Affiliation:
1. Technical University of Cluj-Napoca
2. National Institute of Chemistry
3. Andaltec
4. University of Camerino
Abstract
Abstract
The morpho-structural, environmental and photocatalytical characteristics of Ag-graphene-TiO2 composite recovered from an used polylactic acid (PLA)-based film in comparison with those of the new prepared composite are reported. The recovered Ag-graphene-TiO2 composite displayed color, consistence, appearance, homogeneity and dispersion of nano-Ag similar with the new prepared compound. The FTIR spectroscopy showed that the oxygen and silver`s contents were 7 wt% higher in the recovered composite in comparison with the new prepared composite. The gap energy (Eg) of the recovered composite is 1.4 times and 2.3 times lower than that of new composite and TiO2, respectively. The anatase`s content decreased by 70% during the recovering, while that of rutile rised with the same magnitude. The photocatalytic activity of the recovered composite decreased only by 30% in comparison with the new composite. Additionally, the Life-Cycle Analysis (LCA) showed that the recovering procedure had a considerably lower environmental impact than the preparation of the new composite in terms of human health, ecosystem quality, climate change and resources. In conclusion, the recovering of the nanostructed composites from the active PLA-based films should be promising way to imporve the waste management.
Publisher
Research Square Platform LLC
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