37results about How to "Extensive commercial application" patented technology

The invention discloses a CuGaS-ZnS core-shell structure quantum-dot material and a preparation method thereof. The material is prepared from a copper-gallium-sulfur quantum-dot core and a zinc sulfide shell, wherein the zinc sulfide shell externally wraps the copper-gallium-sulfur quantum-dot core; a chemical molecular formula of the core is CuxGa1.33-0.33xS2; the diameter of the core is 2nm to 10nm; the shell thickness of the zinc sulfide shell is 0.3nm to 3nm. The method comprises the following steps of firstly mixing a copper source, a gallium source and a sulfur source, then putting in an inert atmosphere, heating, carrying out heat preservation, raising a temperature, reacting to obtain a CuGaS quantum-dot reaction solution, afterwards, injecting a zinc precursor solution into the CuGaS quantum-dot reaction solution, carrying out the heat preservation, then adding n-hexane and ethanol into an obtained mixture, agitating to obtain a turbid solution, and carrying out solid-liquid separation treatment on the turbid solution, so that a target product is prepared. A stimulated emission spectrum of the CuGaS-ZnS quantum-dot material reaches the wide wavelength range of 520nm to 620nm; further, the position of a light emission peak of an output spectrum is adjustable; the quantum efficiency of a quantum dot of yellow-green light at a position, which is 550nm of the light emission peak, is up to 75 percent; the CuGaS-ZnS quantum-dot material is enabled to be extremely easily, widely and commercially applied to the fields of photoluminescent devices and electroluminescent devices.

The invention discloses a preparation method of porous graphene. The preparation method comprises the following steps: dissolving ammonium salt and glucose into deionized water according to a weight ratio of the ammonium salt to the glucose to the deionized water being (0.6 to 1.2) to (0.4 to 0.8) to 5, thus obtaining mixed liquor, then adding a 1.8 to 2.2g / L graphene oxide water solution into the mixed liquor according to a weight ratio of the graphene oxide water solution to the ammonium salt in the mixed liquor being 10 to (0.6 to 1.2), stirring, drying to form a paste shape at 30 to 50 DEG C, thus obtaining a pasty mixture, then putting the pasty mixture into a protective atmosphere, heating the pasty mixture to 900 to 1000 DEG C from room temperature through 2 to 4h, and preserving heat for 1 to 2h, thus preparing a target product, wherein the ammonium salt is ammonium chloride or ammonium carbonate or ammonium nitrate, and the protective atmosphere is an argon atmosphere or helium atmosphere or neon atmosphere. The target product prepared by the preparation method can be directly used, is higher in electrical conductivity, and is very easily and widely commercialized and applied to fields such as environmental governance and energy utilization.

The invention discloses a gold-tin oxide core-shell structure composite nano material and a preparation method thereof. The material is composed of tin oxide-coated gold nanoparticles, wherein the particle size of the material is 12-26nm, the particle size of the gold nanoparticles is 10-20nm, the thickness of the tin oxide layer is 1-3nm, and the particle size is 1-20nm. 3nm tin oxide particles; the method first place the gold target in the tin chloride aqueous solution under stirring, and then use the wavelength of 532nm or 1064nm, the repetition frequency of 1-20Hz, the pulse width of 5-15ns, and the power A 120mJ / pulse laser irradiates the gold target for at least 1 min to obtain a mixed colloidal solution. After that, the mixed colloidal solution is sequentially subjected to solid-liquid separation, washing and drying to obtain the target product. It has higher gas sensitivity performance and is very easy to be widely commercialized and applied in the detection field of toxic, harmful, flammable and explosive gases.