A general and rapid synthesis of metal sulphides hollow spheres that have properties enhanced by salt-assisted aerosol decomposition: a case of ZnS and other multicomponent solid solutions
作者:Wei Zou、Jun Chen、Lei Hu、Qiang Li、Xiang Yao、Lin Gu、Jinxia Deng、Ranbo Yu、Xianran Xing
DOI:10.1039/c4tc01557f
日期:——
Synthesis of hollow structures of metal sulphides generally involves various templates and complex chemical processing. In the present study, a general and rapid method of salt-assisted aerosol decomposition (SAD) is presented for the synthesis of hollow spheres of various metal sulfides, including ZnS, ternary sulfides, and solid solutions. The NaCl salt plays a critical role in the formation of hollow spheres of metal sulfides. The hollow spherical microstructure was formed from solid by using a small amount of water soluble NaCl salt. The formation of metal sulphide hollow spheres differs from previous mechanisms and is referred to as molten salt heterogeneous nucleation (MSHN). The present method offers the most promising advantage for controlling the multicomponent composition of hollow spheres. Furthermore, hollow spheres of sulphides have much enhanced properties such as photoluminescence of ZnS:Mn2+ and photocatalytic dye degradation of ZnIn2S4 due to the role of molten salt in the promotion of crystallization, The present method could be explored further by applying the process to other compounds such as sulfides, oxides, and nitrides.
金属硫化物空心结构的合成通常涉及各种模板和复杂的化学处理。本研究提出了一种盐辅助气溶胶分解(SAD)的通用快速方法,用于合成各种金属硫化物(包括 ZnS、三元硫化物和固溶体)的空心球。氯化钠在金属硫化物空心球的形成过程中起着关键作用。通过使用少量水溶性氯化钠盐,从固体中形成了空心球形微结构。金属硫化物空心球的形成不同于以往的机制,被称为熔盐异质成核(MSHN)。本方法在控制空心球的多组分成分方面具有最有前途的优势。此外,由于熔盐对结晶的促进作用,硫化物空心球的性能大大增强,如 ZnS:Mn2+ 的光致发光和 ZnIn2S4 的光催化染料降解。