Nurul Akmal, Che Lah and Puhanes, Murthy and Mohd Nashrul, Mohd Zubir (2022) The physical and optical investigations of the tannic acid functionalised Cu-based oxide nanostructures. Scientific Reports, 12 (9909). pp. 1-20. ISSN 2045-2322. (Published)
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Abstract
The need for a mild, low-cost, green environment that is able to produce exotic properties of output nanostructures is appealing nowadays. Employing these requirements, the copper (Cu)—based oxide nanostructures have been successfully synthesised via one-pot reaction using biocompatible natural polyphenol, tannic acid (TA) as both the reducing agent and stabiliser at 60, 70 and 80 °C. The structural and optical studies disclosed the efect of TA on the surface morphology, phase purity, elemental composition, optical microstrain and optical intrinsic energy of this mixed Cu2O and CuO nanostructures. The optically based method describes the comparative details of the multi-band gap in the presence of more than one element with overlapping spectra from the frstderivative absorbance curve and the exponential absorbance of Urbach tail energy EU towards the conventional Tauc bandgap. The A demonstrates that the pronounced efect of TA that Cu2O and CuO nanostructures creates much sensitive frst-derivative bandgap output compared to the Tauc bandgap. The results also show that the EU reduced as the temperature reaches 70 °C and then experienced sudden increase at 80 °C. The change in the pattern is parallel to the trend observed in the Williamson– Hall microstrain and is evident from the variations of the mean crystallite size Dm which is also a cause response to the change in temperature or pH. Therefore, the current work has elucidated that the structural and optical correlations on the as-synthesised Cu2O and CuO nanostructures in the presence of TA were the combined reaction of pH change and the ligand complexation reactions. The acquired results suggest a more comprehensive range of studies to further understand the extent relationship between the physical and optical properties of TA functionalised Cu-based oxide nanostructures.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | tannic acid (TA) , Cu-based oxide nanostructures, single-stage chemical reduction method |
| Subjects: | Q Science > Q Science (General) T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures |
| Faculty/Division: | Institute of Postgraduate Studies Centre of Excellence: Centre of Excellence for Advanced Research in Fluid Flow Faculty of Manufacturing and Mechatronic Engineering Technology |
| Depositing User: | Dr. Nurul Akmal Che Lah |
| Date Deposited: | 26 Aug 2022 08:34 |
| Last Modified: | 26 Aug 2022 08:34 |
| URI: | http://umpir.ump.edu.my/id/eprint/35010 |
| Download Statistic: | View Download Statistics |
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