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Photocatalytic membrane of TiO2/CNT decorated PAN nanofibers with enhanced performance under LED visible-light irradiation

Author

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  • Lathifah Puji Hastuti
  • Ahmad Kusumaatmaja
  • Adi Darmawan
  • Indriana Kartini

Abstract

Incorporating TiO 2 with CNTs and PAN nanofiber structures results in a photocatalytic membrane composite with an attractive response in the visible region. It offers an efficient process without post-treatment separation at the end of the photocatalytic treatment. The composite membranes were fabricated using electrospinning at 7 kV with 10 cm in the distance between needle tip and collector at a flow rate of 1 mL h −1 . Polyacrylonitrile (PAN) was used as the polymer matrix. All the as-spun composites exhibited randomly oriented nanofibers. CNT increased the fiber diameters from 324 to 463 nm. The bandgap of TiO 2 also shifted from 3.15 to 2.76 eV at the narrowest The color removal kinetics follow the Langmuir-Hinshelwood pseudo-first-order kinetics model with the highest rate constant of 0.0225 min −1 shown by PAN/TiO 2 /CNT 20%. More than 95% color removal of methylene blue after 100 min irradiation has been achieved using LED lamps of low energy visible light (43.5 W). Such a result is supposed to be the highest employing low energy lamps.

Suggested Citation

  • Lathifah Puji Hastuti & Ahmad Kusumaatmaja & Adi Darmawan & Indriana Kartini, 2023. "Photocatalytic membrane of TiO2/CNT decorated PAN nanofibers with enhanced performance under LED visible-light irradiation," Energy & Environment, , vol. 34(7), pages 2364-2385, November.
    • Handle: RePEc:sae:engenv:v:34:y:2023:i:7:p:2364-2385
    DOI: 10.1177/0958305X221108494
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    Keywords

    CNT; TiO2; nanofiber; visible-light; photocatalytic membrane;
    All these keywords.

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