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From Green Remediation to Polymer Hybrid Fabrication with Improved Optical Band Gaps

1
Department of Manufacturing and Materials Engineering, Faculty of Engineering, International Islamic University of Malaysia, Kuala Lumpur, Gombak 53100, Malaysia
2
Advanced Polymeric Materials Research Lab., Department of Physics, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Iraq
3
Komar Research Center (KRC), Komar University of Science and Technology, Sulaimani 46001, Iraq
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2019, 20(16), 3910; https://doi.org/10.3390/ijms20163910
Received: 2 June 2019 / Revised: 4 August 2019 / Accepted: 8 August 2019 / Published: 11 August 2019
(This article belongs to the Section Physical Chemistry and Chemical Physics)
The present work proposed a novel approach for transferring high-risk heavy metals tometal complexes via green chemistry remediation. The method of remediation of heavy metals developed in the present work is a great challenge for global environmental sciences and engineering because it is a totally environmentally friendly procedure in which black tea extract solution is used. The FTIR study indicates that black tea contains enough functional groups (OH and NH), polyphenols and conjugated double bonds. The synthesis of copper complex was confirmed by the UV-vis, XRD and FTIR spectroscopic studies. The XRD and FTIR analysis reveals the formation of complexation between Cu metal complexes and Poly (Vinyl Alcohol) (PVA) host matrix. The study of optical parameters indicates that PVA-based hybrids exhibit a small optical band gap, which is close to inorganic-based materials. It was noted that the absorption edge shifted to lower photon energy. When Cu metal complexes were added to PVA polymer, the refractive index was significantly tuned. The band gap shifts from 6.2 eV to 1.4 eV for PVA incorporated with 45 mL of Cu metal complexes. The nature of the electronic transition in hybrid materials was examined based on the Taucs model, while a close inspection of the optical dielectric loss was also performed in order to estimate the optical band gap. The obtained band gaps of the present work reveal that polymer hybrids with sufficient film-forming capability could be useful to overcome the drawbacks associated with conjugated polymers. Based on the XRD results and band gap values, the structure-property relationships were discussed in detail. View Full-Text
Keywords: green remediation; extract tea solution; polyphenol; copper complex; polymer hybrid; UV-vis study; XRD study; FTIR study; optical properties green remediation; extract tea solution; polyphenol; copper complex; polymer hybrid; UV-vis study; XRD study; FTIR study; optical properties
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MDPI and ACS Style

Brza, M.A.; Aziz, S.B.; Anuar, H.; Al Hazza, M.H.F. From Green Remediation to Polymer Hybrid Fabrication with Improved Optical Band Gaps. Int. J. Mol. Sci. 2019, 20, 3910.

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