Zn_2SiO_4纳米材料的可控制备及光吸收性能研究

Controlled Synthesis and Optical Absorption Properties of Zn_2SiO_4 Nanomaterials

以Zn(NO3)2·6H2O和纳米SiO2为原料,采用水热法,通过控制反应体系pH值制备了Zn2SiO4纳米颗粒、纳米棒及海胆形微米球。采用X射线衍射(XRD)及场发射扫描电子显微镜(FE-SEM)对样品的物相组成和微观形貌进行了表征。并采用紫外-可见漫反射测试(UV-vis DRS)测定了样品的光吸收性能,DRS结果显示Zn2SiO4纳米材料的光吸收主要集中在紫外光区,与Zn2SiO4纳米棒和纳米颗粒相比,海胆形Zn2SiO4微米球的吸收峰更宽,表明其对光的利用范围要大于纳米棒和纳米颗粒。

Using Zn（ NO3）2·6H2O and nano-SiO2 as raw materials,Zn2SiO4 nanoparticles,nanorods and urchin-like microspheres were controlled fabricated by a direct and simple hydrothermal process. The structure and morphologies of the as-prepared Zn2SiO4 nanomaterials were characterized by X-ray diffraction（ XRD）,field-emission scanning electron microscopy（ FE-SEM） and UV-visible diffuse reflectance spectrum. The results show that the as-prepared Zn2SiO4 nanoparticles,nanorods and urchinlike microspheres present strong absorption in the UV region.