SiO_2/PE/Bi_2S_3核壳结构纳米颗粒的合成与性能(英文)

以多层电解质作为微型反应器,制备了SiO2/Polyelectrolyte(PE)/Bi2S3核壳纳米粒子。XRD结果表明Bi2S3颗粒属于正交晶系。由透射电镜和场发射扫描电镜照片可知,在直径为640nm左右的SiO2表面覆盖了厚度35nm的Bi2S3壳层。红外光谱分析结果表明硅烷网络在结构上发生了变化(SiO2表面的硅烷醇键沉积在Bi2S3的表面)。SiO2核和SiO2/PE/Bi2S3的紫外-可见吸收光谱显示在900nm存在典型吸收边。

SiO_2/Polyelectrolyte(PE)/Bi_2S_3 Core-shell Nanoparticles:Synthesis and Properties

SiO2/ Polyelectrolyte(PE) / Bi2S3 composite nanoparticles were prepared by a polyelectrolyte(PE) muti- layer as microreactor. Bi2S3 particles were shown by XRD to be with an orthorhombic uniform structure. The sur- faces of SiO2 (about 640 nm) particles were covered by thin layers (35 nm) of Bi2S3 consisted of 32 nm particles as evidenced by TEM and field emission scanning electron microscopic studies. The structural changes occurred in the siloxane network and surface silanol groups of SiO2 upon the 1deposition of Bi2S3. The UV-Visible spectra of SiO2 core and SiO2/PE/Bi2S3 show typical absorption band onset (900 nm).