Iwan Sugihartono, Ridha Octa Alhuriyyah Azzahra, Nurfina Yudasari, Esmar Budi, Riser Fahdiran, Widyaningrum Indrasari, Tan Swee Tiam, Rahmat Setiawan Mohar, Isnaeni, Djoko Triyono, Fera Kurniadewi, Agus Setyo Budi
We have demonstrated green synthesis of ZnO nanoparticles using Moringa oleifera leaves (Mor-ZnO NPs) extract by co-precipitation method under 450oC for 2 hours with different pH-5, pH-7, and pH-8. The physical properties (i.e. structural, morphology, and absorbance) have been analyzed using X-ray diffraction (XRD) measurement, scanning electron microscopy (SEM), and ultraviolet-visible (UV-Vis) spectrophotometer. Furthermore, to investigate the functional group and antioxidant activity we performed Fourier transform infra-red (FTIR) analysis and 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. Structurally, all samples possess polycrystalline hexagonal wurtzite structure. Morphologically, the pH values affect the morphology of Mor-ZnO NPs. Optically, the Mor-ZnO NPs with pH-8 have strong absorption in the range of short ultraviolet (200-280 nm). We predict that the basic pH value on green synthesize of Mor-ZnO NPs tune the near band edge absorption (NBA), which relates to the recombination of the free excitons. Whereas, based on the FTIR spectra analysis, the Zn-O stretching can be identified at 442.67 cm-1, 458.67 cm-1, and 442.67 cm-1 for Mor-ZnO NPs with the pH-5, pH-7, and pH-8, respectively. According to DPPH assay, the Mor-ZnO NPs with pH-8 at 200 mg/ml has higher inhibition rate (67.7%). Hence, we believed that the Mor-ZnO NPs are potential antioxidants. © 2024, Hanyang University. All rights reserved.
Program Studi Fisika, FMIPA, Universitas Negeri Jakarta, Jalan Rawamangun Muka no. 01, Jakarta Timur, 13220, Indonesia; National Research and Innovation Agency, KST BJ Habibie, South Tangerang, 15314, Indonesia; School of Energy and Chemical Engineering, Xiamen University Malaysia, Selangor Darul Ehsan, 43900, Malaysia; Departemen Fisika, FMIPA, Universitas Indonesia, Kampus Baru UI, Depok, 16424, Indonesia; Program Studi Kimia, FMIPA, Universitas Negeri Jakarta, Jalan Rawamangun Muka no. 01,, Jakarta Timur, 13220, Indonesia
Research at a Glance
Register to unlock
Topics & SDG Alignment
Register to unlock
Collaboration
Register to unlock
Author Profile (Selected)
Register to unlock
References Overview
Register to unlock
Journal & Source
Register to unlock
Metadata & Integrity
Register to unlock