期刊论文

Preparation of multicavity yolk-shell structured silicon microspheres with magnetic Fe_3 O_4

中文

应用化工

1671-3206

2021

50

11

3049-3054+3060

中央级公益性科研院所基本科研业务专项（PM-zx703-202002-079）；

本校为第一机构

以三甲基氧基苯基硅烷(PTMS)作为硅源,以Fe_3 O_4为内核,一步制备了形貌良好且内部具有多个微型空腔与磁核的卵黄结构磁性介孔硅球,研究了HNO_3投加量、PTMS投加量、温度、水解时间、搅拌转速、Fe_3 O_4投加量对卵黄磁性硅球的形貌及性能的影响。结果表明,在投入37 μL HNO_3 、0.95 mL PTMS、150 mg Fe_3 O_4,于60 ℃水浴中反应,以260 r/ min机械搅拌3 min所得样品S3的尺寸、形貌最佳,其粒径为296 nm、磁饱和强度为10.8 emu/ g、比表面积218 m~2 / g、孔容为0.132 cm~3 / g。

The one-step method uses trimethoxyphenylsilane as the silicon source and Fe_3O_4 as the core to prepare a magnetic silicon sphere with good morphology and numerous cavities inside. The effects of HNO_3 dosage,PTMS dosage,temperature,hydrolysis time,stirring speed and Fe_3O_4 dosage on the morphology and properties of magnetic silica spheres were investigated. The results show that the best size and shape of the standard sample S3 was obtained by reacting 37 μL HNO_3,0.95 mL PTMS,150 mg Fe_3O_4 in water bath at 60 ℃ and mechanical stirring at...