Journal
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
Volume 8, Issue 5, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2020.104178
Keywords
Polypyrrole nanostructures; Organic-inorganic hybrid nanocomposites; Conjugated polymers; Titanium dioxide; Photocatalysis; Depollution
Categories
Funding
- China Scholarship Council (CSC)
- IDEX Paris-Saclay
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Engineering photocatalytic materials for solar energy harvesting and environmental remediation is a very promising prospect to solve energy and environment issues. Here we report the preparation of a nanocomposite formed by TiO2 with nanostructured polypyrrole (PPyNS-TiO2) and its photocatalytic properties. We show that this nanocomposite is very active for water and air treatment under UV and visible light irradiation. This activity is higher than that of bare TiO2 and PPyNs, and much improved compared to that of TiO2-bulk polypyrrole (PPybulk-TiO2). The nanostructuration of the conjugated polymer is a key factor for the photocatalytic activity of the composite. The large enhancement of the photocatalytic activity is ascribed to the heterojunction between PPyNs and TiO2, which broadens the absorption of visible light and facilitates the charge carriers' separation. These results foresee the composite PPyNS-TiO2 photocatalyst for water and air purification in environment remediation.
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