A kind of preparation method of orange-red light emitting tunable BCNO phosphor

Abstract

The invention relates to a preparation method of orange-red light emission adjustable BCNO (boron-carbon-nitrogen-oxygen) fluorescent powder. The method comprises the following steps: step 1, boric acid and alpha-alanine are added into an oven and are subjected to a heating pretreatment under a heating temperature of 110-130 DEG C for 4-6h; after heating, the materials are naturally cooled to room temperature; step 2, the boric acid and alpha-alanine after the heating pretreatment are placed into a reactor; deionized water is added, and the mixture is stirred for 4-6h under a temperature of 40-60 DEG C; the temperature of the solution is increased to 110-130 DEG C until water is completely evaporated, such that a BCNO precursor is obtained; and step 3, the prepared BCNO precursor is heated to a temperature of 600-700 DEG C and is sintered for 8-24h; the obtained material is naturally cooled to room temperature, such that the orange-red light emission adjustable BCNO fluorescent powder is obtained. According to the method, only two raw materials are needed. The BCNO precursor is synthesized with a liquid phase method, and the orange-red light emission BCNO fluorescent powder is prepared through low-temperature sintering.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and more specifically relates to a method for preparing BCNO (boron carbon nitrogen oxygen) fluorescent powder with adjustable orange-red light emission through low-temperature sintering. Background technique [0002] Most of the current phosphor materials are based on rare earth elements (Eu 2+ 、Ce 3+ etc.) as an activator to emit light, not only expensive, the synthesis temperature is high (above 900 ° C), and a protective atmosphere (nitrogen or argon) or a reducing atmosphere (hydrogen) is required for sintering, and the toxicity of rare earth chlorides is high, serious polluted environment. Red light-emitting phosphors are widely used in white LED, display, biomedicine and other fields. At present, most red-emitting phosphors are Eu-doped sulfides (Ca / SrS:Eu 2+ ), is not only expensive, but also has certain toxicity, and the sulfide is easy to absorb moisture and has unstable...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of BCNO phosphor with adjustable orange-red emission, which is relatively lacking in the current phosphor material system, and is basically doped with rare earths to emit red light. The method only uses boric acid and alanine (α-alanine), using the chemical structure of alanine, the composition of special chemical bonds, and the appropriate ratio of carbon and nitrogen, the precursor of BCNO was first synthesized by the liquid phase method, and then in the unprotected The low-temperature sintering precursor in the muffle furnace of the atmosphere is used to prepare the BCNO phosphor emitting orange-red light, which overcomes the use of three raw materials in the current technology to synthesize the BCNO phosphor (if only two raw materials are used instead of carbon sources to adjust the emission spectrum, Its emission spectrum is basically in the blue light band

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