Abstract: The present invention provides a magnetic Fe2O3 nanosphere with PNH surface modification and application thereof in water treatment. First, 2,2-bipyridyl-5,5?-dicarboxylic acid is reacted with thionyl chloride to obtain 2,2-bipyridyl-5,5?-diacid chloride; then 2,2-bipyridyl-5,5?-diacid chloride and 1,4,8,11-tetraazacyclotetradecane react in the presence of triethylamine to obtain a polynitrogen heterocyclic polymer; the polynitrogen heterocyclic polymer is added into an aqueous solution with iron salt to obtain a magnetic Fe2O3 nanosphere with PNH surface modification which has strong light absorption ability, which improves its ability to catalyze in degradation of tetracycline under visible light, so that the pollutants are removed from water.

Abstract: Visible-light response hybrid aerogel and a preparation method and application thereof in waste gas processing are disclosed. Dicyandiamide is taken as a precursor and is calcined in two times to prepare a carbon nitride nanosheet; the carbon nitride nanosheet is dispersed in water, silver metavanadate quantum dots are subjected to in-situ growth to prepare a silver metavanadate quantum dot/carbon nitride nanosheet composite material; the silver metavanadate quantum dot/carbon nitride nanosheet composite material and graphene oxide carry out hydrothermal reaction, and are then frozen and dried to prepare silver metavanadate quantum dot/carbon nitride nanosheet/graphene hybrid aerogel which is the visible-light response hybrid aerogel. The problems of large reduction dosage, serious secondary pollution, complexity in operation and the like generated when waste gas is processed by a traditional flue gas denitration technology are overcome.

Abstract: The invention discloses a visible light responsive tricobalt tetraoxide dodecahedron/carbon nitride nanosheet composite and an application thereof in exhaust gas treatment. The preparation method of the composite comprises the following steps: with urea as a precursor, carrying out twice calcination to obtain carbon nitride nanosheet; dispersing the carbon nitride nanosheet into methanol, sequentially adding cobalt nitrate hexahydrate and 2-methylimidazole, and carrying out a reaction to obtain a carbon nitride nanosheet composite; and calcining the carbon nitride nanosheet composite in an air atmosphere at a low temperature to obtain the tricobalt tetraoxide dodecahedron/carbon nitride nanosheet composite.

Abstract: The invention discloses a loaded multifunctional catalysis composite material, a preparation method thereof and an application of the composite material to catalytic removal of water pollutants. The preparation method includes the steps: preparing a zinc oxide nano-sheet loaded nickel foam (Ni@ZnO) composite material by an electro-deposition method; compounding molybdenum disulfide micro-nano particles on ZnO porous nano-sheets by an electro-deposition method to obtain Ni@ZnO/MoS2. The composite material Ni@ZnO/MoS2 combines the advantages of components such as nickel foam, the zinc oxide nano-sheets and molybdenum disulfide from the point of material performances, high catalytic degradation activity and recycled performances are achieved, photo-catalysis and electro-catalysis are combined from the point of material application, and the catalytic activity of the composite material is improved by the aid of synergistic effects of photo-catalysis and electro-catalysis.

Abstract: The invention discloses a dinuclear rhodium complex-doped platinum/hollow mesoporous silica sphere composite material, and a preparation method and an application thereof. The preparation method comprises the following steps: preparing hollow mesoporous silica by a selective etching technology, uniformly distributed a precious metal platinum in the channels of the hollow mesoporous silica by using simple impregnation, and mixing the obtained catalyst with dinuclear rhodium complex adsorbed silica gel to obtain the composite material integrating a chromogenic probe with the catalyst.

Abstract: A preparation method of a two-dimensional nitrogen-doped carbon-based titanium dioxide composite material includes: (1) etching Ti3AlC2 with LiF/HCl to prepare two-dimensional transition metal carbide nanosheet; (2) preparing a nanosheet aggregate by electrostatic self-assembly of a two-dimensional transition metal carbide nanosheet and a positively charged nitrogen-containing cationic compound; (3) calcining the nanosheet aggregates to prepare a two-dimensional nitrogen-doped carbon-based titanium dioxide composite material.

Abstract: Disclosed are a honeycomb-like homo-type heterojunction carbon nitride composite material and a preparation method thereof, and an application of the honeycomb-like homo-type heterojunction carbon nitride composite material in catalytic treatment of waste gas. The preparation method includes the following steps: with two different carbon nitride precursors namely urea and thiourea as raw materials, weighing certain amounts of the urea and the thiourea, adding the urea and the thiourea into a crucible, adding a certain amount of ultrapure water, placing the crucible in a muffle furnace, and carrying out calcination molding. The honeycomb-like homo-type heterojunction carbon nitride prepared by the one-step method has good photocatalytic effect to catalytic degradation of NO; meanwhile, the honeycomb-like homo-type heterojunction carbon nitride composite material has the advantages of rich and easily-available production raw materials, good stability, reusability, etc.

Abstract: The present invention provides an In—NH2/g-C3N4 nanocomposites with visible-light photocatalytic activity and application thereof, which can effectively remove organic pollutants (such as tetracycline) in water. First, the graphite phase carbonitride carbon (g-C3N4) was obtained by thermal condensation, and g-C3N4 nanosheet was prepared by thermal oxidative etching. Then, acicular MIL-68(In)—NH2 (In—NH2) was grown in situ on the surface of g-C3N4 nanosheet by solvothermal method. The In—NH2/g-C3N4 nanocomposites with high visible-light photocatalytic activity were obtained. The CNNS firstly was prepared in the present invention, which is beneficial to the needle-like In—NH2 growing on the surface of CNNS and having close interfacial contact with each other, forming a heterojunction, promoting the separation of photogenerated electrons and holes pairs, and enhancing visible-light photocatalytic degradation of organic pollutants.

Abstract: Iodine doped bismuthyl carbonate nanosheet and molybdenum disulfide modified carbon nanofiber composites, preparation method and its application in wastewater treatment are disclosed. Bismuth citrate and sodium carbonate as precursors, sodium carbonate as a precipitating agent, dispersed in a mixed solution of water and ethylene glycol, sodium iodide as a iodine source, nano carbon fiber membrane act as the carrier, to synthesis carbon fiber membrane that modified by iodine-doped Bi2O2CO3 nanosheets; then sodium molybdate and thioacetamide as precursors, dispersed in water to react to obtain iodine doped bismuthyl carbonate nanosheet and molybdenum disulfide modified carbon nanofiber composites. The composite material synthesized through a series of steps exhibit excellent photocatalytic activity for the degradation of Rhodamine B and can be recycled for many times. And this invention has the advantages of simple preparation process, easy recovery and multiple use, etc.

Abstract: A method of preparing a three-dimensional composite material includes the following steps: preparing polystyrene by soap-free emulsion polymerizing, obtaining polystyrene opal by a vertical deposition method, synthesizing MoP IO (molybdenum phosphide inverse opal), and compounding with quantum points CdS, so as to obtain a novel inorganic composite material, namely cadmium sulfide quantum dot-compounded MoP IO. The preparation method has the advantages that the MoP IO is prepared first, and the MoP IO is of a three-dimensional cyclic pore structure and has the photonic band gap feature, so that the MoP IO has better catalysis effect in light catalysis in comparison with that of common porous material; the MoP IO is compounded with the cadmium sulfide quantum dots, so that the light absorbing ability is enhanced, and the composite material capable of absorbing the visible light is obtained.

Abstract: The invention discloses a functionalized hybrid nanotube C@MoS2/SnS2 and preparation method and application thereof. Dissolving ammonium molybdate tetrahydrate in water under ultrasound, adding ethylenediamine with stirring, and then adding dilute hydrochloric acid dropwise to react to obtain MoO3-EDA nanowires; adding L-cysteine and glucose into water containing MoO3-EDA nanowires, and obtaining a dispersion by ultrasonication; heating the dispersion and then centrifuging, then drying the solid matter and then calcining to obtain C@MoS2 nanotubes; adding C@MoS2 nanotubes into water containing SnCl4.5H2O and KSCN, and hydrothermally reacting to obtain functionalized hybrid nanotubes C@MoS2/SnS2. The invention realizes photocatalytic reduction of heavy metal ions to achieve treatment of heavy metal ion solution.

Abstract: The invention discloses a squaraine-polymer-based ammonium/nitrogen monoxide two-component sensor, as well as a preparation method and application thereof. A preparation manner and condition for the sensor are optimized. The squaraine polymer containing azo functional group based ammonium/nitrogen monoxide two-component sensor comprises an interdigital electrode and a coating material with which the interdigital electrode is coated. The coating material is a squaraine polymer containing azo functional group and has high sensing selectivity for ammonium and nitrogen monoxide, the minimum limit of detection thereof is 1 ppb and the response/reversion time is 82s/185s. The sensing performance of the sensor for nitrogen monoxide is also tested, the minimum limit of detection can reach 40 ppb and the response/reversion time is 112s/921s.

Abstract: The present invention provides a magnetic Fe2O3 nanosphere with PNH surface modification and application thereof in water treatment. First, 2,2-bipyridyl-5,5?-dicarboxylic acid is reacted with thionyl chloride to obtain 2,2-bipyridyl-5,5?-diacid chloride; then 2,2-bipyridyl-5,5?-diacid chloride and 1,4,8,11-tetraazacyclotetradecane react in the presence of triethylamine to obtain a polynitrogen heterocyclic polymer; the polynitrogen heterocyclic polymer is added into an aqueous solution with iron salt to obtain a magnetic Fe2O3 nanosphere with PNH surface modification which has strong light absorption ability, which improves its ability to catalyze in degradation of tetracycline under visible light, so that the pollutants are removed from water.

Abstract: The invention provides a titanium carbide nanosheet/layered indium sulfide heterojunction and an application of the same in degrading and removing water pollutants. A simple electrostatic self-assembly method is used to uniformly absorb indium ions on the surfaces of Ti3C2 nanosheets, which effectively inhibits the stacking of the nanosheets and is beneficial to the uniform growth of In2S3 nanosheets on the surfaces of the Ti3C2. The present invent overcomes two disadvantages of too fast photogenerated carrier recombination rate of In2S3 and easy agglomeration of nano-scale In2S3, and effectively improves the separation efficiency and photocatalytic activity of photogenerated electron-hole of In2S3.

Abstract: The present invention provides an In—NH2/g-C3N4 nanocomposites with visible-light photocatalytic activity and application thereof, which can effectively remove organic pollutants (such as tetracycline) in water. First, the graphite phase carbonitride carbon (g-C3N4) was obtained by thermal condensation, and g-C3N4 nanosheet was prepared by thermal oxidative etching. Then, acicular MIL-68(In)—NH2 (In—NH2) was grown in situ on the surface of g-C3N4 nanosheet by solvothermal method. The In—NH2/g-C3N4 nanocomposites with high visible-light photocatalytic activity were obtained. The CNNS firstly was prepared in the present invention, which is beneficial to the needle-like In—NH2 growing on the surface of CNNS and having close interfacial contact with each other, forming a heterojunction, promoting the separation of photogenerated electrons and holes pairs, and enhancing visible-light photocatalytic degradation of organic pollutants.

Abstract: A heterojunction composite material consisting of one-dimensional In2O3 hollow nanotube and two-dimensional ZnFe2O4 nanosheets and its application are disclosed. When using this material for catalytic reactions, the hollow cavity and two-dimensional nanosheets of hollow nanomaterials can not only reduce the migration distance to accelerate the electron-hole separation, but also provide a large surface area and rich active sites to promote pollution adsorption and surface catalysis. At the same time, multiple light scattering or reflection in the hollow cavity of the hollow nanomaterials can increase light absorption and utilization. In addition, the heterojunction photocatalyst constructed by growing two-dimensional semiconductor nanosheets on a tubular substrate can promote the effective separation of photogenerated electrons and photogenerated holes, thereby improving the catalytic efficiency.

Abstract: The invention discloses a visible light responsive tricobalt tetraoxide dodecahedron/carbon nitride nanosheet composite and an application thereof in exhaust gas treatment. The preparation method of the composite comprises the following steps: with urea as a precursor, carrying out twice calcination to obtain carbon nitride nanosheet; dispersing the carbon nitride nanosheet into methanol, sequentially adding cobalt nitrate hexahydrate and 2-methylimidazole, and carrying out a reaction to obtain a carbon nitride nanosheet composite; and calcining the carbon nitride nanosheet composite in an air atmosphere at a low temperature to obtain the tricobalt tetraoxide dodecahedron/carbon nitride nanosheet composite.

Abstract: The invention aims to provide a copper mesh coated with manganese molybdate and application thereof in the separation of oil-water emulsion and degradation of organic pollutants in water. A large amount of nano-scale manganese molybdates are grown on the surface of a copper mesh through a two-step hydrothermal method. Thereby, a multifunctional composite material is prepared, which can effectively separate oil-water emulsion and degrade organic pollutants in water. The copper mesh has good recyclability. Most of all, the product is suitable for industrial production to achieve the purpose of treating water pollution.

Abstract: The present invention disclosed preparation method of a visible-light-driven CC@SnS2/SnO2 composite catalyst, and application thereof, comprising the following steps: preparing CC@SnS2 composite material in a solvent by using SnCl4.5H2O and C2H5NS as raw materials and carbon fiber cloth as a supporting material; calcining said CC@SnS2 composite material to obtain the visible-light-driven CC@SnS2/SnO2 composite catalyst. The present invention overcomes defects of the traditional methods of treating chromium-containing wastewater, including chemical precipitation, adsorption, ion exchange resin and electrolysis, and the photocatalytic technology can make full use of solar light source or artificial light source without adding adsorbent or reducing agent. In this case, the use of semiconductor photocatalyst to convert hexavalent chromium in chromium wastewater into less toxic and easily precipitated trivalent chromium greatly reduces the cost and energy consumption.

Abstract: The invention discloses a magnetic nanoparticle microbial composite material with a core-shell structure and a preparation method thereof as well as application of the magnetic nanoparticle microbial composite material in azo dye treatment. The preparation method comprises the following steps: putting ferroferric oxide into an ethanol solution with ferric trichloride and trimesic acid; carrying out layer-by-layer self-assembly and ultrasonic condition reaction in sequence to prepare modified ferroferric oxide nanoparticles; then loading the modified composite material on the surfaces of microorganisms. The composite material prepared by the preparation method disclosed by the invention has the advantages of high adsorption effects and capability of carrying out local enrichment on the dye; meanwhile, magnetic separation can be performed, and thereby the azo dye can be removed efficiently.