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Bi2S3 preparation

wallpapers News 2021-12-23
Take 0.97gBi(NO3)3·5H2O(0.002mol) and dissolve it with 15mLDMF as solution A.15mLDMF was added to 0.72 g-cystine (0.003mol), and its pH was adjusted to 10-11 with 2mol/L(M)NaOH as solution B.Solution B was added to solution A under constant agitation, stirred for 10min, and put into A Teflon lined pressure kettle with A volume of 50mL, sealed, kept at A constant temperature of 160℃ for 5d, and naturally cooled to room temperature. The black product was washed with anhydrous ethanol and distilled water several times and finally dried at 60℃ for 5h in a vacuum drying oven. Under the same conditions, the samples were synthesized with a mixture of distilled water, distilled water, and ethylene glycol (2:1) instead of DMF solvent. The crystal structure of the black powder was determined by BrukerD8 X-ray diffractometer (copper target, λ=0.15406nm). The morphology of the samples was characterized by JSM-6700F field emission scanning electron microscope (8kV) and TecnaiG2F20 transmission electron microscope (200kV). Using Bi(NO3)3·5H2O and L-cystine as raw materials, the structure of Bi2S3 nanorods can be prepared by solvothermal reaction in DMF (160℃, 5d). L-cystine can be used as a sulfur source, and 2mol/NaOH can be added into DMF solvent to prepare Bi2S3 nanorods with good morphology.
Bismuth sulfide nanorods as an effective photothermal therapy for cancer
Bi 2 S 3 nanostructures can theoretically possess photothermal properties. However, due to the adverse photothermal effect, there are few reports on the application of bismuth sulfide in photothermal therapy. To solve this problem, Bi 2 S 3 nanorods with the defective structure were obtained by a simple method in this paper. Due to its special shape and defects, Bi 2 S 3 nanorods exhibit strong absorption bands in the near-infrared region, thus showing excellent photothermal effects. Due to the strong NIR absorption, the calculated value of Bi 2 S 3 photothermal conversion efficiency is as high as 78.1%. Importantly, photothermal ablation experiments demonstrated in vitro and in vivo that Bi 2 S 3 nanorods can effectively kill cancer cells under 808 nm laser irradiation. In addition, Bi 2 S 3 nanorods can be used as effective CT imaging agents due to the inherent high X-ray attenuation coefficient of bismuth. Our work shows that Bi 2 S 3 nanorods are very promising photothermal nanoplatforms for cancer photothermal therapy under the guidance of CT imaging.

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