Bi_2SiO_5 nanosheets prepared by molten salt method

摘要

Bi_2SiO_5 nanosheets were successfully synthesized by the molten salt method in NaCl-Na_2SO_4 flux using Bi_2O_3 and SiO_2 as raw materials. XRD analysis and SEM observation show that the incorporation of salt medium can greatly lower the formation temperature of Bi_2SiO_5 phase, and promote their crystallization. The results also demonstrate that the mass ratio of salts to reactants, the reaction time, and the calcination temperature have significant effects on the phase formation and morphology of the Bi_2SiO_5 powders. The UV-vis spectra result shows that the absorption of the Bi_2SiO_5 powders located at 380 nm, and the corresponding band gap energy (Eg) calculated is 3.26 eV.