Catalysis and Nanomaterials Research Laboratory, Department of Chemistry, Loyola College, Chennai 600034, India; Department of Chemistry, Jeppiaar Engineering College, Chennai 600119, India.
Catalysis and Nanomaterials Research Laboratory, Department of Chemistry, Loyola College, Chennai 600034, India.
J Photochem Photobiol B. 2018 Mar;180:39-50. doi: 10.1016/j.jphotobiol.2018.01.023. Epub 2018 Jan 31.
In the present study, we report the green synthesis of NiO nanoparticles using Aegle marmelos as a fuel and this method is ecofriendly and cost effective. The plant Aegle marmelos is used in the field of pharmaceuticals to cure diseases like chronic diarrhea, peptic ulcers and dysentery in India for nearly 5 centuries. The as-prepared nanoparticles were confirmed as pure face centered cubic phase and single crystalline in nature by XRD. The formation of agglomerated spherical nanoparticles was shown by HR-SEM and HR-TEM images. The particle size calculated from HR-SEM was in the range 8-10 nm and it matches with the average crystallite size calculated from the XRD pattern. NiO shows intense emission peaks at 363 and 412 nm in its PL spectra. The band gap of 3.5 eV is observed from DRS studies and the formation of pure NiO is confirmed by FT-IR spectra. The as-prepared NiO nanoparticles show super paramagnetic behavior, when magnetization studies are carried out. It is then evaluated for cytotoxic activity towards A549 cell culture, antibacterial activity and photocatalytic degradation (PCD) of 4‑chlorophenol (4‑CP), which is known as the endocrine disrupting chemical (EDC). From the results, it is found that the cell viability of A549 cells was effectively reduced and it showed better antibacterial activity towards gram positive bacterial strains. It is also proved to be an efficient and stable photocatalyst towards the degradation of 4‑CP.
在本研究中，我们报告了使用酸橙作为燃料的 NiO 纳米粒子的绿色合成，这种方法既环保又经济实惠。酸橙在印度的制药领域被用于治疗慢性腹泻、消化性溃疡和痢疾等疾病，已有近 500 年的历史。通过 XRD 证实了所制备的纳米粒子为纯面心立方相和单晶。HR-SEM 和 HR-TEM 图像显示了团聚的球形纳米粒子的形成。从 HR-SEM 计算出的粒径范围为 8-10nm，与从 XRD 图谱计算出的平均晶粒尺寸相匹配。NiO 在其 PL 光谱中显示出强烈的发射峰，分别位于 363 和 412nm。DRS 研究观察到 3.5eV 的带隙，FT-IR 光谱证实了纯 NiO 的形成。所制备的 NiO 纳米粒子在进行磁化研究时表现出超顺磁性。然后，对其进行了细胞毒性活性评估，包括 A549 细胞培养、抗菌活性和 4-氯苯酚（4-CP）的光催化降解（PCD），4-CP 被认为是内分泌干扰化学物质（EDC）。结果表明，A549 细胞的细胞活力有效降低，对革兰氏阳性菌表现出更好的抗菌活性。它也被证明是一种高效稳定的光催化剂，可用于 4-CP 的降解。
