Solar Selectivity of Silver Nanoparticles Modified Copper Oxide Nanocomposite Thin Films Prepared by Facile Chemical Oxidation Method

• Published in: ChemistrySelect (Weinheim) Vol. 9; no. 41
• Main Authors: Vijay Arasu, Inbasekaran, Suresh, Santhanakrishnan, Kathiresan, Karuppiah, Pugazhenthiran, Nalandhiran, Awad Alahmadi, Tahani, Rameshkumar, Perumal, Karthick Kumar, Senthuran, Muthuchelian, Krishnaswamy
• Format: Journal Article
• Language: English
• Published: 04-11-2024
• Subjects: Chemical oxidation; Copper oxide; Nanocomposite; Silver nanoparticles; Solar selective absorber; Thin films
• ISSN: 2365-6549; 2365-6549
• DOI: 10.1002/slct.202402385

Silver nanoparticles modified copper oxide nanocomposite thin films (Ag‐CuO NC TFs) and pristine CuO TF were successfully synthesized on copper substrates using a chemical oxidation route. X‐ray diffractometry (XRD) characterization of Ag‐CuO NC TFs revealed the formation of monoclinic crystal structured CuO. Scanning electron microscopy (SEM) images showed a star‐like grain morphology of the Ag‐CuO NC TFs. Energy dispersive X‐ray spectroscopy (EDX) analysis ascertained the presence of anticipated elements without impurities. Fourier transform infrared spectroscopy (FTIR) investigation confirmed the presence of Ag NPs on CuO in the Ag‐CuO NC TFs. Raman spectroscopy examination indicated the presence of a spinel structure with vibrational and tetrahedral sites. UV‐Vis‐NIR reflectance analysis demonstrated that Ag‐CuO NC TFs with 2.0 wt.% Ag NPs exhibited solar absorptance of 72.39 %, thermal emittance of 4.3 %, and a highest solar selectivity of 16.83 among the prepared thin films. These results suggest that the Ag‐CuO NC TFs could be promising candidates for use as solar selective absorbers in solar thermal energy conversion devices.
Silver modified copper oxide nanocomposite thin films (Ag‐CuO NC TFs) were prepared on copper substrates by chemical oxidation route. XRD pattern of Ag‐CuO NC TFs revealed formation of monoclinic crystal structure and EDX spectrum disclosed presence of anticipated elements in the absence of impurities. Higher thermal conductivity of Ag NPs increases absorbance property of the Ag‐CuO NC TFs. The Ag‐CuO NC TF with 2.0 wt.% of Ag exhibited high solar selectivity of 16.83.