Military Technical College, Egyptian Armed Forces, Cairo, Egypt.
School of Chemical Engineering, Military Technical College, Cairo, Egypt.
Sci Rep. 2023 Aug 24;13(1):13819. doi: 10.1038/s41598-023-40970-4.
Hydroxyapatite (HA), the most common bioceramic material, offers attractive properties as a catalyst support. Highly crystalline mono-dispersed silver doped hydroxyapatite (Ag-HA) nanorods of 60 nm length was developed via hydrothermal processing. Silver dopant offered enhanced chemisorption for crystal violet (CV) contaminant. Silver was found to intensify negative charge on the catalyst surface; in this regard enhanced chemisorption of positively charged contaminants was accomplished. Silver dopant experienced decrease in the binding energy of valence electron for oxygen, calcium, and phosphorous using X-ray photoelectron spectroscopy XPS/ESCA; this finding could promote electron-hole generation and light absorption. Removal efficiency of Ag-HA nanocomposite for CV reached 88% after the synergistic effect with 1.0 mM HO; silver dopant could initiate HO cleavage and intensify the release of active ȮH radicals. Whereas HA suffers from lack of microbial resistance; Ag-HA nanocomposite demonstrated high activity against Gram-positive (S. aureus) bacteria with zone of inhibition (ZOI) mm value of 18.0 mm, and high biofilm inhibition of 91.1%. Ag-HA nanocompsite experienced distinctive characerisitcs for utilization as green bioceramic photocatalyst for wastewater treatment.
羟基磷灰石(HA)是最常见的生物陶瓷材料,作为催化剂载体具有吸引力。通过水热法制备了长度为 60nm 的高结晶单分散银掺杂羟基磷灰石(Ag-HA)纳米棒。银掺杂剂提供了对结晶紫(CV)污染物的增强化学吸附。发现银增强了催化剂表面的负电荷;在这方面,完成了对带正电荷污染物的增强化学吸附。使用 X 射线光电子能谱 XPS/ESCA 发现,银掺杂剂经历了价电子结合能对于氧、钙和磷的减少;这一发现可以促进电子空穴的产生和光吸收。Ag-HA 纳米复合材料在 1.0mM HO 的协同作用下对 CV 的去除效率达到 88%;银掺杂剂可以引发 HO 裂解并增强活性ȮH 自由基的释放。而 HA 缺乏微生物抗性;Ag-HA 纳米复合材料对革兰氏阳性(金黄色葡萄球菌)细菌表现出高活性,抑菌圈(ZOI)值为 18.0mm,生物膜抑制率为 91.1%。Ag-HA 纳米复合材料具有作为绿色生物陶瓷光催化剂用于废水处理的独特特性。
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