AI Article Synopsis
- Plastic debris, particularly polystyrene (PS), presents significant environmental issues, but innovative reuse strategies are being explored.
- A new method involves embedding SnO nanoparticles into PS foams, created from plastic waste, which enhances their photocatalytic ability for dye degradation.
- The resulting PS/SnO nanofoams efficiently degrade rhodamine B dye under UV light, achieving 98.2% removal, and maintain their effectiveness even after being reused five times.
Article Abstract
Plastic debris is a major environmental concern, and to find effective ways to reuse polystyrene (PS) presents major challenges. Here, it is demonstrated that polystyrene foams impregnated with SnO are easily generated from plastic debris and can be applied to photocatalytic degradation of dyes. SnO nanoparticles were synthesized by a polymeric precursor method, yielding specific surface areas of 15 m/g after heat treatment to 700 °C. Crystallinity, size, and shape of the SnO particles were assessed by X-ray diffraction (XRD) and transmission electron microscopy (TEM), demonstrating the preparation of crystalline spherical nanoparticles with sizes around 20 nm. When incorporated into PS foams, which were generated using a thermally induced phase separation (TIPS) process, the specific surface area increased to 48 m/g. These PS/SnO nanofoams showed very good efficiency for photodegradation of rhodamine B, under UV irradiation, achieving up to 98.2% removal. In addition the PS/SnO nanofoams are shown to retain photocatalytic activity for up to five reuse cycles.
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| http://dx.doi.org/10.1021/acsami.7b19834 | DOI Listing |
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