Effect of fractional graphite alloying on the properties of aloe-vera mediated green-synthesized NiOx-C composite

This study emphasizes the synthesis of nickel oxide (NiOx + C) nanoparticles with varied graphite (C) proportions (1%, 2.5%, 5%, 7.5%, and 10%) using Aloe-Vera natural extract as a green reducing agent. Prepared NiOx + C nanostructures exhibited consistent X-ray diffraction patterns with no addition...

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Bibliographic Details
Published inJournal of Taibah University for Science Vol. 18; no. 1
Main Authors A. K. Mahmud Hasan, D. K. Sarkar, M. S. Basar, Munira Sultana, Mohammad Junaebur Rashid, Mohammod Aminuzzaman, Md. Shahiduzzaman, Hamad F. Alharbi, Md. Akhtaruzzaman
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 31.12.2024
Subjects
graphite alloying
green synthesis
natural complexing agent
Nickel oxide
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Summary:This study emphasizes the synthesis of nickel oxide (NiOx + C) nanoparticles with varied graphite (C) proportions (1%, 2.5%, 5%, 7.5%, and 10%) using Aloe-Vera natural extract as a green reducing agent. Prepared NiOx + C nanostructures exhibited consistent X-ray diffraction patterns with no additional C peak, signifying enhanced interlayer spacing. The crystalline size (Dp) decreased from 27 nm to 20 nm with an increase in the amount of carbon (C). The determined bandgap (Eg) was 2 eV higher than bulk material due to formation extra energy level at defect sites. The shoulder peak at 1620 cm−1 agrees with the disorder-induced band from C and second-order bands of C at about 2700 cm−1 for NiOx + C. FESEM images confirm the hexagonal morphology. Not much particle aggregation was observed except for 10% C content. The selected area electron diffraction (SAED) confirms the existence of NiOx crystalline orientations including planes (111), (200), (220), (311), and (222).
ISSN:1658-3655
DOI:10.1080/16583655.2023.2298524