2results about How to "Lower catalytic temperature" patented technology

The application relates to the technical field of 3D printing and catalytic material preparation, and discloses a VOCs oxidation catalyst, a preparation method thereof and application of the VOCs oxidation catalyst in catalytic oxidation of VOCs. The preparation method of the catalyst comprises the following steps: obtaining an embryo with a hollow lattice structure through 3D printing; performing defatting, sintering and alkali treatment on the embryo to obtain a 3D printed ceramic carrier; loading catalyst slurry on the surface of the 3D printed ceramic carrier, and then performing drying and calcination treatment to obtain the VOCs oxidation catalyst. The VOCs oxidation catalyst is prepared through the above method, is rich in interconnected pores, has a large specific surface area and a high catalyst loading capacity, has a low catalytic temperature, and can realize catalytic oxidation of VOCs at a high air speed and a low temperature.

This application belongs to the field of battery technology, and particularly relates to silicon-carbon composite materials and their preparation methods, electrodes, and batteries. The method includes: mixing asphalt with potassium hydroxide and dopants uniformly, heating to a first preset temperature, passing a crosslinking agent mixed gas at a first preset flow rate for first activation, cooling to obtain asphalt-based porous carbon; adding the asphalt-based porous carbon to an aldehyde compound solution, then adding a phenolic compound and a catalyst and mixing uniformly, performing a hydrothermal reaction, filtering, and performing a second activation to obtain a hard carbon-coated soft carbon porous carbon composite material; immersing the porous carbon composite material in a liquid silane solution and reacting under closed negative pressure to obtain an intermediate material; heating the asphalt to a molten state, then adding the intermediate material and an organoniobium compound and stirring uniformly to perform carbonization to obtain a silicon-carbon composite material; possessing low expansion, high pore volume, low impedance, and high compaction density, thus improving the electrochemical performance of the battery.