutions.

The invention relates to the field of catalysts, in particular to a preparation method and application of an alumina-loaded copper-doped graphene-like catalyst, and the preparation method comprises the following steps: step 1, dispersing biomass in deionized water to form a suspension A; step 2, adding an aluminum salt and an iron salt into the turbid liquid A to form a turbid liquid B; step 3, adding a nitrogen source into the turbid liquid B to form impregnation liquid C; step 4, pouring the steeping liquor C into a beaker filled with alumina pellets, and drying to obtain dried pellets; and 5, roasting the dried pellets in a tubular furnace, cooling to room temperature, repeatedly washing with water, and drying to obtain the catalyst. The catalyst disclosed by the invention can be used for rapidly degrading refractory organic pollutants in water within 30 minutes under the synergism of microorganisms. The catalyst provided by the invention has good stability in the process of removing organic pollutants, and almost no metal ions are released.

The invention provides a preparation method of an organic polymer photocatalyst and application of the organic polymer photocatalyst in the aspect of photocatalytic synthesis of nitric acid (HNO3) by directly taking nitrogen (N2) and oxygen (O2) as raw materials in water, and additional reagents do not need to be added. It is worthy of notice that the organic polymer photocatalyst (PyOP) shows excellent photocatalytic performance. When O2 is subjected to photocatalytic reduction, the yield of hydrogen peroxide (H2O2) reaches 10147.5 [mu] mol g <-1 > cat, and meanwhile, 672.8 [mu] mol g <-1 > cat of HNO3 can be synthesized by directly utilizing N2 and O2. The preparation method of the photocatalyst provided by the invention is simple, the raw materials are easy to obtain, the preparation cost is low, a metal-free photocatalytic platform only using H2O, N2 and O2 is constructed, and the photocatalyst is used for green and sustainable nitric acid production.

This invention belongs to the field of catalytic material preparation technology, specifically relating to a method for preparing high specific surface area pure phase α-type molybdenum carbide by hydrogen intercalation modification of MoO3 and its application, including the following steps: (1) adding MoO3 powder to hydrochloric acid and dispersing it to prepare a mixture of MoO3 and hydrochloric acid; (2) adding metal powder to the mixture in step (1) and performing pre-reduction treatment by in-situ hydrogenation of the metal and hydrochloric acid to prepare H x MoO3 precursor; (3) H prepared in step (2) x The MoO3 precursor is carbonized under a carbon source gas to obtain a pure α-type molybdenum carbide with a high specific surface area. This method is simple and effective, avoids the use of corrosive NH3 gas during carbonization, and does not require a metal as a medium, thus solving the current problem of not being able to prepare metal-free modified pure α-MoC in one step.

The invention discloses a method for electrochemical C-H deuterization of pyridine derivatives and D2O and a deuterated compound prepared by the method. The method provided by the invention comprises the following steps: under a power-on condition, a pyridine derivative, an electrolyte and D2O are subjected to an electrochemical reaction in a solvent, so that a C-H bond in the pyridine derivative is converted into a C-D bond. The invention provides a method for carrying out C4 selective C-H deuterization reaction on a simple, metal-free and acid / alkali-free pyridine derivative by using economic and convenient D2O at room temperature. The strategy has the characteristics of high efficiency and environmental friendliness, has high chemical and regioselectivity, and can provide a wide range of D compounds, such as pyridine, quinolones, N ligands and biological related compounds.

The invention belongs to the technical field of catalysts, and provides an oxygen-doped carbon nitride catalyst and a preparation method and application thereof.The preparation method comprises the steps that melamine, a hydrogen peroxide aqueous solution and acetonitrile are mixed and subjected to a hydrothermal reaction, and a precursor material is obtained; and calcining the precursor material to obtain the oxygen-doped carbon nitride catalyst. The method has the following advantages: (1) the synthesis process of the catalyst is simple, the raw materials for synthesizing the catalyst are cheap and easily available, the equipment requirement for synthesizing the catalyst is simple and convenient, and the operation is easy; and (2) the catalyst has excellent reaction catalytic performance for selective oxidation of sulfides, has good substrate adaptability, is easy to recycle and reuse, and still has high yield after being used for many times. And (3) the adaptability of photocatalytic heterogeneous oxidation to substrate expansion in drug molecules is rarely reported at present, and the invention provides an application method of a metal-free photocatalyst for efficiently and selectively oxidizing sulfide under the condition of no additional additive.

The invention relates to a coated substrate, preferably coated tool for use in manufacturing processes, such as machining processes or forming processes, comprising a coated surface, said coated surface formed by a substrate surface made of a first material (1) and a coating system, preferably an arc-PVD-deposited coating system, applied on said substrate surface, said coating system comprising an amorphous carbon film (100), wherein the amorphous carbon film (100) is a tetrahedral hydrogen-free amorphous carbon film in which the share of the sp3 bond percentages of the C—C bonds exceeds that of the sp2 bond percentages. The invention further relates to a method.

The invention discloses a zinc oxide modified silicon dioxide catalyst, a preparation method and application of the zinc oxide modified silicon dioxide catalyst in catalytic alcoholysis of waste PET (polyethylene terephthalate), zinc acetate and silicon dioxide are added into a mixed solution of water and ethanol and uniformly mixed, and a mixed reaction solution is obtained; adding a sodium hydroxide aqueous solution into the mixed reaction solution, carrying out a first reaction, and standing to obtain a suspension; and adding an L-ascorbic acid aqueous solution into the suspension, carrying out a second reaction, carrying out solid-liquid separation, and calcining the solid part in an air atmosphere to obtain the product. The prepared zinc oxide modified silicon dioxide nano material can be used as a catalyst to be applied to alcoholysis recovery of waste polyester, the product yield reaches up to 92% or above, the product selectivity is high, metal residues are avoided, the catalyst is easy to recover and can be recycled, and the application prospect is wide.

The invention discloses a self-healing high-temperature anti-oxidation carbon-ceramic composite material, belongs to the technical field of ceramic-based composite materials, and particularly relates to a method for introducing a self-healing metal-element-free high-temperature anti-oxidation ceramic matrix into a carbon fiber preform. Then introducing a resin carbon matrix and a self-healing inorganic filler through two times of vacuum impregnation and high-temperature cracking, and finally preparing the SiC matrix by adopting high-temperature siliconizing. The carbon-ceramic composite material prepared by the invention does not contain metal impurities, has a self-healing function, and has a long-life anti-oxidation function in a range of 700-1000 DEG C.

The invention provides an antibacterial finishing agent and a preparation method and application thereof, and belongs to the technical field of textile assistants, the antibacterial finishing agent comprises the following raw materials: a chitosan-phytic acid-gallic acid graft copolymer, a citric acid-chitosan oligosaccharide cross-linking agent, sodium polyglutamate, a natural surfactant and water. During application, a padding-baking process is adopted, the finishing agent is diluted into 5-20 g / L working solution, the pH is 6-6.5, two times of padding and two times of rolling are performed, pre-drying is performed for 2-3 min at the temperature of 90-100 DEG C, baking is performed for 2-3 min at the temperature of 150-160 DEG C, an antibacterial layer which is resistant to washing more than or equal to 50 times and has the antibacterial rate more than or equal to 90% can be formed on pure cotton, pure hemp, pure silk and blended fabric thereof, and the finished fabric is soft in hand feeling, free of metal residues and biodegradable.

The invention belongs to the technical field of inorganic nano materials and electro-catalysis, and particularly relates to a cobalt-based spinel oxide nano material as well as a preparation method and application thereof. The cobalt-based spinel oxide nano material comprises a conductive substrate and cobalt-based spinel oxide grown on the surface of the conductive substrate, the molecular formula of the cobalt-based spinel oxide is MxCo1-xO4, and M is transition metal or P-region metal and is selected from one or more of titanium, vanadium, chromium, manganese, iron, nickel, aluminum, cerium and neodymium. Multiple metal elements are doped into a cobaltosic oxide lattice, and the intrinsic structure of spinel is not changed by metal doping. Multiple metal elements are highly uniformly dispersed in the material, so that active sites are comprehensively regulated and controlled, the material shows excellent thermodynamic and chemical stability under harsh conditions of high temperature, large current, concentrated alkali and the like, is suitable for various electrolysis modes, has no metal dissolution risk in long-term operation, can effectively avoid the problems of membrane poisoning and membrane degradation, and has good application prospects. Wide application prospects are shown.

The invention discloses an application of a SiC QDs catalyst in a photocatalytic benzylamine oxidative coupling reaction. The catalyst takes SiC as a raw material. The preparation method specifically comprises the following steps: dispersing SiC in a hydrofluoric acid-nitric acid mixed aqueous solution, heating to 100 DEG C in a hydrothermal kettle, maintaining for 1-6 hours, taking out, cooling to room temperature, diluting with deionized water, carrying out ultrasonic oscillation, carrying out centrifugal acid removal to obtain neutral large particles, dispersing into deionized water, carrying out ultrasonic treatment, centrifuging, taking supernatant, and carrying out freeze drying treatment to obtain the SiC-based composite material. The SiC QDs catalyst is obtained. By applying the SiC QDs catalyst, the benzylamine can be efficiently subjected to photocatalytic oxidative coupling in an air atmosphere. Compared with the traditional metal photocatalyst, the metal-free nano photocatalyst prepared by the method has the advantage that the catalyst cost is greatly reduced.

The invention discloses a synthesis method of an oxazole derivative, and belongs to the technical field of chemical synthesis. The oxazole derivative is synthesized from a ketone ester compound and thiourea through a one-pot method, the required raw materials are cheap and easy to obtain, the experimental operation is simple, the reaction condition is mild, a metal catalyst and other reagents are not needed, and the defects that a metal catalysis synthesis method is used, for example, the catalyst is high in price, the reaction synthesis route steps are many, and the synthesis cost is low are overcome. The method has the advantages of mild reaction conditions, low reaction rate, unstable intermediate, low yield and the like, bypasses most complex synthesis steps of a metal-free catalytic synthesis method, and develops a simple, efficient, green and environment-friendly way for synthesizing the oxazole derivative. Under mild conditions, ketone ester substrates with different substituent groups have very strong compatibility, and a new green synthesis way is provided for synthesis of substituted oxazole.

The invention discloses a method for synthesizing a polysubstituted trifluoromethyl olefin compound from gem-difluoroallyl alcohol. The preparation method comprises the following steps: in a nitrogen (N2) atmosphere, sequentially adding a gem-difluoroallyl alcohol (R1R2OHCR3C = CF2) compound, acetic anhydride (Ac2O), a solvent dichloromethane (DCM) and a fluorine source pyridine hydrofluoride (Py.9HF) reagent into a 10mL Schlenk tube to obtain a mixture, stirring the mixture at room temperature (rt) until the reaction is finished, filtering, washing and drying to obtain the compound. A crude product obtained by the reaction is subjected to silica gel column chromatography separation to obtain the high-selectivity polysubstituted trifluoromethyl olefin compound. The preparation method disclosed by the invention can be carried out under mild conditions and is simple and convenient to operate, most of the adopted raw materials are simple and easily available or commercialized reagents, the reaction raw materials are easily available, the yield of the target product is high, the functional group compatibility of the product is good, and the application range of a substrate is relatively wide; the obtained polysubstituted trifluoromethyl olefin compound contains a plurality of functional groups such as trifluoromethyl, olefin and the like. The method provides a more efficient and safer new strategy for synthesizing the polysubstituted trifluoromethyl olefin under mild conditions, particularly, metal participation is avoided, a new opportunity is provided for green medicine synthesis, and the method is predicted to have wide application prospects in the fields of medicine research and development, natural product derivative synthesis, life science and the like.

The invention relates to the technical field of wall construction, and discloses a technological construction method of a metal facing and thermal insulation layer composite wall, which comprises the following steps: selecting a thermal insulation layer material: adopting a composite thermal insulation material with low thermal conductivity, good waterproofness and higher toughness, such as high-performance polyurethane foam or polystyrene foam, so that the thermal insulation performance is better; by optimizing the material of the thermal insulation layer and selecting the metal veneer, the thermal insulation performance of the wall body is greatly improved, the thermal bridge effect can be effectively reduced, the temperature stability of a building in different seasons is ensured, and therefore the energy consumption of an air conditioner and heating is reduced, and the energy-saving effect is achieved. And secondly, a metal-contact-free design and a floating connection mode are adopted, so that the problems of thermal bridge and structural deformation are effectively eliminated, and the overall thermal insulation performance and crack resistance of the wall body are improved. In addition, due to the built-in damp-proof layer and the waterproof design, the heat preservation layer is prevented from being affected with damp, the service life of the wall is prolonged, and the risks of corrosion and mildew are reduced.

The present invention relates to a method for achieving efficient electrocatalytic hydrogenation using a metal-free heterocyclic molecular catalyst. The method comprises using a five-membered or six-membered heterocyclic organic compound as the metal-free molecular catalyst, assembling an electrolytic cell using a gas diffusion electrode loaded with the metal-free molecular catalyst as the cathode and a corresponding anode, and an anion exchange membrane (or proton exchange membrane) as the cathode and anode separator, to perform the electrocatalytic semi-hydrogenation of alkynes. The method achieves activity and selectivity comparable to or even exceeding that of conventional metal catalysts during the electrocatalytic hydrogenation process.

The application belongs to the field of medicine synthesis, and particularly relates to a preparation method of mesopram racemate. First, 1-(4-methoxy-3-propoxyphenyl) ethan-1-one, methyl triphenylphosphonium bromide and alkali are reacted in a solvent under inert gas protection to obtain a styrene intermediate I; then the intermediate I, a BocNCl2 reagent and an alkali reagent are reacted in a solvent to generate the mesopram racemate. The method provided by the application has the advantages of short steps, low cost, no metal residue and mild reaction conditions, and is suitable for industrial production.

The invention belongs to the technical field of glycine preparation, and particularly discloses a preparation method of glycine. The method comprises the following steps: controlling the reaction temperature, efficiently synthesizing ammonium chloroacetate from chloroacetic acid and liquid ammonia in a reactor, carrying out catalytic ammonolysis on the ammonium chloroacetate and ammonia gas in a reactor filled with a solid catalyst to realize continuity and reinforcement of the process, and carrying out alcohol precipitation crystallization, separation and purification to obtain glycine. The solid catalyst provided by the invention has the advantages of simple preparation, reproducibility, long service life, no metal pollution, easily available raw materials, controllable cost, long-acting cyclic utilization, high efficiency, simple recovery and the like; the method for preparing glycine by using the solid catalyst solves the problems of high consumption, high recovery cost, low production and purification efficiency and pollution caused by the traditional catalyst, and is a key technology for green and low-cost industrial production of glycine.

This invention discloses a method for preparing a metal-doped anode material with high closed-pore ratio, comprising the following steps: pre-oxidation, liquid-phase coating, isostatic pressing, metal doping, and carbonization. By using glucose to liquid-phase coat pre-oxidized biomass char, followed by isostatic pressing to form a dense and uniform composite carbon framework, the pores are predominantly closed pores of 0.4-2 nm, and the carbon layer is tightly bonded to the matrix without cracks. Furthermore, by gas-phase doping with zinc, zinc is uniformly dispersed in the form of single atoms / clusters and embedded in the carbon lattice, forming a unique Zn-C coordination structure without metal particle agglomeration defects. Simultaneously, the high temperature of 1400-1600℃ promotes the migration of zinc atoms into the carbon lattice depth, improving the microcrystallinity of the carbon material while retaining sodium storage active sites, resulting in stronger structural stability and ultimately achieving a high closed-pore ratio, thereby improving the capacity and rate performance of the anode material.

The invention discloses a novel metal-free iodine-based binary catalyst system, belongs to the technical field of organic catalysis and high polymer materials, and is characterized in that an iodine-based charge transfer compound composed of I2, tetrabutylammonium acetate (TBAAc) and other quaternary ammonium salts catalyzes and oxidizes heterobutane and cyclic anhydride for controlled alternate ring opening copolymerization. In addition, the method has been effectively applied to ring-opening copolymerization by combining an epoxide and a cyclic anhydride. The catalyst system in the preparation method disclosed by the invention has the advantages of low cost, easiness in obtaining, low potential toxicity and biodegradability, and has a great practical application value.

The invention relates to an HHOF-TGU307 enhanced acrylic acid adhesive as well as a preparation method and application thereof, and belongs to the technical field of macromolecular functional materials. Aiming at the problem that the existing acrylic acid adhesive is difficult to meet the high-performance requirement in the aspects of bonding strength and mechanical property, and particularly the defects of insufficient bonding strength, easy aging, interface failure and the like in the emerging application fields of new energy and the like, HOF-TGU307 (hydrogen bond organic framework) is introduced into an adhesive system; the cohesive force and the adhesion capacity with a base material are obviously improved. The HOF-TGU307 material is a novel crystalline organic porous material with high specific surface area, high crystallinity and adjustable aperture, the HOF-TGU307 material shows unique solution processability and easy regeneration due to reversibility and flexibility of hydrogen bonds, and the HOF-TGU307 material has good biocompatibility and low cytotoxicity due to the metal-free characteristic; the characteristics enable the HOF to become a new platform of functional materials. The adhesive is formed by polymerization of two acrylic monomers in an ethanol solution through ultraviolet initiation, the process is simple and environment-friendly, and the obtained product has good storage and transportation stability. Performance tests show that the bonding strength of the adhesive on a PMMA (polymethyl methacrylate) base material can reach 1.36 MPa, and Fourier infrared spectroscopy and scanning electron microscope analysis verify good compatibility and dispersion state between HOF-TGU307 crystals and a polymer matrix. The adhesive provided by the invention has wide application prospects in the fields of structural bonding, photoelectric materials, automobiles, new energy and the like.

The present invention relates to an aggregation-induced luminescence dust suppressant based on thiazolothiazole-bridged imidazole, belonging to the technical field of dust suppressants. The compound is represented by the following formula I: wherein R is selected from H, CH3 or CH3(CH2) n , n is 1 to 17; X is selected from Cl, Br, I, F, CH3COO, CF3COO, CF3SO2, (CF3SO2)N, SbF6, BF4, B(C6F6)4, or C4F9. The present invention uses an aggregation-induced luminescence dust suppressant based on thiazolothiazole-bridged imidazole as a dust suppressant for railway coal transportation and sprays it on the coal surface. The luminescent material in the dust suppressant can emit fluorescence under ultraviolet light, achieving long-distance visibility to the naked eye. It also exhibits good water solubility and biocompatibility, a high boiling point, high luminescence intensity, no metal ions, low toxicity, simple synthesis, and low price. It can be well applied in railway coal transportation and achieve remote detection.

The invention relates to the technical field of organic chemistry, in particular to a method for synthesizing a benzothiophene coupling product through a non-metal-participated anchoring-migration strategy. The method comprises the following steps: taking a benzothiophene compound or a benzothiophene sulfoxide compound as a reaction substrate, mixing the reaction substrate with an aryl nucleophilic reagent in the presence of an anhydride activator and a solvent, and carrying out nucleophilic substitution reaction to obtain benzothiophene sulfonium salt; the preparation method comprises the following steps: mixing benzothiophene sulfonium salt with an organic solvent, and carrying out metal-catalysis-free intramolecular migration reaction to form a carbon-carbon bond at the C2 site of benzothiophene, thereby obtaining the benzothiophene coupling product. The preparation conditions are mild, the operation is simple and convenient, a traditional oxidation addition-reduction elimination process is replaced by an anchoring-migration strategy, protection of a noble metal catalyst, a complex ligand, strong base or inert gas is not needed, and the problems of high cost, metal residues, harsh reaction conditions and limited substrate applicability in the prior art are fundamentally solved.

Some fluid coupling devices described herein are configured for use in fluid systems for purposes of providing a single-use, aseptic disconnection functionality that substantially prevents fluid spillage when being disconnected. In some embodiments, the coupling portions cannot be functionally reconnected to each other after being disconnected from each other. Some fluid coupling device embodiments described herein include a fluid flow path that is a metallic-free. Moreover, some embodiments of the fluid coupling devices provided herein include no metal whatsoever. That is, the fluid coupling devices are entirely metal-free.

The invention belongs to the field of preparation of conjugated microporous polymers, and particularly discloses a method for synthesizing a conjugated microporous polymer through metal-free catalysis and application of the conjugated microporous polymer. According to the method, triphenylamine (TPA) is taken as a monomer, N-iodosuccinimide (NIS) is introduced to serve as an iodination reagent, the synergistic catalysis of trifluoromethanesulfonic acid (TfOH) is combined, and the synthesis of the conjugated microporous polymer (TPA-CMPs) is successfully realized under the condition that a metal catalyst is not needed. The obtained CMPs material has ultrahigh specific surface area and excellent iodine adsorption capacity, no metal participates in the whole process, the problems of high pollution, high cost and the like in the traditional metal catalytic synthesis process of CMPs are effectively solved, a new thought is provided for green chemical synthesis and functional material development, and the CMPs material has good application prospects in iodine vapor adsorption and iodine adsorption. The catalyst can also be applied to the fields of catalytic carriers, gas separation, environment restoration and the like and has wide application prospects.

The application belongs to the field of organic materials, and particularly relates to a kind of covalent organic framework materials and a synthesis method thereof.The method of the application uses metal-free organic phosphine as catalyst, and monomers containing amino functional groups and monomers containing aldehyde functional groups are obtained through condensation reaction to obtain the covalent organic framework materials.The method of the application can prepare a variety of aggregate states of COFs.

The present invention discloses a method for synthesizing 1,1-diselenoolefin compounds. An alkenylthianthrenium salt compound (1a), a diselenide compound (1b) and a base are mixed, and under nitrogen protection, a solvent is added. After reacting at room temperature for 5 to 6 hours, the product 1,1-diselenoolefin compound (1c) is obtained through post-treatment; this method has simple operation, mild conditions, no metal catalysis, and the final products can all have a medium or higher yield;

The invention discloses a carbon nitride quantum dot as well as a preparation method and application thereof, and the preparation method comprises the following steps: taking formamide as a precursor and a solvent, taking ammonia water as a doping reagent, taking H2O2 as a redox agent, and carrying out solvothermal reaction to obtain the carbon nitride quantum dot. Wherein the temperature of the solvothermal reaction is 160 to 180 DEG C. The preparation method disclosed by the invention is low in raw material cost, short in synthesis time and simple and convenient to operate, efficient batch production is realized, and the generated carbon nitride quantum dot has good stability, shows efficient peroxidase-like activity as a metal-free nano-enzyme, shows excellent catalytic ability in vitro, and has good application prospects. The compound has a great prospect in the aspect of tumor treatment.

The invention provides a CN (at) PDI-CS metal-free photocatalyst with a biomass-based D-A structure as well as a preparation method and application of the CN (at) PDI-CS metal-free photocatalyst, and belongs to the technical field of photocatalytic materials and environmental remediation. The preparation method of the CN (at) PDI-CS metal-free photocatalyst comprises the following steps: (1) mixing PTCDA, CS and imidazole, and carrying out a reaction 1 under a protective atmosphere to obtain PDI-CS; and (2) mixing the PDI-CS, the g-C3N4 and imidazole, and carrying out a reaction 2 to obtain the CN (at) PDI-CS metal-free photocatalyst. According to the catalyst disclosed by the invention, the charge separation efficiency and the visible light absorption capacity are synergistically enhanced through a D-A structure and an electronic push-pull effect, and the recombination rate of photon-generated carriers is reduced, so that the CN (at) PDI-CS material has efficient photocatalytic degradation performance.