Effect of alkaline concentration on the structural and luminescence properties of ZnSnO_3 nanoparticles obtained by facile reflux method

摘要

We report the green synthesis of cubic ZnSnO_3 crystallites by facile reflux method at relatively low temperature (100 ℃) without the use of any surfactants or templates. Structural and morphological analysis by XRD, Raman and FESEM confirmed the formation of ZnSnO_3 microcubes with perovskite structure. Optical analysis by UV-vis absorption showed a band gap of 3.52 eV, while the PL measurements exhibited emission peaks both in the UV as weU as visible region. Experimental results demonstrated that the alkaline concentration have significant influence on the formation of ZnSnO_3 nanoparticles. Single phase cubic ZnSnO_3 particles were obtained when the molar ratio of Zn~(2+):Sn~(4+):OH~- was maintained at 1:1:8, whereas mixed phases of ZnSn(OH)_6/ZnSnO_3 and ZnSnO_3/ZnO were obtained when the molar ratio of Zn~(2+):Sn~(4+):OH~- was maintained at 1:1:＜8 and 1: 1:＞8, respectively.