In air template-free synthesis of In_2S_3 hierarchical nanostructure from InCl_3·4H_2O and thiourea

摘要

A novel template-free method, which was based on heating the mixture of InCl_3·4H_2O and thiourea in air from room temperature to 200 or 250°C, coupled with a subsequent washing treatment using distilled water and ethanol, was proposed for the synthesis of In_2S_3 hierarchical nanostructure. X-ray diffraction and field emission scanning electronic microscopy demonstrated that the obtained products were pure cubic phase In_2S_3 urchin-like clusters built up by mainly nanoflakes (about 12-47 nm thick). UV-vis absorption spectra disclosed that the as-prepared In_2S_3 urchins had optical band gaps in the range of about 2.18-2.26 eV.