palladium in the structure of the nanocatalyst was illustrated by XRD and EDS analysis. Also using XPS technique, the oxidation state of palladium in Pd@ABA@SPIONs@SiO2 was determined zero before and after the catalyst was applied in Mizoroki-Heck reaction. Several aryl halides and alkenes were reacted in the presence of the nanocatalyst and formed the corresponding products in high isolated yields. The
通过将
钯固定在2-
氨基苯甲酰胺官能化的
二氧化硅包覆的超顺磁性
氧化铁磁性纳米粒子上,构建了适用的
钯基纳米催化剂。纳米催化剂(命名为Pd @ ABA @
SPIONs @ SiO 2)通过几种表征方法进行表征,包括扫描电子显微镜(
SEM),透射电子显微镜(
TEM),振动样品磁力法(VSM),能量色散X射线光谱法(EDS),动态光散射(DLS),X射线粉末衍射(XRD),傅里叶变换红外光谱(FT-IR),电感耦合等离子体(ICP)和X射线光电子能谱(XPS)分析。显微镜结果表明,纳米颗粒为球形,大小为20–25 nm。纳米颗粒的尺寸通过DLS方法确认。通过VSM方法证实了催化剂的超顺磁性。
SPIONs @ SiO 2的成功功能化由FT-IR光谱证实。通过XRD和EDS分析说明了纳米催化剂结构中
钯的存在。同样使用XPS技术,在将催化剂用于Mizoroki-Heck反应前后,
钯在Pd @ ABA @