Diatomite/Cu/Al layered double hydroxide hybrid composites for polyethylene degradation |
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| Authors: | Nengshuo Fu Shuhua Zhang Yingying Ma Zhuo Yang Weijun Liu |
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| Affiliation: | College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620 China.; College of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620 China |
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| Abstract: | A diatomite/Cu/Al layered double hydroxide hybrid composite (DI-LDH) was synthesized using the hydrothermal method. The synthesized DI-LDH composites were characterized via X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and the Brunauer–Emmett–Teller (BET) method. Polyethylene degradation over DI-LDH was studied in a batch reactor. DI-LDH showed layered structures, indicating that the diatomite/Cu/Al double hydroxide hybrid was successfully synthesized. A significant decrease in the degradation temperature and the released amounts of CO and CO2 was observed in the DI-LDH catalytic degradation reaction, which indicated that DI-LDH was helpful for the polyethylene degradation reaction. The X-ray photoelectron spectroscopy (XPS) results suggested that the reaction of Cu2+ → Cu+ occurred in polyethylene catalytic pyrolysis, which resulted in the decrease in the released CO amount. DI-LDH may be a potential environmental catalyst that can be applied to treat LDPE waste.DI-LDH that can reduce the pyrolysis temperature of LDPE and the release of carbon monoxide (CO) and carbon dioxide (CO2). |
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