SDS-PEG软模板法制备纳米硒球

Synthesis of Selenium Nanospheres Using SDS-PEG Cluster as Soft Template

以十二烷基硫酸钠(SDS)-聚乙二醇(PEG)组成的项链状软物质团簇为可调控性模板,在水溶液中采用水合肼(N2H4.H2O)还原亚硒酸(H2SeO3)制备纳米硒球。XRD结果表明,所得红色还原产物为无定形的纳米硒球;DSC测得产物纳米硒球的熔融温度为221℃。在一定范围内改变SDS浓度,可以影响制备得到纳米硒球的粒径,TEM结果显示,增加SDS浓度可以使体系中产物的平均粒径由35 nm增大到85 nm;UV-Vis光谱显示,吸收强度随着还原产物平均粒径增大而下降,同时伴随着一定程度的红移。

Selenium nanospheres were prepared from selenious acid reduced by hydrazine hydrate in the soft template composed of sodium dodecyl sulfate（SDS）-polyethylene glycol（PEG） cluster in aqueous solution.The XRD pattern suggests that the red product is amorphous Se.The DSC thermogram of the as-synthesized selenium nanospheres shows a melting peak at 221 ℃.The concentration of SDS has an influence on the size of selenium nanospheres.The TEM images show that the average diameter of the reduced products increases from 35 nm to 85 nm with increase in the concentration of SDS.The UV-Vis spectrums show that the absorption becomes both stronger and red-shifted when average diameter of selenium nanospheres is increased.