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<p>Numerous studies have investigated dye degradation; however, the development of eco-friendly, sustainable, and recyclable photocatalysts with efficient visible light activity remains limited. Conventional metal oxides typically exhibit wide band gaps and rapid recombination of photogenerated charge carriers, resulting in poor photocatalytic performance. The synergistic interaction between metal oxide nanoparticles and the biopolymer matrix addresses major drawbacks of bare metal oxides, such as easy agglomeration and low surface area. The present work focuses on an environmentally benign synthesis of a novel photocatalyst, nano-calcium oxide incorporated nanocellulose composite (CaO/NC) and subsequent photodegradation of organic dyes, namely Congo red (CR) and Malachite green (MG) under visible light irradiation. The synthesized material was characterized by X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, UV–Vis spectroscopy, Brunauer-Emmett-Teller gas adsorption (BET), Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM). The visible light-driven photocatalytic performance of the obtained CaO/NC composite was evaluated by monitoring the photodegradation of congo red (CR) and malachite green (MG). The synthesized nanocomposite was found to be an efficient photocatalyst and exhibited degradation efficiencies of 84% and 98% for Congo red and Malachite green degradation, respectively. The mechanism of photocatalytic degradation of dyes is also discussed.</p> Graphical Abstract <p></p>

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Fabrication of Recyclable Nanocomposite Based On Nanocellulose Supported CaO for Photocatalytic Degradation of Organic Dyes

  • 期刊论文

  • 发表日期：

    2026年4月4日

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  • Jumna Yoonus,
  • Asha Radhakrishnan,
  • A. Fathima Beevi,
  • Beena Bhaskaran

摘要

Numerous studies have investigated dye degradation; however, the development of eco-friendly, sustainable, and recyclable photocatalysts with efficient visible light activity remains limited. Conventional metal oxides typically exhibit wide band gaps and rapid recombination of photogenerated charge carriers, resulting in poor photocatalytic performance. The synergistic interaction between metal oxide nanoparticles and the biopolymer matrix addresses major drawbacks of bare metal oxides, such as easy agglomeration and low surface area. The present work focuses on an environmentally benign synthesis of a novel photocatalyst, nano-calcium oxide incorporated nanocellulose composite (CaO/NC) and subsequent photodegradation of organic dyes, namely Congo red (CR) and Malachite green (MG) under visible light irradiation. The synthesized material was characterized by X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, UV–Vis spectroscopy, Brunauer-Emmett-Teller gas adsorption (BET), Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM). The visible light-driven photocatalytic performance of the obtained CaO/NC composite was evaluated by monitoring the photodegradation of congo red (CR) and malachite green (MG). The synthesized nanocomposite was found to be an efficient photocatalyst and exhibited degradation efficiencies of 84% and 98% for Congo red and Malachite green degradation, respectively. The mechanism of photocatalytic degradation of dyes is also discussed.

Graphical Abstract