疏水性硫化铋纳米材料的改性及其性能研究

Modification of hydrophobic Bismuth Sulfide Nanomaterials and Study on Their Photothermal Conversion Properties

开发一种新的疏水性硫化铋纳米材料的改性方法,考察改性后的硫化铋纳米材料的光热转换能力。首先制备出油酸、油胺保护的硫化铋纳米材料;接下来合成一种一端可以与钆螯合,另一端为长链烷基链的两亲性的配体;最后,该配体与油相的硫化铋通过非共价作用力结合在一起,得到了钆修饰的硫化铋纳米材料。实验结果显示,该方法可以有效将疏水性硫化铋纳米材料改性为尺寸均一、在水中分散性良好硫化铋纳米材料,改性后的硫化铋纳米材料具有较强的近红外吸收能力,在808nm近红外激光器照射下,在250s即可升温26.3℃。

In this thesis,a new method for the modification of hydrophobic bismuth sulfide nanomaterials was developed to investigate the photothermal conversion ability of the modified bismuth sulfide nanomaterials.In this paper,firstly,oleic acid and oleylamine-protected bismuth sulfide nanomaterials were prepared.Then,an amphiphilic ligand chelating with gadolinium at one end and a long-chain alkyl chain at the other end was synthesized.Finally,Bismuth sulphide in the oil phase was combined by non-covalent forces to obtain a gadolinium-modified bismuth sulfide nanomaterial.The experimental results show that the method can effectively modify the hydrophobic bismuth sulfide nanomaterials into homogeneous size and good dispersion of bismuth sulfide nanomaterials in water,and the modified bismuth sulfide nanomaterials have strong near-infrared absorption ability and can be heated up to 26.3℃in 250 sunder the irradiation of808 nm near-infrared laser.