In this paper,solid indium is dissolved in a volumetric flask by hydrochloric acid,then dissolved in a volumetric flask by taking solid sodium sulfide and then dissolved in a volumetric flask to obtain indium chloride solution and sodium sulfide solution,then indium sulfide was characterized by XRD,fluorescence spectra,UV-Vis absorption spectra,the size of its nanoparticles and fluorescence intensity can be analyzed.The XRD patterns show that the product is tetragonal indium sulfide nanoparticles with average grain size of about 7.2 nm.The average grain size is about 7.4 nm by UV-Vis analysis,therefore,the product is tetragonal indium sulfide nanoparticles with average grain size between 7.2 nm and 7.4 nm.
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