2 results about "Economic feasibility" patented technology

The invention discloses a bending and shearing separation type prefabricated assembly-type frame column and a construction method thereof. A column section comprises an upper column section body and alower column section body; the spliced position of the column section bodies is located at a bending moment anti-bending point; a horizontal bottom-end steel seal plate is pre-embedded in the bottomend face of the column section, and a downwards externally-protruding shear key is arranged on the lower surface of the bottom-end steel seal plate; a horizontal top-end steel seal plate is pre-embedded in the top end face of the column section, and a downwards internally-sunken shear key groove which is matched with the shear key is formed in the upper surface of the top-end steel seal plate; thebottom-end steel seal plate and the top-end steel seal plate are tightly attached; the shear key is downwards clamped into the shear key groove, and the shear key and the shear key groove are tightlymatched; and the top-end steel seal plate and the bottom-end steel seal plate are fixedly connected into a whole through an anti-bending piece. According to the bending and shearing separation type prefabricated assembly-type frame column, bending and shearing members are separated, the vertical bearing capacity of the frame column can be guaranteed, the anti-seismic requirement is met, the structure is simple, processing, construction and mounting are convenient, and meanwhile the economically feasible performance cost ratio is high.

The invention relates to porous MoO2 photocatalyst microspheres with a hierarchical structure and a preparation method thereof, and belongs to the photocatalyst microspheres and the preparation methodthereof. The porous MoO2 photocatalyst microspheres are composed of a porous outer shell and an inner reticulated porous skeleton. The method comprises the steps: with citric acid as a fuel, ammoniumparamolybdate as a raw material and water as a solvent, carrying out magnetic stirring to form a mixed solution, then, spraying the solution into a tubular furnace with the temperature of 400-500 DEGC by ultrasonic atomization, and obtaining the porous MoO2 photocatalyst microspheres with the hierarchical structure. The preparation system has the advantages of simple operation of technological method, low cost of raw materials, economic feasibility and the like. The catalyst prepared by the method has a special hierarchical structure, and has the hollow and porous morphological characteristics, small particle size, uniform distribution and no agglomeration. The diameter of the microspheres is between 0.5 and 2 [mu]m. The catalyst has good photocatalytic performance and good hydrophilicity, and is beneficial to the application in the fields of photocatalysis, water pollution treatment, lithium ion batteries, supercapacitors, gas sensors and the like.