58results about How to "Efficient photocatalytic performance" patented technology

The invention provides a synthesis method of a high-activity TiO2 nanodisk photocatalyst. The method is simple and easy to implement, and has the advantages of favorable repeatability and high stability; and the prepared {001}-surface-exposed TiO2 nanodisk photocatalyst has the advantages of novel structure and high photocatalytic activity. The method comprises the following steps: 1) mixing water with glacial acetic acid and hydrofluoric acid; 2) after adding tetrabutyl titanate, mechanically stirring for 10 minutes; 3) putting the solution into a reaction kettle, and carrying out hydrothermal treatment at 180 DEG C for 24 hours; and 4) separating, precipitating, carrying out centrifuge washing on the precipitate with water 3 times, drying at 60 DEG C, calcining at 600 DEG C for 2 hours, and naturally cooling to room temperature, wherein the tetrabutyl titanate:water:glacial acetic acid:HF mol ratio is 1:(50-100):100:2.

The invention aims at providing a method for synthesizing a scale-shaped graphite-phase nitrogen carbide nanosheet / cobaltosic oxide nanosheet composite material and belongs to the technical field of material preparation and catalysis. The composite material is prepared from the raw materials of functionalized graphite-phase nitrogen carbide and cobalt salt through a hydrothermal method at high temperature. The prepared scale-shaped two-dimensional nitrogen carbide nanosheet / cobaltosic oxide nanosheet composite material is in morphology that a scale-shaped cobaltosic oxide nanosheet nanocomposite material evenly grows on the surface of a two-dimensional nitrogen carbide nanosheet. Compared with a traditional pure two-dimensional nitrogen carbide nanomaterial, the specific surface area of the material and the screening capacity of the material to a catalytic substrate are effectively improved, and the material has more efficient photocatalytic performance. The preparation method has the advantages of simple technology, low cost and high catalytic efficiency; the prepared material has efficient carbon dioxide reducing capacity, and thus has good application prospect in the photocatalysis field of environmental modification, greenhouse gas elimination and the like.

The invention discloses a hexagonal boron nitride modified graphitized carbon nitride composite optical catalyst as well as a preparation method and application thereof. According to the composite optical catalyst, by taking graphitized carbon nitride as a carrier, laminated hexagonal boron nitride modifies the graphitized carbon nitride carrier. The preparation method comprises the following steps: mixing the hexagonal boron nitride with a graphitized carbon nitride precursor; and calcining the mixed precursor to obtain the hexagonal boron nitride modified graphitized carbon nitride composite optical catalyst. The hexagonal boron nitride modified graphitized carbon nitride composite optical catalyst disclosed by the invention has the advantages of being environmentally friendly, fully free of metal doping, large in specific surface area, high in photoproduction electron-hole separating efficiency, high in optical catalytic activity, good in stability, corrosion-resistant and the like. The preparation method has the advantages of being simple, low in cost of raw materials, less in energy consumption, easy to control conditions and the like. The composite optical catalyst disclosed by the invention is used for degrading dye wastewater and has the advantages of being simple in application method, stable in optical catalytic performance, high in corrosion resistance, high in dye wastewater degrading efficiency.

The invention discloses a phosphorus doped carbon nitride / carbon nitride homogeneous heterojunction photocatalyst as well as a preparation method and application thereof. The photocatalyst is preparedby taking carbon nitride as a carrier, and the carbon nitride is modified by phosphorus-doped carbon nitride. The preparation method comprises the steps of mixing the phosphorus-doped carbon nitridewith melamine, and calcining the obtained mixture precursor to obtain the phosphorus doped carbon nitride / carbon nitride homogeneous heterojunction photocatalyst. The photocatalyst provided by the invention has the advantages of green and environmental friendlyness, completely free from metal doping, strong in absorption of visible light, large in specific surface area, fast in photo-generated charge separation rate, high in photocatalytic activity, stable in chemical properties, corrosion-resistant, and the like; the preparation method of the photocatalyst has the advantages of simple preparation process, easy control, easy obtaining of raw materials, low cost, is suitable for continuous large-scale mass production, and the like. The photocatalyst provided by the invention can be used fordegrading antibiotic wastewater, and has the advantages of stable photocatalytic performance, high corrosion resistance and high degradation efficiency, thus having a very good practical applicationprospect.