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Flaxseed‐Derived Rhamnogalacturonan as a Biogenic Stabilizer for CuO Nanoparticles With Photocatalytic, Antimicrobial, and Pollutant‐Sensing Applications.

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Title: Flaxseed‐Derived Rhamnogalacturonan as a Biogenic Stabilizer for CuO Nanoparticles With Photocatalytic, Antimicrobial, and Pollutant‐Sensing Applications.
Authors: Zulfiqar, Zarfishan1 (AUTHOR), Fatima, Zain1 (AUTHOR), Azeeqa, Nimrim2 (AUTHOR), Iram, Fozia3 (AUTHOR), Ahmad, Imran4 (AUTHOR), Wajid, Muhammad5 (AUTHOR) drwajid.rims1986@gmail.com, Majeed, Aamna1 (AUTHOR), Qaiser, Muhammad Naeem6 (AUTHOR), Muhammad, Gulzar1 (AUTHOR) mgulzar@gcu.edu.pk
Source: Environmental Quality Management. Spring2026, Vol. 35 Issue 3, p1-16. 16p.
Subject Terms: *Sustainable chemistry, *Pollution monitoring, *Environmental remediation, Copper oxide, Flaxseed, Anti-infective agents, Photocatalysts, Polysaccharides
Abstract: The study presents the green synthesis of copper oxide nanoparticles (CuO NPs) using the rhamnogalacturonan‐rich mucilage from flaxseed (Linum usitatissimum) as a natural stabilizing agent. The CuO NPs were characterized using spectroscopic techniques, including UV‐Visible spectroscopy, FTIR, SEM, and XRD. The UV analysis revealed a sharp band at 294 nm with an energy band gap of 4.27 eV; hence, the prepared CuO NPs are semiconductor materials. FTIR spectrum revealed an intense peak at 590 cm−1, attributed to Cu‐O bonds. SEM analysis discovered that the CuO NPs were non‐spherical, polydispersed, and agglomerated. The XRD analysis showed a monoclinic crystal structure with crystallite sizes of 11–31 nm. The photocatalytic activity of CuO NPs was responsible for the decomposition of 87.2% methylene blue (MB) in sunlight following pseudo‐first‐order (k = 0.01708 min−1) kinetics. The CuO NPs depicted significant antimicrobial activity and complete biofilm inhibition at 100 µg/mL against Bacillus licheniformis, Escherichia coli, and Pseudomonas aeruginosa. In addition, CuO NPs acted as sensors for heavy metal ions such as Pb2+ and Fe2+. The study suggests the potential of rhamnogalacturonan‐capped CuO NPs for successful use in antibacterial applications, environmental remediation, and pollutant detection. [ABSTRACT FROM AUTHOR]
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Database: GreenFILE
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Abstract:The study presents the green synthesis of copper oxide nanoparticles (CuO NPs) using the rhamnogalacturonan‐rich mucilage from flaxseed (Linum usitatissimum) as a natural stabilizing agent. The CuO NPs were characterized using spectroscopic techniques, including UV‐Visible spectroscopy, FTIR, SEM, and XRD. The UV analysis revealed a sharp band at 294 nm with an energy band gap of 4.27 eV; hence, the prepared CuO NPs are semiconductor materials. FTIR spectrum revealed an intense peak at 590 cm−1, attributed to Cu‐O bonds. SEM analysis discovered that the CuO NPs were non‐spherical, polydispersed, and agglomerated. The XRD analysis showed a monoclinic crystal structure with crystallite sizes of 11–31 nm. The photocatalytic activity of CuO NPs was responsible for the decomposition of 87.2% methylene blue (MB) in sunlight following pseudo‐first‐order (k = 0.01708 min−1) kinetics. The CuO NPs depicted significant antimicrobial activity and complete biofilm inhibition at 100 µg/mL against Bacillus licheniformis, Escherichia coli, and Pseudomonas aeruginosa. In addition, CuO NPs acted as sensors for heavy metal ions such as Pb2+ and Fe2+. The study suggests the potential of rhamnogalacturonan‐capped CuO NPs for successful use in antibacterial applications, environmental remediation, and pollutant detection. [ABSTRACT FROM AUTHOR]
ISSN:10881913
DOI:10.1002/tqem.70308