Luminescent material of gallium indium oxide and preparation method thereof

A method for preparing a gallium indium oxide luminescent material, comprising the steps of:

• Step S1, adding a source compound of In and a source compound of Ga according to stoichiometric ratio of corresponding elements in chemical formula GaInO3 into a mixed solvent of water and ethanol to prepare a mixed solution containing In ions and Ga ions;
• Step S2, adding a chelating agent and optionally a crosslinking agent into the mixed solution obtained in Step 51 to prepare a chelating solution;
• Step S3, adding a surface-treated M nanoparticle sol into the chelating solution prepared in Step S2, and heating in a water bath while stirring, and then drying to give a precursor having a chemical formula of GaInO3 with zM;
• wherein M represents a metal nanoparticle which is one or two selected from the group consisting of Ag, Au, Pt and Pd, and z is in the range of 1×10−5≦z≦0.02;
• and
• Step S4, pre-calcinating the precursor obtained in Step S3, cooling, grinding, and then calcinating, cooling and grinding again to obtain the gallium indium oxide luminescent material having a chemical formula of GaInO3 with zM.