4.7 Article

Construction of Ag-ZnO/cellulose nanocomposites via tunable cellulose size for improving photocatalytic performance

Journal

JOURNAL OF CLEANER PRODUCTION
Volume 288, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2020.125089

Keywords

ZnO NPs; Ag NPs; Cellulose; Nanocomposites; Photocatalysis

Funding

  1. National Natural Science Foundation of China [31570576]
  2. China Postdoctoral Science Foundation [2020M671505]

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The Ag-ZnO/cellulose nanocomposites with tunable structure and properties were fabricated for degrading MO dye. By adjusting the cellulose fiber size, the morphology of ZnO was controlled, resulting in enhanced photocatalytic activities and recovery efficiency. This approach provides a novel method for improving the performance of Ag-ZnO/cellulose nanocomposites.
The Ag-ZnO/cellulose nanocomposites with tunable structure and properties was fabricated and used as an effective photocatalyst for degrading methyl orange (MO) dye. The structure and properties of the Ag-ZnO/cellulose nanocomposites were regulated by the cellulose fiber size via different times of grinding treatment. The morphologies of ZnO NPs changed from flower-like to flaky with the decrease of diameter of cellulose fiber from 130 nm to 42 nm, and loading amounts of ZnO and Ag NPs on photocatalyst increased from 56.12% to 57.46% and 5.28%-6.54% respectively. The finer fibrils provided a more uniform network compared with coarse fibers, which is benefit for stable distribution of ZnO and Ag nanoparticles (NPs) and facile separation from wastewater. The Ag-ZnO/cellulose nanocomposites, prepared from cellulose fiber with grinding treatment of 30 times, exhibited homogeneous three-dimensional cellulose network with specific surface area of 40.64 m(2)/g and possessed excellent photocatalytic activities and reusability for MO degradation. This work provided a novel approach to control the morphology of ZnO by tuning cellulose size, for improving photocatalytic activities and recovery efficiency of Ag-ZnO/cellulose nanocomposites. (C) 2020 Elsevier Ltd. All rights reserved.

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