Abstract

In the present study, nickel oxide nanoparticles were prepared using the aqueous extract of Zizyphus jujuba. The temperature and time calcination was studied on size and morphology of synthesized nanoparticles. In addition, the obtained nanoparticles were identified through PXRD, UV-Vis, Raman, FESEM, and EDX methods. The results of PXRD, which were surveyed through Debye-Scherrer and Rietveld refinement, confirmed the face centered cubic (FCC) structure of synthesized nanoparticles. The formation of synthesized NiO NPs was indicated by peak that was revealed at 295 nm through UV-Vis spectrum. According to the FESEM results, the obtained nanoparticles (at 350 to 600 ˚C temperatures) were uniformed in shape and contained a size range of about 5–30 nm. Subsequent to investigating their photocatalytic activity against methylene blue (MB) dye in the role of a cationic dye, we estimated the degradation coefficient of methylene blue to be 65.5% throughout 180 min of treatment time.

摘要

在本研究中，使用大枣的水提取物制备氧化镍纳米颗粒.研究了煅烧温度和时间对合成纳米颗粒的尺寸和形态的影响。此外，通过 PXRD、UV-Vis、拉曼、FESEM 和 EDX 方法对获得的纳米粒子进行了鉴定。通过 Debye-Scherrer 和 Rietveld 精修调查的 PXRD 结果证实了合成纳米粒子的面心立方 (FCC) 结构。通过紫外-可见光谱在 295 nm 处显示的峰表明合成的 NiO NPs 的形成。根据 FESEM 结果，获得的纳米颗粒（在 350 至 600 摄氏度的温度下）形状均匀，尺寸范围约为 5-30 nm。在研究它们在阳离子染料作用下对亚甲蓝 (MB) 染料的光催化活性后，我们估计亚甲蓝的降解系数为 65。在 180 分钟的治疗时间内为 5%。