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Textile dyes released from industries are tenacious contaminants that challenge conventional wastewater treatments. The present study aims to synthesize copper nanoparticles (CuONPs) using chemical and biological methods and to evaluate their photocatalytic property of some of the textile dyes. CuONPs were chemically synthesized using NaOH through precipitation method. For biological synthesis of CuONPs, green tea leaves (Camellia sinensis (L.) Kuntze) extract was used. The chemically synthesized (CS-CuONPs) and biologically synthesized (GS-CuONPs) were characterized via UV-VIS, FTIR, XRD, SEM and Zeta potential analyses and their photocatalytic degradation was evaluated. The crystallite size of CS-CuONPs (57.6 nm) was found higher than GS-CuONPs (46.7 nm). GS-CuONPs have shown less aggregation of nanoparticles compared to CS-CuONPs. For photocatalytic activity, both CS-CuONPs and GS-CuONPs were tested for dye degradation potential (0.01%) of Toluidine Blue (TB), Fast Green (FG), Congo Red (CR), Rhodamine B (Rh-B) and mixture (TB + FG + CR + Rh-B) for 6 hours under sunlight. Compared to CS-CuONPs, GS-CuONPs showed high potential for the degradation of selected dyes. The degradation rate of TB (96.38 ± 0.002) at 2 hr., FG (98.82 ± 0.002) at 1.5 hr. min, CR (95.23 ± 0.002) 3 hr. 30 min, Rh-B (94.79 ± 0.001) at 5 hr and mixture (95.83 ± 0.003) at 4 hr were found when exposed to sunlight. Thus, biologically synthesized CuONPs proved to be good candidate for efficient removal of water-soluble textile dyes.

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Comparative Photocatalytic Degradation of Textile dyes Using Chemically and Biologically Synthesized Copper Nanoparticles

  • 章节

  • 发表日期：

    2026年

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  • Meenambika Kumar,
  • Anju Rani George,
  • Sradha Sajeev,
  • Kavimani Thangasamy,
  • Natesan Geetha

摘要

Textile dyes released from industries are tenacious contaminants that challenge conventional wastewater treatments. The present study aims to synthesize copper nanoparticles (CuONPs) using chemical and biological methods and to evaluate their photocatalytic property of some of the textile dyes. CuONPs were chemically synthesized using NaOH through precipitation method. For biological synthesis of CuONPs, green tea leaves (Camellia sinensis (L.) Kuntze) extract was used. The chemically synthesized (CS-CuONPs) and biologically synthesized (GS-CuONPs) were characterized via UV-VIS, FTIR, XRD, SEM and Zeta potential analyses and their photocatalytic degradation was evaluated. The crystallite size of CS-CuONPs (57.6 nm) was found higher than GS-CuONPs (46.7 nm). GS-CuONPs have shown less aggregation of nanoparticles compared to CS-CuONPs. For photocatalytic activity, both CS-CuONPs and GS-CuONPs were tested for dye degradation potential (0.01%) of Toluidine Blue (TB), Fast Green (FG), Congo Red (CR), Rhodamine B (Rh-B) and mixture (TB + FG + CR + Rh-B) for 6 hours under sunlight. Compared to CS-CuONPs, GS-CuONPs showed high potential for the degradation of selected dyes. The degradation rate of TB (96.38 ± 0.002) at 2 hr., FG (98.82 ± 0.002) at 1.5 hr. min, CR (95.23 ± 0.002) 3 hr. 30 min, Rh-B (94.79 ± 0.001) at 5 hr and mixture (95.83 ± 0.003) at 4 hr were found when exposed to sunlight. Thus, biologically synthesized CuONPs proved to be good candidate for efficient removal of water-soluble textile dyes.