In this present study, photocatalytic and in-vitro biological properties of biogenic preparation of husked rice-shaped iron oxide nanoparticles (Fe₂O₃ NPs) are investigated. Fe₂O₃ NPs have been prepared by the reduction of iron chloride (FeCl₃) using coconut pulp (Cocos nucifera L.) extract. The Fe₂O₃ NPs were characterized by various analytical techniques such as FE-SEM, TEM, XRD, FT-IR, TGA, VSM, PL, and UV-DRS. Based on the characterization results, the as-prepared Fe₂O₃ NPs are in husked rice shape and exhibit rhombohedral crystal phase and also show an excellent stability. The prepared Fe₂O₃ NPs was investigated as a catalyst for the photocatalytic degradation of Rhodamine B solution. The photocatalytic results indicated that the Fe₂O₃ NPs catalyst possesses good activity with efficiency of 92% after 50 min under visible-light irradiation. In addition, the Fe₂O₃ NPs showed good antibacterial and anticancer properties against Gram-negative Escherichia coli and Gram-positive, Staphylococcus aureus and HepG2 cell lines, resulting in effective antibacterial and anticancer activity. The prepared Fe₂O₃ NPs, thus, proved to be a potential material for environmental remediation and biological applications.

在本研究中，研究了稻壳状氧化铁纳米粒子 (Fe ₂ O ₃ NPs)生物制备的光催化和体外生物学特性。Fe ₂ O ₃ NPs 是通过使用椰浆(Cocos nucifera L.)提取物还原氯化铁 (FeCl ₃ )制备的。Fe ₂ O ₃ NPs 通过各种分析技术进行表征，例如 FE-SEM、TEM、XRD、FT-IR、TGA、VSM、PL 和 UV-DRS。根据表征结果，所制备的 Fe ₂ O ₃NPs 呈稻壳状，呈菱形晶相，并显示出优异的稳定性。研究了制备的 Fe ₂ O ₃ NPs 作为光催化降解罗丹明 B 溶液的催化剂。光催化结果表明，Fe ₂ O ₃ NPs催化剂在可见光照射50分钟后具有良好的活性，效率为92%。此外，Fe ₂ O ₃ NPs 对革兰氏阴性大肠杆菌和革兰氏阳性、金黄色葡萄球菌和 HepG2 细胞系显示出良好的抗菌和抗癌特性，从而产生有效的抗菌和抗癌活性。因此，所制备的 Fe ₂ O ₃ NPs 被证明是一种用于环境修复和生物应用的潜在材料。