Preparation method of zinc oxide-barium sulfate composite nano material, zinc oxide-barium sulfate composite nano material, application and LED chip

The invention discloses a preparation method of a zinc oxide-barium sulfate composite nano material, the zinc oxide-barium sulfate composite nano material, an application and an LED chip, and relatesto the technical field of zinc oxide fluorescent powder. The method comprises the following steps: (a) preparing nano zinc oxide by adopting a sol-gel method, and carrying out surface modification onthe nano zinc oxide to obtain zinc oxide powder; and (b) dissolving zinc oxide powder in water to obtain a zinc oxide solution, adding a sulfate solution into the zinc oxide solution, carrying out uniform mixing, and then adding a barium salt solution for forming a precipitate, so as to obtain the zinc oxide-barium sulfate composite nano material. According to the invention, problems that nano zinc oxide has poor stability, serious light attenuation and poor thermal stability, is not resistant to acid, alkali or various organic solvents, and is rarely used in LED fluorescent powder can be solved. The pomegranate-shaped