银及其化合物纳米材料的制备及光热性能研究

发布时间：2018-04-13 13:03

  本文选题：Ag/Ag_2S + 核壳结构　； 参考：《青岛科技大学》2017年硕士论文

【摘要】：银基复合材料由于其在近红外光区优异的光吸收和光热转换性能在光热肿瘤治疗方面受到广泛关注。本论文分别制备了Ag@Ag_2S核壳结构、Ag_2S/Ag异质结构和“蓝银”络合物。用XRD和TEM等测试方法对样品进行了表征,测试了其光吸收和光热性能,并计算了其光热转换效率。结果如下:1.以纳米Ag立方体和类球形颗粒作为模板分别制备得到八足虫Ag@Ag_2S和类球形Ag@Ag_2S。与纳米Ag颗粒相比,八足虫Ag@Ag_2S和类球形Ag@Ag_2S的光吸收峰明显宽化,同时其在可见到近红外光区的吸收强度明显增强。质量分数为0.01%的八足虫Ag@Ag_2S和类球形Ag@Ag_2S样品在808 nm激光照射下的最大温升分别为35 oC和38 oC,其光热转换效率分别为58.56%和63.07%。结果表明两种形貌的Ag@Ag_2S与单一组分Ag和Ag_2S相比均具有增强的光热转换性能。2.通过原位还原Ag_2S纳米颗粒制备得到Ag_2S/Ag异质结构。与Ag_2S纳米颗粒相比,Ag_2S/Ag异质结构在400 nm处出现吸收峰,同时在近红外光区的吸收强度增强。质量分数为0.01%的Ag_2S/Ag在808 nm激光照射下的最大温升和光热转换效率分别为17.2 oC和51.27%,相对于单一组分Ag_2S具有增强的光热转换性能。3.将AgNO_3水溶液和聚丙烯酸钠(P30)水溶液混合制备得到“蓝银”络合物,对其进行了光吸收和光热性能测试,并计算了光热转换效率。结果表明:“蓝银”络合物在600-900 nm有一个较强的光吸收峰;在808 nm激光照射下“蓝银”络合物随着质量分数由0.005%增加到0.05%时,其最大温升由14.6 oC增加到48.9 oC,其光热转换效率在质量分数为0.03%达到最大,为68.79%。
[Abstract]:Silver matrix composites have attracted much attention in photothermal tumor therapy for their excellent optical absorption and photothermal conversion in near infrared region.In this thesis, the Ag@Ag_2S core-shell structure and the "blue silver" complex have been prepared.The samples were characterized by XRD and TEM, their optical absorption and photothermal properties were tested, and the photothermal conversion efficiency was calculated.The result is as follows: 1.Using nano-Ag cube and spherical particles as templates, octopoda Ag@Ag_2S and spherical Agbo-like Ag2s were prepared respectively.Compared with Ag nanoparticles, the photoabsorption peaks of Ag@Ag_2S and spherical Ag@Ag_2S were obviously widened, and the absorption intensity in the near infrared region was obviously enhanced.The maximum temperature rise of octopoda Ag@Ag_2S and spherical Ag@Ag_2S samples with 0.01% mass fraction under 808 nm laser irradiation was 35oC and 38oC, respectively, and the photothermal conversion efficiency was 58.56% and 63.07%, respectively.The results show that the photothermal conversion properties of Ag@Ag_2S with two morphologies are enhanced as compared with that of Ag and Ag_2S.Ag_2S/Ag heterostructures were prepared by in situ reduction of Ag_2S nanoparticles.Compared with Ag_2S nanoparticles, the absorption peak of AgS-1 / Ag heterostructure at 400nm is observed, and the absorption intensity in near-infrared region is enhanced.The maximum temperature rise and photothermal conversion efficiency of 0.01% Ag_2S/Ag irradiated by 808 nm laser are 17.2oC and 51.27oC, respectively. Compared with single-component Ag_2S, the maximum temperature rise and photothermal conversion efficiency of Ag_2S/Ag are enhanced by 0.3oC and 51.27oC, respectively.The "blue silver" complex was prepared by mixing AgNO_3 aqueous solution with sodium polyacrylate (P30) solution. The photoabsorption and photothermal properties of the complex were measured and the photothermal conversion efficiency was calculated.The maximum temperature rise is increased from 14.6 OC to 48.9 OC, and the photothermal conversion efficiency reaches the maximum at 0.03%, 68.79 鈩，

本文编号：1744608