ZnO/cellulose nanofiber composites for sustainable sunlight-driven dye degradation

Mostafa Dehghani, Humayun Nadeem, Vikram Singh Raghuwanshi, Hamidreza Mahdavi, Mark M. Banaszak Holl, Warren Batchelor

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Porous ZnO/cellulose nanofiber (CNF) composites were synthesized to investigate their photocatalytic degradation of methylene blue (MB) dye (a persistent organic pollutant model) under a UV lamp and sunlight. UV/vis analysis indicated that complete photodegradation was achieved in about 10 min under natural sunlight with low UV intensity (between 1500 and 2900 μW/cm-1 of UVA/B). Scanning electron microscopy, Fourier transform infrared, Brunauer- Emmett-Teller, X-ray diffraction, and small-angle X-ray scattering characterization of the composite were consistent with flower/plate morphology ZnO nanomaterials of similar size to the CNF fiber diameter distributed in the matrix. The catalyst with 0.3 M Zn(Ac)2 and 1.5 wt % CNF loading was the sample with the highest MB photodegradation efficiency of >99% in less than 10 min. This study provides proof-of-concept of a simple, sustainable, ecofriendly, and industrially scalable approach to synthesize extremely efficient ZnO/CNF photocatalysts for the degradation of organic pollutants. Catalyst performance showed greater dye degradation with a function of irradiation time as compared to state-of-the-art catalysts reported in the literature.

Original languageEnglish
Pages (from-to)10284-10295
Number of pages12
JournalACS Applied Nano Materials
Volume3
Issue number10
DOIs
Publication statusPublished - 23 Oct 2020

Keywords

  • Dye degradation
  • Photocatalyst
  • Sunlight irradiation
  • Sustainable processing
  • Wastewater treatment
  • ZnO/CNF composite

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