ABSTRACT

Synthesis of multifunctional hybrid materials for X-rays’ attenuation is attracting more recognition recently because of several superiorities over the conventional radiation shielding materials made using toxic lead-based compounds. For the first time*, the present study investigates the microwave irradiation based green synthesis and in-situ stabilization of bismuth oxide (Bi₂O₃) nanoparticles on multiwalled carbon nanotubes (MWCNT) by a novel approach for making advanced material. TEM and XRD studies have shown that nanoparticles have a uniform size with polygonal morphology and are impregnated on MWCNT. The developed hybrid nanocomposite's physical appearance is gel-like. It was then applied on a cotton fabric piece to create a multifunctional material and valuable for the fabrications of aprons, bandages, and X-ray shielding caskets. The porous nature of cotton fabric has facilitated the adhesion and stabilization of the nanocomposite. The elemental composition and topology of the hybrid material were further analyzed by XPS, EDX and AFM studies, respectively. The higher attenuation characteristics and shielding efficiency of the developed material are due to the dual shielding effect of polygonal nanoparticles and MWCNT. Availability of metal atoms with higher valency allowed the higher photoelectric effect followed by the Compton effect during X-ray shielding.

摘要

用于X射线衰减的多功能杂化材料的合成近来受到越来越多的关注，这是因为它比使用有毒铅基化合物制成的常规辐射屏蔽材料更具优势。本研究首次*研究了基于微波辐射的绿色合成和氧化铋（Bi ₂ O ₃）通过一种用于制备高级材料的新颖方法在多壁碳纳米管（MWCNT）上形成纳米颗粒。TEM和XRD研究表明，纳米颗粒具有均匀的大小和多边形的形态，并且被浸渍在MWCNT上。已开发的杂化纳米复合材料的物理外观呈凝胶状。然后将其应用到棉织物片上，以创建一种多功能材料，对于制造围裙，绷带和X射线屏蔽棺材非常有用。棉织物的多孔性质促进了纳米复合材料的粘附和稳定。分别通过XPS，EDX和AFM研究进一步分析了杂化材料的元素组成和拓扑。所开发材料的更高衰减特性和屏蔽效率归因于多边形纳米颗粒和MWCNT的双重屏蔽作用。具有更高价态的金属原子的可用性允许在X射线屏蔽期间具有更高的光电效应，然后是康普顿效应。