5results about How to "Realize shape control" patented technology

This invention discloses a gallium-silicon molecular sieve, its preparation method, and its application. The chemical composition of the gallium-silicon molecular sieve is SiO2·nGa2O3, where n is the molar ratio of Ga2O3 to SiO2, and the value of n ranges from 0.001 to 0.01. The morphology of the gallium-silicon molecular sieve is a coffin-like lamellar morphology, and its average thickness along the b-axis is 25-100 nm. The preparation method of the gallium-silicon molecular sieve includes the following steps: (1) mixing a silicon source, a template agent, a growth regulator, and water to prepare a seed crystal suspension; (2) mixing the silicon source, gallium source, template agent, water, growth regulator, and the seed crystal suspension to obtain an initial gel, which is then recrystallized to obtain the gallium-silicon molecular sieve. The molecular sieve provided by this invention is used as a catalyst in the alkylation reaction of benzene and methanol, exhibiting high benzene conversion rate and high selectivity for the target product.

The present invention relates to an energy storage power supply with an efficient heat dissipation function, comprising an energy storage battery pack and a heat dissipation shell coated on the surface of the energy storage battery pack; wherein the heat dissipation shell is an internal hollow cavity structure, and the interior of the cavity structure is filled with a phase change material; the phase change material is bismuth molybdate @ palm wax microspheres. The present invention prepares a phase change material for heat dissipation of an energy storage power supply, and the phase change material is a shell-core type bismuth molybdate @ palm wax microsphere. Compared with conventional phase change materials, the phase change material prepared by the present invention not only has higher latent heat storage, but also has the advantages of not easy to leak and high thermal conductivity. Therefore, it is suitable for use in energy storage power supplies to replace traditional phase change materials, thereby achieving the effects of efficient heat dissipation and battery protection.

The invention relates to the field of heterogeneous catalyst preparation, in particular to a Fischer-Tropsch synthesis catalyst, a preparation method thereof and a Fischer-Tropsch synthesis method. The catalyst comprises an alumina carrier with a fiber structure and Co3O4 nanoparticles dispersed in network gaps formed by the fiber structure, and the Co3O4 nanoparticles exist in the form of a Co3O4 nanoparticle aggregate; the mass ratio of the Co3O4 nanoparticles to the alumina carrier is 1: (3.3-5); in a hydrogen temperature programmed reduction H2-TPR test, the temperature corresponding to the highest value of the first reduction peak of the catalyst is 250-400 DEG C, and the integral area of the reduction peak corresponding to the temperature of 100-400 DEG C accounts for 50-70% of the total integral area of all the reduction peaks. The catalyst is used in a Fischer-Tropsch synthesis reaction, and the selectivity of by-product methane is reduced while a relatively high CO conversion rate is maintained.

The present invention relates to the fields of materials, optics and environmental detection, and specifically to a silver-coated optical fiber Raman probe and a preparation method and application thereof, wherein methimazole is used as a Raman signal molecule to realize the detection of Cr(VI). The silver-coated optical fiber Raman probe of the present invention realizes ultra-sensitive detection of Cr(VI) and excellent antioxidant performance by functionalization with methimazole. The preparation method of the present invention has simple process, high sensitivity, good repeatability, good stability and good anti-interference. By adopting stannous chloride-assisted solvent thermal method, the morphology control of silver nanoparticles on the end face of the optical fiber and the strong interface adhesion between the optical fiber and the silver nanomaterial are realized. Specifically, the stannous chloride pretreatment process promotes the dense and uniform growth of silver nanoparticles on the end face of the optical fiber on the one hand, and enhances the interface adhesion between the optical fiber and the silver nanoparticles on the other hand. Ultra-sensitive detection of Cr(VI) and excellent antioxidant performance are realized by functionalization with methimazole.

The invention provides a high-temperature-resistant zirconium-titanium-carbon ceramic precursor and a preparation method thereof, and belongs to the technical field of ceramic materials.The method comprises the steps that a zirconium carbide ceramic precursor is prepared; preparing a sodium cyclopentadiene solution; preparing titanocene dichloride; preparing a titanium intermediate 1 and a titanium intermediate 2; uniformly mixing the titanium intermediate 1, the titanium intermediate 2 and an organic solvent, and reacting at 58-62 DEG C for 1.6-4.3 hours to obtain a titanium carbide ceramic precursor; uniformly mixing the zirconium carbide ceramic precursor, the titanium carbide ceramic precursor and an organic solvent, and reacting to obtain the high-temperature-resistant composite zirconium-titanium-carbon ceramic precursor. According to the invention, the uniformity of the high-temperature-resistant composite zirconium-titanium-carbon ceramic precursor and the stability of high-temperature mechanical properties can be improved.